id stringlengths 24 24 | title stringclasses 442
values | context stringlengths 151 3.71k | question stringlengths 1 25.7k | answers dict |
|---|---|---|---|---|
5acd3b1f07355d001abf39a7 | BeiDou_Navigation_Satellite_System | In September 2003, China intended to join the European Galileo positioning system project and was to invest €230 million (USD296 million, GBP160 million) in Galileo over the next few years. At the time, it was believed that China's "BeiDou" navigation system would then only be used by its armed forces. In October 2004,... | Which program says CGI founded in 2008? | {
"text": [],
"answer_start": []
} |
5acd3b1f07355d001abf39a8 | BeiDou_Navigation_Satellite_System | In September 2003, China intended to join the European Galileo positioning system project and was to invest €230 million (USD296 million, GBP160 million) in Galileo over the next few years. At the time, it was believed that China's "BeiDou" navigation system would then only be used by its armed forces. In October 2004,... | By April of 2006, how many cooperation projects between Japan and EU had been signed? | {
"text": [],
"answer_start": []
} |
56e105afcd28a01900c67449 | BeiDou_Navigation_Satellite_System | BeiDou-1 is an experimental regional navigation system, which consists of four satellites (three working satellites and one backup satellite). The satellites themselves were based on the Chinese DFH-3 geostationary communications satellite and had a launch weight of 1,000 kilograms (2,200 pounds) each. | What is the BeiDou-1? | {
"text": [
"an experimental regional navigation system"
],
"answer_start": [
12
]
} |
56e105afcd28a01900c6744a | BeiDou_Navigation_Satellite_System | BeiDou-1 is an experimental regional navigation system, which consists of four satellites (three working satellites and one backup satellite). The satellites themselves were based on the Chinese DFH-3 geostationary communications satellite and had a launch weight of 1,000 kilograms (2,200 pounds) each. | The BeiDou-1 is made up of how may satellites? | {
"text": [
"four"
],
"answer_start": [
74
]
} |
56e105afcd28a01900c6744b | BeiDou_Navigation_Satellite_System | BeiDou-1 is an experimental regional navigation system, which consists of four satellites (three working satellites and one backup satellite). The satellites themselves were based on the Chinese DFH-3 geostationary communications satellite and had a launch weight of 1,000 kilograms (2,200 pounds) each. | How many satellites in the BeiDou-1 system is used for back up? | {
"text": [
"one"
],
"answer_start": [
120
]
} |
56e105afcd28a01900c6744c | BeiDou_Navigation_Satellite_System | BeiDou-1 is an experimental regional navigation system, which consists of four satellites (three working satellites and one backup satellite). The satellites themselves were based on the Chinese DFH-3 geostationary communications satellite and had a launch weight of 1,000 kilograms (2,200 pounds) each. | What were the BeiDou-1 system satellites based on? | {
"text": [
"the Chinese DFH-3 geostationary communications satellite"
],
"answer_start": [
183
]
} |
56e105afcd28a01900c6744d | BeiDou_Navigation_Satellite_System | BeiDou-1 is an experimental regional navigation system, which consists of four satellites (three working satellites and one backup satellite). The satellites themselves were based on the Chinese DFH-3 geostationary communications satellite and had a launch weight of 1,000 kilograms (2,200 pounds) each. | How much did each satellite for the BeiDou-1 system weigh? | {
"text": [
"1,000 kilograms (2,200 pounds) each"
],
"answer_start": [
267
]
} |
5acd3c4d07355d001abf39b8 | BeiDou_Navigation_Satellite_System | BeiDou-1 is an experimental regional navigation system, which consists of four satellites (three working satellites and one backup satellite). The satellites themselves were based on the Chinese DFH-3 geostationary communications satellite and had a launch weight of 1,000 kilograms (2,200 pounds) each. | Which navigational system is regional and consists of five satellites? | {
"text": [],
"answer_start": []
} |
5acd3c4d07355d001abf39b9 | BeiDou_Navigation_Satellite_System | BeiDou-1 is an experimental regional navigation system, which consists of four satellites (three working satellites and one backup satellite). The satellites themselves were based on the Chinese DFH-3 geostationary communications satellite and had a launch weight of 1,000 kilograms (2,200 pounds) each. | The launch weight of what was over 3,000 pounds? | {
"text": [],
"answer_start": []
} |
5acd3c4d07355d001abf39ba | BeiDou_Navigation_Satellite_System | BeiDou-1 is an experimental regional navigation system, which consists of four satellites (three working satellites and one backup satellite). The satellites themselves were based on the Chinese DFH-3 geostationary communications satellite and had a launch weight of 1,000 kilograms (2,200 pounds) each. | BeiDou-1 consists of four working satellites and how many backups? | {
"text": [],
"answer_start": []
} |
5acd3c4d07355d001abf39bb | BeiDou_Navigation_Satellite_System | BeiDou-1 is an experimental regional navigation system, which consists of four satellites (three working satellites and one backup satellite). The satellites themselves were based on the Chinese DFH-3 geostationary communications satellite and had a launch weight of 1,000 kilograms (2,200 pounds) each. | BeiDou-1 consists of four backup satellites and how many working satellites? | {
"text": [],
"answer_start": []
} |
5acd3c4d07355d001abf39bc | BeiDou_Navigation_Satellite_System | BeiDou-1 is an experimental regional navigation system, which consists of four satellites (three working satellites and one backup satellite). The satellites themselves were based on the Chinese DFH-3 geostationary communications satellite and had a launch weight of 1,000 kilograms (2,200 pounds) each. | Which navigational system is national and consists of four satellites? | {
"text": [],
"answer_start": []
} |
56e106b3e3433e1400422af0 | BeiDou_Navigation_Satellite_System | Unlike the American GPS, Russian GLONASS, and European Galileo systems, which use medium Earth orbit satellites, BeiDou-1 uses satellites in geostationary orbit. This means that the system does not require a large constellation of satellites, but it also limits the coverage to areas on Earth where the satellites are vi... | What type of satellites does the American GPS system use? | {
"text": [
"medium Earth orbit satellites"
],
"answer_start": [
82
]
} |
56e106b3e3433e1400422af1 | BeiDou_Navigation_Satellite_System | Unlike the American GPS, Russian GLONASS, and European Galileo systems, which use medium Earth orbit satellites, BeiDou-1 uses satellites in geostationary orbit. This means that the system does not require a large constellation of satellites, but it also limits the coverage to areas on Earth where the satellites are vi... | What type of satellites does the BeiDou-1 system use? | {
"text": [
"satellites in geostationary orbit"
],
"answer_start": [
127
]
} |
56e106b3e3433e1400422af2 | BeiDou_Navigation_Satellite_System | Unlike the American GPS, Russian GLONASS, and European Galileo systems, which use medium Earth orbit satellites, BeiDou-1 uses satellites in geostationary orbit. This means that the system does not require a large constellation of satellites, but it also limits the coverage to areas on Earth where the satellites are vi... | What is the purpose of the BeiDou-1 system using stallites in geostationary orbit? | {
"text": [
"the system does not require a large constellation of satellites"
],
"answer_start": [
178
]
} |
56e106b3e3433e1400422af3 | BeiDou_Navigation_Satellite_System | Unlike the American GPS, Russian GLONASS, and European Galileo systems, which use medium Earth orbit satellites, BeiDou-1 uses satellites in geostationary orbit. This means that the system does not require a large constellation of satellites, but it also limits the coverage to areas on Earth where the satellites are vi... | What service area is covered by the BeiDou-1 system? | {
"text": [
"from longitude 70°E to 140°E and from latitude 5°N to 55°N"
],
"answer_start": [
360
]
} |
56e106b3e3433e1400422af4 | BeiDou_Navigation_Satellite_System | Unlike the American GPS, Russian GLONASS, and European Galileo systems, which use medium Earth orbit satellites, BeiDou-1 uses satellites in geostationary orbit. This means that the system does not require a large constellation of satellites, but it also limits the coverage to areas on Earth where the satellites are vi... | What is the frequency of the BeiDou-1 system? | {
"text": [
"2491.75 MHz"
],
"answer_start": [
449
]
} |
5acd3eef07355d001abf3a24 | BeiDou_Navigation_Satellite_System | Unlike the American GPS, Russian GLONASS, and European Galileo systems, which use medium Earth orbit satellites, BeiDou-1 uses satellites in geostationary orbit. This means that the system does not require a large constellation of satellites, but it also limits the coverage to areas on Earth where the satellites are vi... | BeiDou-1, along with American GPS, use which type of satellites? | {
"text": [],
"answer_start": []
} |
5acd3eef07355d001abf3a25 | BeiDou_Navigation_Satellite_System | Unlike the American GPS, Russian GLONASS, and European Galileo systems, which use medium Earth orbit satellites, BeiDou-1 uses satellites in geostationary orbit. This means that the system does not require a large constellation of satellites, but it also limits the coverage to areas on Earth where the satellites are vi... | BeiDou-1, along with Russian GLONASS, use which type of satellites? | {
"text": [],
"answer_start": []
} |
5acd3eef07355d001abf3a26 | BeiDou_Navigation_Satellite_System | Unlike the American GPS, Russian GLONASS, and European Galileo systems, which use medium Earth orbit satellites, BeiDou-1 uses satellites in geostationary orbit. This means that the system does not require a large constellation of satellites, but it also limits the coverage to areas on Earth where the satellites are vi... | BeiDou-1, along with European Galileo systems, use which type of satellites? | {
"text": [],
"answer_start": []
} |
5acd3eef07355d001abf3a27 | BeiDou_Navigation_Satellite_System | Unlike the American GPS, Russian GLONASS, and European Galileo systems, which use medium Earth orbit satellites, BeiDou-1 uses satellites in geostationary orbit. This means that the system does not require a large constellation of satellites, but it also limits the coverage to areas on Earth where the satellites are vi... | Which is a frequency of the vehicular system? | {
"text": [],
"answer_start": []
} |
5acd3eef07355d001abf3a28 | BeiDou_Navigation_Satellite_System | Unlike the American GPS, Russian GLONASS, and European Galileo systems, which use medium Earth orbit satellites, BeiDou-1 uses satellites in geostationary orbit. This means that the system does not require a large constellation of satellites, but it also limits the coverage to areas on Earth where the satellites are vi... | Although, BeiDou-1 uses medium Earth orbit satellites, American GPS systems use which kind? | {
"text": [],
"answer_start": []
} |
56e10745cd28a01900c6745f | BeiDou_Navigation_Satellite_System | The first satellite, BeiDou-1A, was launched on October 31, 2000. The second satellite, BeiDou-1B, was successfully launched on December 21, 2000. The last operational satellite of the constellation, BeiDou-1C, was launched on May 25, 2003. | When was the first satellite for the BeiDou-1 system launched? | {
"text": [
"October 31, 2000"
],
"answer_start": [
48
]
} |
56e10745cd28a01900c67460 | BeiDou_Navigation_Satellite_System | The first satellite, BeiDou-1A, was launched on October 31, 2000. The second satellite, BeiDou-1B, was successfully launched on December 21, 2000. The last operational satellite of the constellation, BeiDou-1C, was launched on May 25, 2003. | What was the first satellite for the BeiDou-1 system called? | {
"text": [
"BeiDou-1A"
],
"answer_start": [
21
]
} |
56e10745cd28a01900c67461 | BeiDou_Navigation_Satellite_System | The first satellite, BeiDou-1A, was launched on October 31, 2000. The second satellite, BeiDou-1B, was successfully launched on December 21, 2000. The last operational satellite of the constellation, BeiDou-1C, was launched on May 25, 2003. | When was the second satellite for the BeiDou-1 system launched? | {
"text": [
"December 21, 2000"
],
"answer_start": [
128
]
} |
56e10745cd28a01900c67462 | BeiDou_Navigation_Satellite_System | The first satellite, BeiDou-1A, was launched on October 31, 2000. The second satellite, BeiDou-1B, was successfully launched on December 21, 2000. The last operational satellite of the constellation, BeiDou-1C, was launched on May 25, 2003. | What was the second satellite for the BeiDou-1 system called? | {
"text": [
"BeiDou-1B"
],
"answer_start": [
88
]
} |
56e10745cd28a01900c67463 | BeiDou_Navigation_Satellite_System | The first satellite, BeiDou-1A, was launched on October 31, 2000. The second satellite, BeiDou-1B, was successfully launched on December 21, 2000. The last operational satellite of the constellation, BeiDou-1C, was launched on May 25, 2003. | When was the last satellite for the BeiDou-1 system launched? | {
"text": [
"May 25, 2003"
],
"answer_start": [
227
]
} |
5acd3f4f07355d001abf3a38 | BeiDou_Navigation_Satellite_System | The first satellite, BeiDou-1A, was launched on October 31, 2000. The second satellite, BeiDou-1B, was successfully launched on December 21, 2000. The last operational satellite of the constellation, BeiDou-1C, was launched on May 25, 2003. | In what year was the fifth and final satellite launched? | {
"text": [],
"answer_start": []
} |
5acd3f4f07355d001abf3a39 | BeiDou_Navigation_Satellite_System | The first satellite, BeiDou-1A, was launched on October 31, 2000. The second satellite, BeiDou-1B, was successfully launched on December 21, 2000. The last operational satellite of the constellation, BeiDou-1C, was launched on May 25, 2003. | In what month was the fourth and final satellite launched? | {
"text": [],
"answer_start": []
} |
5acd3f4f07355d001abf3a3a | BeiDou_Navigation_Satellite_System | The first satellite, BeiDou-1A, was launched on October 31, 2000. The second satellite, BeiDou-1B, was successfully launched on December 21, 2000. The last operational satellite of the constellation, BeiDou-1C, was launched on May 25, 2003. | In what year was the first satellite, BeiDou-1C, launched? | {
"text": [],
"answer_start": []
} |
5acd3f4f07355d001abf3a3b | BeiDou_Navigation_Satellite_System | The first satellite, BeiDou-1A, was launched on October 31, 2000. The second satellite, BeiDou-1B, was successfully launched on December 21, 2000. The last operational satellite of the constellation, BeiDou-1C, was launched on May 25, 2003. | In what month was the first satellite, BeiDou-1X, launched? | {
"text": [],
"answer_start": []
} |
5acd3f4f07355d001abf3a3c | BeiDou_Navigation_Satellite_System | The first satellite, BeiDou-1A, was launched on October 31, 2000. The second satellite, BeiDou-1B, was successfully launched on December 21, 2000. The last operational satellite of the constellation, BeiDou-1C, was launched on May 25, 2003. | The second satellite was named BeiDou-12b and was launched in December of what year? | {
"text": [],
"answer_start": []
} |
56e108e7cd28a01900c67487 | BeiDou_Navigation_Satellite_System | In 2007, the official Xinhua News Agency reported that the resolution of the BeiDou system was as high as 0.5 metres. With the existing user terminals it appears that the calibrated accuracy is 20m (100m, uncalibrated). | In 2007, what was the reported resolution of the BeiDou system? | {
"text": [
"as high as 0.5 metres"
],
"answer_start": [
95
]
} |
56e108e7cd28a01900c67488 | BeiDou_Navigation_Satellite_System | In 2007, the official Xinhua News Agency reported that the resolution of the BeiDou system was as high as 0.5 metres. With the existing user terminals it appears that the calibrated accuracy is 20m (100m, uncalibrated). | What is the calibrated accuracy of the BeiDou system? | {
"text": [
"20m"
],
"answer_start": [
194
]
} |
56e108e7cd28a01900c67489 | BeiDou_Navigation_Satellite_System | In 2007, the official Xinhua News Agency reported that the resolution of the BeiDou system was as high as 0.5 metres. With the existing user terminals it appears that the calibrated accuracy is 20m (100m, uncalibrated). | What is the uncalibrated accuracy of the BeiDou system? | {
"text": [
"100m"
],
"answer_start": [
199
]
} |
56e108e7cd28a01900c6748a | BeiDou_Navigation_Satellite_System | In 2007, the official Xinhua News Agency reported that the resolution of the BeiDou system was as high as 0.5 metres. With the existing user terminals it appears that the calibrated accuracy is 20m (100m, uncalibrated). | Who reported the resolution of the BeiDou system in 2007? | {
"text": [
"the official Xinhua News Agency"
],
"answer_start": [
9
]
} |
5acd414c07355d001abf3a92 | BeiDou_Navigation_Satellite_System | In 2007, the official Xinhua News Agency reported that the resolution of the BeiDou system was as high as 0.5 metres. With the existing user terminals it appears that the calibrated accuracy is 20m (100m, uncalibrated). | According to which news agency was the BeiDou resolution as high as .7 metres? | {
"text": [],
"answer_start": []
} |
5acd414c07355d001abf3a93 | BeiDou_Navigation_Satellite_System | In 2007, the official Xinhua News Agency reported that the resolution of the BeiDou system was as high as 0.5 metres. With the existing user terminals it appears that the calibrated accuracy is 20m (100m, uncalibrated). | In 2008, the XinHuang News Agency reported the resolution of the BeiDou System as how high? | {
"text": [],
"answer_start": []
} |
5acd414c07355d001abf3a94 | BeiDou_Navigation_Satellite_System | In 2007, the official Xinhua News Agency reported that the resolution of the BeiDou system was as high as 0.5 metres. With the existing user terminals it appears that the calibrated accuracy is 20m (100m, uncalibrated). | There are no terminals, but the calibration accuracy is still what? | {
"text": [],
"answer_start": []
} |
5acd414c07355d001abf3a95 | BeiDou_Navigation_Satellite_System | In 2007, the official Xinhua News Agency reported that the resolution of the BeiDou system was as high as 0.5 metres. With the existing user terminals it appears that the calibrated accuracy is 20m (100m, uncalibrated). | According to which news agency was the BeiDou-1X monitor resolution as high as .08 metres? | {
"text": [],
"answer_start": []
} |
5acd414c07355d001abf3a96 | BeiDou_Navigation_Satellite_System | In 2007, the official Xinhua News Agency reported that the resolution of the BeiDou system was as high as 0.5 metres. With the existing user terminals it appears that the calibrated accuracy is 20m (100m, uncalibrated). | What is the uncalibrated accuracy of the BeiDou second generation system? | {
"text": [],
"answer_start": []
} |
56e109accd28a01900c67497 | BeiDou_Navigation_Satellite_System | In 2008, a BeiDou-1 ground terminal cost around CN¥20,000RMB (US$2,929), almost 10 times the price of a contemporary GPS terminal. The price of the terminals was explained as being due to the cost of imported microchips. At the China High-Tech Fair ELEXCON of November 2009 in Shenzhen, a BeiDou terminal priced at CN¥3,... | How much did a BeiDou-1 ground terminal cost in 2008? | {
"text": [
"around CN¥20,000RMB (US$2,929)"
],
"answer_start": [
41
]
} |
56e109accd28a01900c67498 | BeiDou_Navigation_Satellite_System | In 2008, a BeiDou-1 ground terminal cost around CN¥20,000RMB (US$2,929), almost 10 times the price of a contemporary GPS terminal. The price of the terminals was explained as being due to the cost of imported microchips. At the China High-Tech Fair ELEXCON of November 2009 in Shenzhen, a BeiDou terminal priced at CN¥3,... | How much more did a BeiDou-1 ground terminal cost than a current GPS terminal? | {
"text": [
"almost 10 times the price"
],
"answer_start": [
73
]
} |
56e109accd28a01900c67499 | BeiDou_Navigation_Satellite_System | In 2008, a BeiDou-1 ground terminal cost around CN¥20,000RMB (US$2,929), almost 10 times the price of a contemporary GPS terminal. The price of the terminals was explained as being due to the cost of imported microchips. At the China High-Tech Fair ELEXCON of November 2009 in Shenzhen, a BeiDou terminal priced at CN¥3,... | Why is a BeiDou-1 ground terminal so expensive? | {
"text": [
"due to the cost of imported microchips"
],
"answer_start": [
181
]
} |
56e109accd28a01900c6749a | BeiDou_Navigation_Satellite_System | In 2008, a BeiDou-1 ground terminal cost around CN¥20,000RMB (US$2,929), almost 10 times the price of a contemporary GPS terminal. The price of the terminals was explained as being due to the cost of imported microchips. At the China High-Tech Fair ELEXCON of November 2009 in Shenzhen, a BeiDou terminal priced at CN¥3,... | Where was the ELEXCON fair held in 2009? | {
"text": [
"Shenzhen"
],
"answer_start": [
277
]
} |
56e109accd28a01900c6749b | BeiDou_Navigation_Satellite_System | In 2008, a BeiDou-1 ground terminal cost around CN¥20,000RMB (US$2,929), almost 10 times the price of a contemporary GPS terminal. The price of the terminals was explained as being due to the cost of imported microchips. At the China High-Tech Fair ELEXCON of November 2009 in Shenzhen, a BeiDou terminal priced at CN¥3,... | What was presented at the ELEXCON fair in 2009? | {
"text": [
"a BeiDou terminal priced at CN¥3,000RMB"
],
"answer_start": [
287
]
} |
5acd427007355d001abf3ad4 | BeiDou_Navigation_Satellite_System | In 2008, a BeiDou-1 ground terminal cost around CN¥20,000RMB (US$2,929), almost 10 times the price of a contemporary GPS terminal. The price of the terminals was explained as being due to the cost of imported microchips. At the China High-Tech Fair ELEXCON of November 2009 in Shenzhen, a BeiDou terminal priced at CN¥3,... | In what year was the price of a BeiDou-1 ground terminal $250 USD? | {
"text": [],
"answer_start": []
} |
5acd427007355d001abf3ad5 | BeiDou_Navigation_Satellite_System | In 2008, a BeiDou-1 ground terminal cost around CN¥20,000RMB (US$2,929), almost 10 times the price of a contemporary GPS terminal. The price of the terminals was explained as being due to the cost of imported microchips. At the China High-Tech Fair ELEXCON of November 2009 in Shenzhen, a BeiDou terminal priced at CN¥3,... | The price of the port was a result of the cost of what? | {
"text": [],
"answer_start": []
} |
5acd427007355d001abf3ad6 | BeiDou_Navigation_Satellite_System | In 2008, a BeiDou-1 ground terminal cost around CN¥20,000RMB (US$2,929), almost 10 times the price of a contemporary GPS terminal. The price of the terminals was explained as being due to the cost of imported microchips. At the China High-Tech Fair ELEXCON of November 2009 in Shenzhen, a BeiDou terminal priced at CN¥3,... | The price of what was a result of imported macro chips? | {
"text": [],
"answer_start": []
} |
5acd427007355d001abf3ad7 | BeiDou_Navigation_Satellite_System | In 2008, a BeiDou-1 ground terminal cost around CN¥20,000RMB (US$2,929), almost 10 times the price of a contemporary GPS terminal. The price of the terminals was explained as being due to the cost of imported microchips. At the China High-Tech Fair ELEXCON of November 2009 in Shenzhen, a BeiDou terminal priced at CN¥3,... | The price of what was a result of the price of motherboards? | {
"text": [],
"answer_start": []
} |
5acd427007355d001abf3ad8 | BeiDou_Navigation_Satellite_System | In 2008, a BeiDou-1 ground terminal cost around CN¥20,000RMB (US$2,929), almost 10 times the price of a contemporary GPS terminal. The price of the terminals was explained as being due to the cost of imported microchips. At the China High-Tech Fair ELEXCON of November 2009 in Shenzhen, a BeiDou terminal priced at CN¥3,... | Where was there a terminal priced over CNY2,000RMB? | {
"text": [],
"answer_start": []
} |
56e10a27cd28a01900c674ab | BeiDou_Navigation_Satellite_System | According to Sun Jiadong, the chief designer of the navigation system, "Many organizations have been using our system for a while, and they like it very much." | Who is the chief designer of the BeiDou navigation system? | {
"text": [
"Sun Jiadong"
],
"answer_start": [
13
]
} |
56e10a27cd28a01900c674ac | BeiDou_Navigation_Satellite_System | According to Sun Jiadong, the chief designer of the navigation system, "Many organizations have been using our system for a while, and they like it very much." | What did Sun Jiadong have to say about the BeiDou navigation system? | {
"text": [
"\"Many organizations have been using our system for a while, and they like it very much.\""
],
"answer_start": [
71
]
} |
56e10a27cd28a01900c674ad | BeiDou_Navigation_Satellite_System | According to Sun Jiadong, the chief designer of the navigation system, "Many organizations have been using our system for a while, and they like it very much." | Who is Sun Jiadong? | {
"text": [
"the chief designer of the navigation system"
],
"answer_start": [
26
]
} |
5acd440307355d001abf3b32 | BeiDou_Navigation_Satellite_System | According to Sun Jiadong, the chief designer of the navigation system, "Many organizations have been using our system for a while, and they like it very much." | Who says that many organizations dislike the system? | {
"text": [],
"answer_start": []
} |
5acd440307355d001abf3b33 | BeiDou_Navigation_Satellite_System | According to Sun Jiadong, the chief designer of the navigation system, "Many organizations have been using our system for a while, and they like it very much." | Moon Jiadong says that many organizations have been doing what? | {
"text": [],
"answer_start": []
} |
5acd440307355d001abf3b34 | BeiDou_Navigation_Satellite_System | According to Sun Jiadong, the chief designer of the navigation system, "Many organizations have been using our system for a while, and they like it very much." | According to the CEO, how do many organizations feel about the system? | {
"text": [],
"answer_start": []
} |
5acd440307355d001abf3b35 | BeiDou_Navigation_Satellite_System | According to Sun Jiadong, the chief designer of the navigation system, "Many organizations have been using our system for a while, and they like it very much." | Who is quoted as saying not many organizations have used the system? | {
"text": [],
"answer_start": []
} |
56e10ac2cd28a01900c674b9 | BeiDou_Navigation_Satellite_System | BeiDou-2 (formerly known as COMPASS) is not an extension to the older BeiDou-1, but rather supersedes it outright. The new system will be a constellation of 35 satellites, which include 5 geostationary orbit satellites for backward compatibility with BeiDou-1, and 30 non-geostationary satellites (27 in medium Earth orb... | What was the BeiDou-2 system previously known as? | {
"text": [
"COMPASS"
],
"answer_start": [
28
]
} |
56e10ac2cd28a01900c674ba | BeiDou_Navigation_Satellite_System | BeiDou-2 (formerly known as COMPASS) is not an extension to the older BeiDou-1, but rather supersedes it outright. The new system will be a constellation of 35 satellites, which include 5 geostationary orbit satellites for backward compatibility with BeiDou-1, and 30 non-geostationary satellites (27 in medium Earth orb... | How may satellites will the BeiDou-2 system have? | {
"text": [
"35"
],
"answer_start": [
157
]
} |
56e10ac2cd28a01900c674bb | BeiDou_Navigation_Satellite_System | BeiDou-2 (formerly known as COMPASS) is not an extension to the older BeiDou-1, but rather supersedes it outright. The new system will be a constellation of 35 satellites, which include 5 geostationary orbit satellites for backward compatibility with BeiDou-1, and 30 non-geostationary satellites (27 in medium Earth orb... | How many geostationary orbit satellites will the BeiDou-2 system have? | {
"text": [
"5"
],
"answer_start": [
158
]
} |
56e10ac2cd28a01900c674bc | BeiDou_Navigation_Satellite_System | BeiDou-2 (formerly known as COMPASS) is not an extension to the older BeiDou-1, but rather supersedes it outright. The new system will be a constellation of 35 satellites, which include 5 geostationary orbit satellites for backward compatibility with BeiDou-1, and 30 non-geostationary satellites (27 in medium Earth orb... | How many non-geostationary orbit satellites will the BeiDou-2 system have? | {
"text": [
"30"
],
"answer_start": [
265
]
} |
56e10ac2cd28a01900c674bd | BeiDou_Navigation_Satellite_System | BeiDou-2 (formerly known as COMPASS) is not an extension to the older BeiDou-1, but rather supersedes it outright. The new system will be a constellation of 35 satellites, which include 5 geostationary orbit satellites for backward compatibility with BeiDou-1, and 30 non-geostationary satellites (27 in medium Earth orb... | What is the purpose of the geostationary orbit satellites in the BeiDou-2 system? | {
"text": [
"for backward compatibility with BeiDou-1"
],
"answer_start": [
219
]
} |
5acd449507355d001abf3b56 | BeiDou_Navigation_Satellite_System | BeiDou-2 (formerly known as COMPASS) is not an extension to the older BeiDou-1, but rather supersedes it outright. The new system will be a constellation of 35 satellites, which include 5 geostationary orbit satellites for backward compatibility with BeiDou-1, and 30 non-geostationary satellites (27 in medium Earth orb... | What was BeiDou-3 formerly known as? | {
"text": [],
"answer_start": []
} |
5acd449507355d001abf3b57 | BeiDou_Navigation_Satellite_System | BeiDou-2 (formerly known as COMPASS) is not an extension to the older BeiDou-1, but rather supersedes it outright. The new system will be a constellation of 35 satellites, which include 5 geostationary orbit satellites for backward compatibility with BeiDou-1, and 30 non-geostationary satellites (27 in medium Earth orb... | MAPS is the former name of which satellite? | {
"text": [],
"answer_start": []
} |
5acd449507355d001abf3b58 | BeiDou_Navigation_Satellite_System | BeiDou-2 (formerly known as COMPASS) is not an extension to the older BeiDou-1, but rather supersedes it outright. The new system will be a constellation of 35 satellites, which include 5 geostationary orbit satellites for backward compatibility with BeiDou-1, and 30 non-geostationary satellites (27 in medium Earth orb... | Which system will consist of 40 satellites? | {
"text": [],
"answer_start": []
} |
5acd449507355d001abf3b59 | BeiDou_Navigation_Satellite_System | BeiDou-2 (formerly known as COMPASS) is not an extension to the older BeiDou-1, but rather supersedes it outright. The new system will be a constellation of 35 satellites, which include 5 geostationary orbit satellites for backward compatibility with BeiDou-1, and 30 non-geostationary satellites (27 in medium Earth orb... | The old system will consist of how many non-geostationary satellites satellites? | {
"text": [],
"answer_start": []
} |
56e10dbdcd28a01900c674e1 | BeiDou_Navigation_Satellite_System | The ranging signals are based on the CDMA principle and have complex structure typical of Galileo or modernized GPS. Similar to the other GNSS, there will be two levels of positioning service: open and restricted (military). The public service shall be available globally to general users. When all the currently planned... | What are the ranging signals of the BeiDou system based on? | {
"text": [
"the CDMA principle"
],
"answer_start": [
33
]
} |
56e10dbdcd28a01900c674e2 | BeiDou_Navigation_Satellite_System | The ranging signals are based on the CDMA principle and have complex structure typical of Galileo or modernized GPS. Similar to the other GNSS, there will be two levels of positioning service: open and restricted (military). The public service shall be available globally to general users. When all the currently planned... | What positioning levels will the BeiDou system offer? | {
"text": [
"open and restricted (military)"
],
"answer_start": [
193
]
} |
56e10dbdcd28a01900c674e3 | BeiDou_Navigation_Satellite_System | The ranging signals are based on the CDMA principle and have complex structure typical of Galileo or modernized GPS. Similar to the other GNSS, there will be two levels of positioning service: open and restricted (military). The public service shall be available globally to general users. When all the currently planned... | Where will the public service for the BeiDou system be available? | {
"text": [
"globally to general users"
],
"answer_start": [
263
]
} |
56e10dbdcd28a01900c674e4 | BeiDou_Navigation_Satellite_System | The ranging signals are based on the CDMA principle and have complex structure typical of Galileo or modernized GPS. Similar to the other GNSS, there will be two levels of positioning service: open and restricted (military). The public service shall be available globally to general users. When all the currently planned... | Who designed the COMPASS navigation system? | {
"text": [
"Sun Jiadong"
],
"answer_start": [
617
]
} |
56e10dbdcd28a01900c674e5 | BeiDou_Navigation_Satellite_System | The ranging signals are based on the CDMA principle and have complex structure typical of Galileo or modernized GPS. Similar to the other GNSS, there will be two levels of positioning service: open and restricted (military). The public service shall be available globally to general users. When all the currently planned... | How many satellites will the COMPASS navigation system use? | {
"text": [
"75+ satellites"
],
"answer_start": [
412
]
} |
5acd455207355d001abf3b88 | BeiDou_Navigation_Satellite_System | The ranging signals are based on the CDMA principle and have complex structure typical of Galileo or modernized GPS. Similar to the other GNSS, there will be two levels of positioning service: open and restricted (military). The public service shall be available globally to general users. When all the currently planned... | Which signals are based on the ABCD principle? | {
"text": [],
"answer_start": []
} |
5acd455207355d001abf3b89 | BeiDou_Navigation_Satellite_System | The ranging signals are based on the CDMA principle and have complex structure typical of Galileo or modernized GPS. Similar to the other GNSS, there will be two levels of positioning service: open and restricted (military). The public service shall be available globally to general users. When all the currently planned... | The ranging signals have a simple structure and are based on which principle? | {
"text": [],
"answer_start": []
} |
5acd455207355d001abf3b8a | BeiDou_Navigation_Satellite_System | The ranging signals are based on the CDMA principle and have complex structure typical of Galileo or modernized GPS. Similar to the other GNSS, there will be two levels of positioning service: open and restricted (military). The public service shall be available globally to general users. When all the currently planned... | The ranging signals, based on the Galileo principle, have what type of structure? | {
"text": [],
"answer_start": []
} |
5acd455207355d001abf3b8b | BeiDou_Navigation_Satellite_System | The ranging signals are based on the CDMA principle and have complex structure typical of Galileo or modernized GPS. Similar to the other GNSS, there will be two levels of positioning service: open and restricted (military). The public service shall be available globally to general users. When all the currently planned... | Who designed the COMPASS international trade system? | {
"text": [],
"answer_start": []
} |
5acd455207355d001abf3b8c | BeiDou_Navigation_Satellite_System | The ranging signals are based on the CDMA principle and have complex structure typical of Galileo or modernized GPS. Similar to the other GNSS, there will be two levels of positioning service: open and restricted (military). The public service shall be available globally to general users. When all the currently planned... | Which system is the predecessor of the GNSS system? | {
"text": [],
"answer_start": []
} |
56e10ed0cd28a01900c674f5 | BeiDou_Navigation_Satellite_System | There are two levels of service provided — a free service to civilians and licensed service to the Chinese government and military. The free civilian service has a 10-meter location-tracking accuracy, synchronizes clocks with an accuracy of 10 nanoseconds, and measures speeds to within 0.2 m/s. The restricted military ... | What types of services will be offered by the BeiDou system? | {
"text": [
"a free service to civilians and licensed service to the Chinese government and military"
],
"answer_start": [
43
]
} |
56e10ed0cd28a01900c674f6 | BeiDou_Navigation_Satellite_System | There are two levels of service provided — a free service to civilians and licensed service to the Chinese government and military. The free civilian service has a 10-meter location-tracking accuracy, synchronizes clocks with an accuracy of 10 nanoseconds, and measures speeds to within 0.2 m/s. The restricted military ... | What is the range of accuracy for the free service offered to civilians? | {
"text": [
"10-meter location-tracking accuracy"
],
"answer_start": [
164
]
} |
56e10ed0cd28a01900c674f7 | BeiDou_Navigation_Satellite_System | There are two levels of service provided — a free service to civilians and licensed service to the Chinese government and military. The free civilian service has a 10-meter location-tracking accuracy, synchronizes clocks with an accuracy of 10 nanoseconds, and measures speeds to within 0.2 m/s. The restricted military ... | What is the range of accuracy for the licensed service used by Chinese government and military? | {
"text": [
"10 centimetres"
],
"answer_start": [
355
]
} |
56e10ed0cd28a01900c674f8 | BeiDou_Navigation_Satellite_System | There are two levels of service provided — a free service to civilians and licensed service to the Chinese government and military. The free civilian service has a 10-meter location-tracking accuracy, synchronizes clocks with an accuracy of 10 nanoseconds, and measures speeds to within 0.2 m/s. The restricted military ... | As of right now, who uses the licensed military service? | {
"text": [
"the People's Liberation Army and to the Military of Pakistan"
],
"answer_start": [
522
]
} |
56e10ed0cd28a01900c674f9 | BeiDou_Navigation_Satellite_System | There are two levels of service provided — a free service to civilians and licensed service to the Chinese government and military. The free civilian service has a 10-meter location-tracking accuracy, synchronizes clocks with an accuracy of 10 nanoseconds, and measures speeds to within 0.2 m/s. The restricted military ... | What is something the licensed military service can be used for? | {
"text": [
"communication"
],
"answer_start": [
387
]
} |
5acd460607355d001abf3ba4 | BeiDou_Navigation_Satellite_System | There are two levels of service provided — a free service to civilians and licensed service to the Chinese government and military. The free civilian service has a 10-meter location-tracking accuracy, synchronizes clocks with an accuracy of 10 nanoseconds, and measures speeds to within 0.2 m/s. The restricted military ... | Aside from the charged service to civilians, what is the other level of service provided? | {
"text": [],
"answer_start": []
} |
5acd460607355d001abf3ba5 | BeiDou_Navigation_Satellite_System | There are two levels of service provided — a free service to civilians and licensed service to the Chinese government and military. The free civilian service has a 10-meter location-tracking accuracy, synchronizes clocks with an accuracy of 10 nanoseconds, and measures speeds to within 0.2 m/s. The restricted military ... | Aside from the licensed service to Japanese civilians, what is the other level of service provided? | {
"text": [],
"answer_start": []
} |
5acd460607355d001abf3ba6 | BeiDou_Navigation_Satellite_System | There are two levels of service provided — a free service to civilians and licensed service to the Chinese government and military. The free civilian service has a 10-meter location-tracking accuracy, synchronizes clocks with an accuracy of 10 nanoseconds, and measures speeds to within 0.2 m/s. The restricted military ... | The paid civilian service offers which features? | {
"text": [],
"answer_start": []
} |
5acd460607355d001abf3ba7 | BeiDou_Navigation_Satellite_System | There are two levels of service provided — a free service to civilians and licensed service to the Chinese government and military. The free civilian service has a 10-meter location-tracking accuracy, synchronizes clocks with an accuracy of 10 nanoseconds, and measures speeds to within 0.2 m/s. The restricted military ... | The service licensed to Japanese government has a location accuracy of what? | {
"text": [],
"answer_start": []
} |
5acd460607355d001abf3ba8 | BeiDou_Navigation_Satellite_System | There are two levels of service provided — a free service to civilians and licensed service to the Chinese government and military. The free civilian service has a 10-meter location-tracking accuracy, synchronizes clocks with an accuracy of 10 nanoseconds, and measures speeds to within 0.2 m/s. The restricted military ... | The paid civilian service has a location tracking accuracy of how many meters? | {
"text": [],
"answer_start": []
} |
56e10feecd28a01900c67513 | BeiDou_Navigation_Satellite_System | Frequencies for COMPASS are allocated in four bands: E1, E2, E5B, and E6 and overlap with Galileo. The fact of overlapping could be convenient from the point of view of the receiver design, but on the other hand raises the issues of inter-system interference, especially within E1 and E2 bands, which are allocated for G... | How many frequencies does the COMPASS system use? | {
"text": [
"four bands"
],
"answer_start": [
41
]
} |
56e10feecd28a01900c67514 | BeiDou_Navigation_Satellite_System | Frequencies for COMPASS are allocated in four bands: E1, E2, E5B, and E6 and overlap with Galileo. The fact of overlapping could be convenient from the point of view of the receiver design, but on the other hand raises the issues of inter-system interference, especially within E1 and E2 bands, which are allocated for G... | What are the four bands of frequencies used by the COMPASS system called? | {
"text": [
"E1, E2, E5B, and E6"
],
"answer_start": [
53
]
} |
56e10feecd28a01900c67515 | BeiDou_Navigation_Satellite_System | Frequencies for COMPASS are allocated in four bands: E1, E2, E5B, and E6 and overlap with Galileo. The fact of overlapping could be convenient from the point of view of the receiver design, but on the other hand raises the issues of inter-system interference, especially within E1 and E2 bands, which are allocated for G... | Which frequency bands are most likely to cause issues of inter-system interference with the Galileo system? | {
"text": [
"E1 and E2"
],
"answer_start": [
278
]
} |
56e10feecd28a01900c67516 | BeiDou_Navigation_Satellite_System | Frequencies for COMPASS are allocated in four bands: E1, E2, E5B, and E6 and overlap with Galileo. The fact of overlapping could be convenient from the point of view of the receiver design, but on the other hand raises the issues of inter-system interference, especially within E1 and E2 bands, which are allocated for G... | Which bands are used by the Galileo system for their public service? | {
"text": [
"E1 and E2"
],
"answer_start": [
278
]
} |
56e10feecd28a01900c67517 | BeiDou_Navigation_Satellite_System | Frequencies for COMPASS are allocated in four bands: E1, E2, E5B, and E6 and overlap with Galileo. The fact of overlapping could be convenient from the point of view of the receiver design, but on the other hand raises the issues of inter-system interference, especially within E1 and E2 bands, which are allocated for G... | According to International Telecommunication Union (ITU) policies, who is given higher priority to a specific frequency band? | {
"text": [
"the first nation to start broadcasting in a specific frequency"
],
"answer_start": [
426
]
} |
5acd46c207355d001abf3bc2 | BeiDou_Navigation_Satellite_System | Frequencies for COMPASS are allocated in four bands: E1, E2, E5B, and E6 and overlap with Galileo. The fact of overlapping could be convenient from the point of view of the receiver design, but on the other hand raises the issues of inter-system interference, especially within E1 and E2 bands, which are allocated for G... | Frequencies for COMPASS overlap with Genesis and are allocated in how many bands? | {
"text": [],
"answer_start": []
} |
5acd46c207355d001abf3bc3 | BeiDou_Navigation_Satellite_System | Frequencies for COMPASS are allocated in four bands: E1, E2, E5B, and E6 and overlap with Galileo. The fact of overlapping could be convenient from the point of view of the receiver design, but on the other hand raises the issues of inter-system interference, especially within E1 and E2 bands, which are allocated for G... | Which countries satellites will transmit in E3 before Galileo satellites? | {
"text": [],
"answer_start": []
} |
5acd46c207355d001abf3bc4 | BeiDou_Navigation_Satellite_System | Frequencies for COMPASS are allocated in four bands: E1, E2, E5B, and E6 and overlap with Galileo. The fact of overlapping could be convenient from the point of view of the receiver design, but on the other hand raises the issues of inter-system interference, especially within E1 and E2 bands, which are allocated for G... | Which countries satellites will transmit in E3 before COMPASS satellites? | {
"text": [],
"answer_start": []
} |
5acd46c207355d001abf3bc5 | BeiDou_Navigation_Satellite_System | Frequencies for COMPASS are allocated in four bands: E1, E2, E5B, and E6 and overlap with Galileo. The fact of overlapping could be convenient from the point of view of the receiver design, but on the other hand raises the issues of inter-system interference, especially within E1 and E2 bands, which are allocated for G... | Frequencies for NASA are allocated in how many bands? | {
"text": [],
"answer_start": []
} |
5acd46c207355d001abf3bc6 | BeiDou_Navigation_Satellite_System | Frequencies for COMPASS are allocated in four bands: E1, E2, E5B, and E6 and overlap with Galileo. The fact of overlapping could be convenient from the point of view of the receiver design, but on the other hand raises the issues of inter-system interference, especially within E1 and E2 bands, which are allocated for G... | Aside from B3, E1 and E34, what is the other band of frequency used by COMPASS? | {
"text": [],
"answer_start": []
} |
56e113edcd28a01900c67569 | BeiDou_Navigation_Satellite_System | Although little was officially announced by Chinese authorities about the signals of the new system, the launch of the first COMPASS satellite permitted independent researchers not only to study general characteristics of the signals, but even to build a COMPASS receiver. | How much information about the COMPASS system did Chinese authorities release? | {
"text": [
"little was officially announced"
],
"answer_start": [
9
]
} |
56e113edcd28a01900c6756a | BeiDou_Navigation_Satellite_System | Although little was officially announced by Chinese authorities about the signals of the new system, the launch of the first COMPASS satellite permitted independent researchers not only to study general characteristics of the signals, but even to build a COMPASS receiver. | What is one thing launching the first COMPASS satellite enable researchers to do? | {
"text": [
"to study general characteristics of the signals"
],
"answer_start": [
186
]
} |
56e113edcd28a01900c6756b | BeiDou_Navigation_Satellite_System | Although little was officially announced by Chinese authorities about the signals of the new system, the launch of the first COMPASS satellite permitted independent researchers not only to study general characteristics of the signals, but even to build a COMPASS receiver. | What is another thing launching the first COMPASS satellite enable researchers to do? | {
"text": [
"to build a COMPASS receiver"
],
"answer_start": [
244
]
} |
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