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index_no
int64
70
63.1k
port_name
stringlengths
3
35
country
stringclasses
194 values
latitude
float64
-77.85
78.9
longitude
float64
-177.37
179
no2_footprint_days
int64
6
31
co_footprint_days
int64
25
31
ch4_footprint_days
int64
25
31
hcho_footprint_days
int64
25
31
o3_footprint_days
int64
6
31
so2_catalog_items
int64
0
0
satellite_catalog_score
float64
59.4
100
satellite_score_meaning
stringclasses
1 value
no2_epa_valid_days_50km
float64
0
31
⌀
no2_epa_best_site_km
float64
0.6
49.1
⌀
no2_epa_best_site_id
stringclasses
74 values
so2_epa_valid_days_50km
float64
0
31
⌀
so2_epa_best_site_km
float64
0.6
49.3
⌀
so2_epa_best_site_id
stringclasses
85 values
co_epa_valid_days_50km
float64
0
31
⌀
co_epa_best_site_km
float64
1.2
49.3
⌀
co_epa_best_site_id
stringclasses
51 values
o3_epa_valid_days_50km
float64
0
31
⌀
o3_epa_best_site_km
float64
0.5
49.9
⌀
o3_epa_best_site_id
stringclasses
165 values
epa_surface_score
float64
0
100
⌀
epa_scope
stringclasses
2 values
61,090
SHAKOTAN
RU
43.866667
146.833333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
61,110
MOMBETSU KO
JP
44.35
143.35
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
5,750
CHARLOTTETOWN
CA
46.233333
-63.133333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
61,120
ABASHIRI KO
JP
44.016667
144.283333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
61,130
NEMURO KO
JP
43.333333
145.583333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
61,140
HANASAKI KO
JP
43.283333
145.583333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
61,160
KUSHIRO KO
JP
42.983333
144.366667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
61,165
TOMAKOMAI KO
JP
42.633333
141.633333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
61,170
MURORAN KO
JP
42.35
140.966667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
61,180
MORI
JP
42.116667
140.583333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
49,500
GOPALPUR
IN
19.25
84.916667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
47,990
EL GHARDAQA
EG
27.216667
33.85
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
48,015
RAS SHUKHIER
EG
28.133333
33.283333
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
48,020
RAS GHARIB
EG
28.35
33.1
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
48,040
AS SUWAYS
EG
29.966667
32.55
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
48,045
EL-ADABIYA
EG
29.866667
32.466667
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
48,050
EL ISMAILIYA
EG
30.583333
32.283333
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
48,060
RAS ABU ZANIMAH
EG
29.033333
33.116667
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
48,065
WADI FEIRAN
EG
28.75
33.2
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
48,076
ELAT
IL
29.55
34.95
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
48,090
AL AQABAH
JO
29.516667
35
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
48,120
YANBU
SA
24.083333
38.05
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
48,140
JIDDAH
SA
21.483333
39.183333
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
48,142
JIZAN
SA
16.9
42.483333
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
46,780
SIMONSTOWN
ZA
-34.183333
18.433333
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
46,800
MOSSEL BAY
ZA
-34.183333
22.15
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
46,820
PORT ELIZABETH
ZA
-33.966667
25.616667
31
30
30
30
31
0
98.1
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
33,770
BELFAST
GB
54.616667
-5.9
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
33,790
LARNE
GB
54.85
-5.8
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
33,820
COLERAINE
GB
55.133333
-6.666667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
33,830
LONDONDERRY
GB
55
-7.316667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
33,060
ORNSAY
GB
57.15
-5.8
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,290
BUCKIE HARBOR
GB
57.683333
-2.966667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,300
LOSSIEMOUTH
GB
57.716667
-3.283333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,320
BURGHEAD
GB
57.7
-3.5
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,330
INVERNESS
GB
57.483333
-4.233333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,340
CROMARTY
GB
57.683333
-4.033333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,350
INVERGORDON
GB
57.683333
-4.166667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,360
PORTMAHOMACK HARBOR
GB
57.833333
-3.833333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,370
HELMSDALE HARBOR
GB
58.116667
-3.65
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,380
WICK
GB
58.433333
-3.083333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,410
PIEROWALL
GB
59.3
-2.983333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,420
KETTLETOFT
GB
59.233333
-2.6
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,430
WHITEHALL
GB
59.133333
-2.6
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,440
KIRKWALL
GB
58.983333
-2.966667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,450
STROMNESS
GB
58.966667
-3.3
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,460
SOUTH NESS
GB
58.8
-3.2
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,470
ST MARGARETS HOPE
GB
58.833333
-2.95
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,490
LYNESS
GB
58.833333
-3.2
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
32,500
SCAPA BAY
GB
58.95
-2.983333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
4,800
CHICAGO
US
41.883333
-87.6
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
31
7.3
17-031-0219
31
17.4
17-031-0076
31
34.1
17-031-0119
31
13
17-031-4002
100
screened; 50km; daily observation percent >=75
4,810
WILMETTE
US
42.083333
-87.683333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
31
11.4
17-031-4201
31
11.4
17-031-4201
28
11.4
17-031-4201
31
2.5
17-031-7002
97.6
screened; 50km; daily observation percent >=75
4,820
GREAT LAKES
US
42.3
-87.833333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
31
18
17-031-4201
31
18
17-031-4201
28
18
17-031-4201
31
18.6
17-097-1007
97.6
screened; 50km; daily observation percent >=75
4,830
WAUKEGAN
US
42.366667
-87.816667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
31
15.4
55-059-0019
31
25.2
17-031-4201
28
25.2
17-031-4201
31
11.1
17-097-1007
97.6
screened; 50km; daily observation percent >=75
4,840
KENOSHA
US
42.583333
-87.816667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
31
8.8
55-059-0019
31
49.3
17-031-4201
31
40
55-079-0056
31
5.8
55-059-0025
100
screened; 50km; daily observation percent >=75
4,850
RACINE
US
42.733333
-87.783333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
31
25.3
55-079-0056
31
41.3
55-079-0068
31
25.3
55-079-0056
31
5
55-101-0020
100
screened; 50km; daily observation percent >=75
4,860
MILWAUKEE
US
43.033333
-87.883333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
31
7
55-079-0068
31
7
55-079-0068
31
11.9
55-079-0056
31
4.5
55-079-0010
100
screened; 50km; daily observation percent >=75
4,870
PORT WASHINGTON
US
43.383333
-87.866667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
31
32.2
55-079-0068
31
32.2
55-079-0068
0
null
null
31
13.6
55-089-0009
75
screened; 50km; daily observation percent >=75
4,880
SHEBOYGAN
US
43.75
-87.7
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
0
null
null
0
null
null
0
null
null
31
9.3
55-117-0006
25
screened; 50km; daily observation percent >=75
4,890
MANITOWOC
US
44.1
-87.65
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
0
null
null
0
null
null
0
null
null
31
5.1
55-071-0007
25
screened; 50km; daily observation percent >=75
4,380
PORT HOPE
US
43.95
-82.7
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
0
null
null
0
null
null
0
null
null
31
13.4
26-063-0007
25
screened; 50km; daily observation percent >=75
4,400
BAY CITY
US
43.6
-83.866667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
0
null
null
0
null
null
0
null
null
30
40.9
26-157-9991
24.2
screened; 50km; daily observation percent >=75
3,700
SARNIA
CA
42.983333
-82.416667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,710
POINT EDWARD
CA
43
-82.416667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,730
GODERICH
CA
43.75
-81.733333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,750
PORT ELGIN
CA
44.433333
-81.4
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,760
SOUTHAMPTON
CA
44.5
-81.383333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,770
TOBERMORY
CA
45.266667
-81.666667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,790
LIONS HEAD
CA
44.983333
-81.25
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,810
WIARTON
CA
44.75
-81.133333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,860
OWEN SOUND
CA
44.583333
-80.933333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,880
MEAFORD
CA
44.616667
-80.6
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,890
THORNBURY
CA
44.566667
-80.45
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,900
COLLINGWOOD
CA
44.5
-80.233333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,930
PENETANGUISHENE
CA
44.766667
-79.933333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,940
MIDLAND
CA
44.75
-79.916667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,950
TIFFIN
CA
44.75
-79.85
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,960
PORT MCNICOLL
CA
44.75
-79.8
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,970
VICTORIA HARBOUR
CA
44.75
-79.816667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
3,980
WAUBAUSHENE
CA
44.766667
-79.716667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
4,000
PORT SEVERN
CA
44.8
-79.716667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
4,020
DEPOT HARBOUR
CA
45.316667
-80.1
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
4,030
PARRY SOUND
CA
45.333333
-80.033333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
4,050
BYNG INLET
CA
45.766667
-80.566667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
4,060
KEY HARBOUR
CA
45.883333
-80.75
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
4,080
KILLARNEY
CA
45.966667
-81.516667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
11,905
MAMONAL
CO
10.316667
-75.516667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
13,040
IMBITUBA
BR
-28.233333
-48.666667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
12,935
GUAIBA ISLAND TERMINAL
BR
-23.016667
-44.033333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
12,900
DTSE / GEGUA OIL TERMINAL
BR
-22.816667
-43.15
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
12,950
GEBIG
BR
-23.05
-44.216667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
60,810
DE KASTRI
RU
51.466667
140.783333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
60,820
NIKOLAYEVSK NA AMUR
RU
53.133333
140.733333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
60,860
OKHA
RU
53.55
143
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
60,880
PORONAYSK
RU
49.216667
143.133333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
60,920
KORSAKOV
RU
46.616667
142.766667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
60,930
NEVELSK
RU
46.666667
141.866667
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
60,940
KHOLMSK
RU
47.05
142.05
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
60,980
UGLEGORSK
RU
49.083333
142.033333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
60,990
LESOGORSK
RU
49.45
142.133333
31
31
31
31
31
0
100
five-gas orbit footprint days, unvalidated
null
null
null
null
null
null
null
null
null
null
null
null
null
not screened outside US
End of preview. Expand in Data Studio

Marshmellow

Port activity, atmospheric observations, and reproducible graph inputs.

This public research collection contains the retained data used in a port-environment feasibility study, including the Los Angeles / Long Beach demo. Release 2026-10-28 contains 235 data and metadata files, 447.9 MB (447861818 bytes), plus documentation and checksums. It is a collection of real samples and derived tables, not a complete mission archive or an emissions-attribution benchmark.

Use the configuration selector above to explore port completeness, daily or monthly gases, hourly AIS/NO₂, monitor locations, and the three satellite channels. All splits are called sample; these are convenient table views, not train/test partitions.

What is available

Source Retained coverage Contents and role
NOAA MarineCadastre AIS 15 July 2024 UTC, one national U.S. day Original 309 MB GeoParquet; 9,842,280 reports in the retained file. Derived routes cover 20 earlier port windows and the combined LA/LB demo.
EPA AirData 2024 daily gas files and hourly NO₂; 2024/2025 annual summary snapshots Original national ZIPs. Includes NO₂, SO₂, CO, O₃, NO/NOx/NOy, VOC and hazardous-air-pollutant groups. Station availability varies.
NASA TEMPO Small numeric exports for 1 January 2024, and LA/LB 15 July 2024 at 20:18:25 UTC NO₂ tropospheric column, HCHO column and total O₃; retained V03 subsets and service metadata.
Carbon Mapper / ASU airborne data Selected harbour observations, including 21 June 2023 at 18:02:43 UTC Quantitative methane-enhancement GeoTIFF plus small candidate assets and detection catalogues. Noncommercial terms apply.
Copernicus Sentinel-5P July 2024 catalogue queries Footprints/times for availability screening. No Sentinel-5P concentration granules are included.
NOAA GOES-16 1 January 2024, one paired scan near 19:11 UTC Aerosol optical depth and cloud-mask NetCDF samples. These are not gas concentrations.
NGA World Port Index 2019 snapshot, 3,630 entries Port locations from a public ArcGIS mirror; includes non-cargo ports and terminals.
Natural Earth; USDA/USGS Retained reference geometry and LA/LB imagery Background context. Imagery acquisition dates are unverified; service refresh dates are not observation dates.
Hong Kong open-data pilot 1 January 2024 Small archived air-quality and vessel-arrival samples, separate from the U.S. demo.

Start small

Download only the derived LA/LB tables first:

hf download Celsia/Marshmellow --repo-type dataset \
  --include "outputs/la-lb-demo-2026-10-26/*.csv" \
  --local-dir ./Marshmellow

Or load one table:

from datasets import load_dataset
hourly = load_dataset("Celsia/Marshmellow", "la_lb_hourly_ais_no2", split="sample")

The full release is still under 0.5 GB:

hf download Celsia/Marshmellow --repo-type dataset --local-dir ./Marshmellow
cd Marshmellow
shasum -a 256 -c checksums.sha256

Pin a Hub commit with --revision <commit> for reproducible downloads. Review per-source terms before reuse.

Layout and provenance

  • data/<source>/: retained source archives, rasters, geography and supporting metadata.
  • outputs/: derived CSV tables, route arrays and analysis descriptions used by the graphs.
  • configs/port-complexes.json: the LA/LB and NY/NJ grouping definitions.
  • MANIFEST.json: each payload file's size, SHA-256, origin category and any metadata sanitization.
  • checksums.sha256: checksums for all released files except the checksum list itself.
  • DATA_DICTIONARY.md: units, field meanings and limitations.
  • SOURCES.md and LICENSE: attribution and source-specific conditions.

Measurement ZIPs, GeoParquet, GeoTIFFs, NetCDFs, geometry and analysis arrays retain their original bytes. Temporary signed download parameters were removed from the two Carbon Mapper catalogue exports and their receipts; a local path field was removed from the Natural Earth receipt. These public metadata copies are explicitly marked metadata_sanitized. The original local files were not edited. Original source receipts refer to original hashes; the release manifest is authoritative for the sanitized copies.

Private attachments, account information, local delivery records and private processing code are excluded. Provider manuals are linked rather than copied. Earlier multi-port outputs are retained for reproducibility; only the demo's complex configuration merges LA/LB and NY/NJ, so do not sum overlapping historical port windows.

Interpretation boundaries

Different measurement supports. Surface monitor values are ambient concentrations; TEMPO values are atmospheric columns; the high-resolution methane image is column enhancement above background in ppm·m. They cannot be ranked as “the three most concentrated gases” by their raw numbers.

Resolution. The RGB overview uses native 0.02° TEMPO cells, approximately 1.85 × 2.22 km here. A smooth-looking display cannot supply missing detail. The separate 3.5 m methane raster was measured by the airborne Global Airborne Observatory, not a satellite. No matched three-gas plume at that fine resolution has been established.

Time and attribution. The 2023 plume is not matched to the 2024 AIS day. Its provider sector is other; this collection does not identify a vessel, terminal or operator as its source. Same-day AIS and satellite scan-start matching does not establish per-pixel simultaneity or causality.

Quality and completeness. TEMPO exports lack retained pixel-level QA flags; negative/missing values remain available, and display masking is not retrieval validation. Satellite catalogue overlap is potential coverage, not a valid-pixel score. Ground monitoring outside the U.S. subset is not assessed by the EPA score. Nearby ports can share the same monitor.

Correlation. The hourly demo has only 24 paired hours. Its cargo/tanker-count versus NO₂ Spearman coefficient is about −0.265 and is descriptive. Annual gas correlations do not control meteorology; NOx also overlaps chemically with NO and NO₂.

Credit and permitted use

This is an independent research compilation, not an official product or endorsement by the source agencies. Cite Celsia, Marshmellow, release 2026-10-28, the exact Hugging Face revision, and the relevant original providers listed in SOURCES.md.

Source: Carbon Mapper. Carbon Mapper data and derivatives remain subject to its noncommercial, attribution and redistribution conditions. The other sources retain their own terms; the collection is deliberately not assigned a blanket open-source licence. See LICENSE.

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