| log_id,timestamp,sensor_location,temperature_c,salinity_ppt,ph_level,event_code,event_description,visual_observation,equipment_status,data_quality_flag | |
| ENV_0001,2025-01-10 08:00:00,Atlantic-N40W50,14.5,35.2,8.1,P_OK,Normal Operation,Surface appears calm, no visual anomalies.,Battery 95%,Green | |
| ENV_0002,2025-01-10 08:30:00,Atlantic-N40W50,14.4,35.2,8.1,D_HIGH,High dissolved oxygen saturation,Consistent phytoplankton bloom visible in water column.,Battery 94%,Yellow | |
| ENV_0003,2025-01-10 09:00:00,Atlantic-N40W50,14.3,35.3,8.0,M_CAL,Standard Maintenance Call,Routine data transmission successful. No user action required.,Battery 93%,Green | |
| ENV_0004,2025-01-10 09:30:00,Atlantic-N40W50,14.2,35.3,7.9,P_WARN,Minor pressure sensor drift detected,Noticeable increase in wave height (est. 1.5m), moderate swell.,Battery 93%,Yellow | |
| ENV_0005,2025-01-10 10:00:00,Atlantic-N40W50,14.1,35.4,7.9,W_MOV,Change in current velocity,Strong current pulling anchor line taut. Water visibility low.,Battery 92%,Green | |
| ENV_0006,2025-01-10 10:30:00,Atlantic-N40W50,14.1,35.4,7.8,P_OK,Normal Operation,Small debris field passing the buoy. Primarily plastic bottles.,Battery 91%,Green | |
| ENV_0007,2025-01-10 11:00:00,Atlantic-N40W50,14.0,35.5,7.7,A_LOW,Low pH reading,Water color is slightly turbid, suggesting sediment runoff or upwelling.,Battery 90%,Red | |
| ENV_0008,2025-01-10 11:30:00,Atlantic-N40W50,13.9,35.5,7.7,E_ERR,Failed calibration sequence,Error in internal clock synchronization. Recalibrating.,Battery 89%,Red | |
| ENV_0009,2025-01-10 12:00:00,Atlantic-N40W50,13.8,35.6,7.7,P_OK,Normal Operation,Surface completely overcast, no direct sunlight, heavy cloud cover.,Battery 89%,Green | |
| ENV_0010,2025-01-10 12:30:00,Atlantic-N40W50,13.8,35.6,7.8,W_STORM,Sudden weather front change,Heavy rainfall started suddenly. Wind speed estimated at 30 knots.,Battery 88%,Yellow | |
| ENV_0011,2025-01-10 13:00:00,Atlantic-N40W50,13.7,35.7,7.8,S_DRIFT,Salinity reading drift,Minor interference on conductivity sensor. Likely biofouling beginning.,Battery 87%,Yellow | |
| ENV_0012,2025-01-10 13:30:00,Atlantic-N40W50,13.7,35.7,7.9,P_OK,Normal Operation,Visibility severely reduced by rain and wave spray.,Battery 86%,Green | |
| ENV_0013,2025-01-10 14:00:00,Atlantic-N40W50,13.6,35.8,7.9,M_CAL,Standard Maintenance Call,Data integrity checks passed. All sensors responding, despite weather.,Battery 85%,Green | |
| ENV_0014,2025-01-10 14:30:00,Pacific-S15E170,22.1,33.5,8.2,P_OK,Normal Operation,Tropical clear sky conditions. Gentle breeze.,Battery 98%,Green | |
| ENV_0015,2025-01-10 15:00:00,Pacific-S15E170,22.2,33.4,8.2,S_WARN,Salinity variance detected,Sensor appears to be partially exposed to air during high swell cycles.,Battery 97%,Yellow | |
| ENV_0016,2025-01-10 15:30:00,Pacific-S15E170,22.3,33.4,8.3,D_LOW,Low dissolved oxygen saturation,Few fish visible near the surface. Very clear water.,Battery 96%,Green | |
| ENV_0017,2025-01-10 16:00:00,Pacific-S15E170,22.4,33.3,8.3,A_HIGH,High pH reading,Strong sunlight intensity is noted, likely photosynthetic activity is high.,Battery 95%,Yellow | |
| ENV_0018,2025-01-10 16:30:00,Pacific-S15E170,22.4,33.3,8.4,P_OK,Normal Operation,Buoy is drifting slightly north-west from expected position.,Battery 95%,Green | |
| ENV_0019,2025-01-10 17:00:00,Pacific-S15E170,22.5,33.2,8.4,E_ERR,Internal memory error,Failed to write log file to permanent storage. Using buffer.,Battery 94%,Red | |
| ENV_0020,2025-01-10 17:30:00,Pacific-S15E170,22.5,33.2,8.4,P_OK,Normal Operation,Large sea turtle passed close to the sensor array. Visual confirmation.,Battery 93%,Green | |
| ENV_0021,2025-01-10 18:00:00,Pacific-S15E170,22.6,33.1,8.3,W_CALM,Ocean surface is completely calm, minimal wave action, post-sunset.,Battery 92%,Green | |
| ENV_0022,2025-01-10 18:30:00,Pacific-S15E170,22.6,33.1,8.3,M_CAL,Standard Maintenance Call,All scheduled diagnostics initiated and passed. No warnings.,Battery 91%,Green | |
| ENV_0023,2025-01-10 19:00:00,Pacific-S15E170,22.5,33.1,8.2,P_OK,Normal Operation,Night-time observations: bioluminescence is visible in the immediate water surrounding the buoy.,Battery 90%,Green | |
| ENV_0024,2025-01-10 19:30:00,Indian-S20E90,27.9,34.1,7.9,P_OK,Normal Operation,Clear conditions, high heat index. Very high surface temperature reading.,Battery 96%,Green | |
| ENV_0025,2025-01-10 20:00:00,Indian-S20E90,27.8,34.2,7.9,T_HEAT,High temperature reading,Thermistor reading is borderline maximum operating range.,Battery 95%,Yellow | |
| ENV_0026,2025-01-10 20:30:00,Indian-S20E90,27.7,34.2,7.8,A_LOW,Low pH reading,Possible localized hydrothermal vent activity nearby. Further analysis needed.,Battery 94%,Red | |
| ENV_0027,2025-01-10 21:00:00,Indian-S20E90,27.6,34.3,7.8,P_OK,Normal Operation,Small vessel (fishing boat) observed passing approximately 500m away.,Battery 93%,Green | |
| ENV_0028,2025-01-10 21:30:00,Indian-S20E90,27.5,34.3,7.9,W_MOV,Change in current velocity,Current speed increased significantly, indicating a strong offshore flow.,Battery 92%,Yellow | |
| ENV_0029,2025-01-10 22:00:00,Indian-S20E90,27.5,34.4,7.9,M_CAL,Standard Maintenance Call,Antifouling system activated successfully. Logging complete.,Battery 91%,Green | |
| ENV_0030,2025-01-10 22:30:00,Indian-S20E90,27.4,34.4,8.0,P_OK,Normal Operation,No further visual events. Stable midnight readings.,Battery 90%,Green | |
| ENV_0031,2025-01-10 23:00:00,Indian-S20E90,27.4,34.5,8.0,E_RECOV,Error Recovery Complete,Internal memory issue resolved. Buffer flushed and written to permanent storage.,Battery 89%,Green |