N: 90 S: -90 E: 180 W: -180
Description
The SeaWiFS instrument was launched by Orbital Sciences Corporation on the OrbView-2 (a.k.a. SeaStar) satellite in August 1997, and collected data from September 1997 until the end of mission in December 2010. SeaWiFS had 8 spectral bands from 412 to 865 nm. It collected global data at 4 km resolution, and local data (limited onboard storage and direct broadcast) at 1 km. The mission and sensor were optimized for ocean color measurements, with a local noon (descending) equator crossing time orbit, fore-and-aft tilt capability, full dynamic range, and low polarization sensitivity.
Product Summary
Citation
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ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)
PROCESSING HISTORY
DATA CITATION GUIDELINES
Variables
The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.
For questions on a specific variable, please use the Earthdata Forum.
| Name Sort descending | Description | Units | Data Type | Fill Value | Valid Range | Scale Factor |
|---|---|---|---|---|---|---|
| att_ang | Computed yaw, roll, pitch | N/A | float32 | N/A | -180 to 180 | N/A |
| cal_offs | Calibration system offsets | N/A | float32 | N/A | N/A | N/A |
| clat | Scan center-pixel latitude | N/A | float32 | N/A | -90 to 90 | N/A |
| clon | Scan center-pixel longitude | N/A | float32 | N/A | -180 to 180 | N/A |
| counts | Digital counts of calibration knees | N/A | float32 | N/A | 0 to 1023 | N/A |
| csol_z | Scan center-pixel solar zenith angle | N/A | float32 | N/A | 0 to 180 | N/A |
| dark_rest | Dark-restore pixel | N/A | int16 | N/A | N/A | N/A |
| elat | Scan end-pixel latitude | N/A | float32 | N/A | -90 to 90 | N/A |
| elon | Scan end-pixel longitude | N/A | float32 | N/A | -180 to 180 | N/A |
| eng_qual | Engineering data-out-of-range flags | N/A | uint8 | N/A | N/A | N/A |
| gain | Band gain settings | N/A | int16 | N/A | 0 to 3 | N/A |
| inst_ana | Instrument analog telemetry | N/A | float32 | N/A | N/A | N/A |
| inst_dis | Instrument discrete telemetry | N/A | uint8 | N/A | N/A | N/A |
| inst_tlm | SeaWiFS instrument telemetry | N/A | int16 | N/A | N/A | N/A |
| l1a_data | Level-1A data | N/A | int16 | N/A | 0 to 1023 | N/A |
| l_vert | Local vertical vector in ECEF frame | N/A | float32 | N/A | -1 to 1 | N/A |
| mirror | Mirror-side correction factors | N/A | float32 | N/A | N/A | N/A |
| nflag | Navigation flags | N/A | int32 | N/A | N/A | N/A |
| orb_vec | Orbit position vector at scan line time | kilometers | float32 | N/A | -7200 to 7200 | N/A |
| rads | Radiances of calibration knees | N/A | float32 | N/A | N/A | N/A |
| scan_ell | Scan-track ellipse coefficients | N/A | float32 | N/A | N/A | N/A |
| scan_temp | Detector temperature counts | N/A | int16 | N/A | 0 to 255 | N/A |
| scan_time | Scan-line time, milliseconds of day | milliseconds | int32 | N/A | 0 to 86399999 | N/A |
| sc_ana | Spacecraft analog telemetry | N/A | float32 | N/A | N/A | N/A |
| sc_dis | Spacecraft discrete telemetry | N/A | uint8 | N/A | N/A | N/A |
| sc_id | Spacecraft ID | N/A | int16 | N/A | N/A | N/A |
| sc_soh | Spacecraft state-of-health data | N/A | uint8 | N/A | N/A | N/A |
| sc_ttag | Spacecraft time tag | N/A | int16 | N/A | N/A | N/A |
| sen_mat | ECEF-to-sensor-frame matrix | N/A | float32 | N/A | -1 to 1 | N/A |
| side | Mirror side for scan line | N/A | int16 | N/A | 0 to 1 | N/A |
| slat | Scan start-pixel latitude | N/A | float32 | N/A | -90 to 90 | N/A |
| slon | Scan start-pixel longitude | N/A | float32 | N/A | -180 to 180 | N/A |
| start_syn | Start-synch pixel | N/A | int16 | N/A | N/A | N/A |
| stop_syn | Stop-synch pixel | N/A | int16 | N/A | N/A | N/A |
| sun_ref | Reference Sun vector in ECEF frame | N/A | float32 | N/A | -1 to 1 | N/A |
| s_flags | Scan-line quality flags | N/A | uint8 | N/A | N/A | N/A |
| s_satp | Number of saturated pixels per band | N/A | int16 | N/A | N/A | N/A |
| s_zerop | Number of zero pixels per band | N/A | int16 | N/A | N/A | N/A |
| tdi | Band time-delay and integration settings | N/A | int16 | N/A | 0 to 255 | N/A |
| tilt | Tilt angle for scan line | N/A | float32 | N/A | -20.10000038147 to 20.10000038147 | N/A |
| tilt_flags | Tilt indicators | N/A | int16 | N/A | -1 to 3 | N/A |
| tilt_lats | Latitudes of tilt-range scan line end points | N/A | float32 | N/A | -90 to 90 | N/A |
| tilt_lons | Longitudes of tilt-range scan line end points | N/A | float32 | N/A | -180 to 180 | N/A |
| tilt_ranges | Scan-line number ranges of scene tilt states | N/A | int16 | N/A | N/A | N/A |
| time | time | seconds since 1970-1-1 | float64 | N/A | N/A | N/A |
| t_const | Time-dependent correction constant terms | N/A | float64 | N/A | N/A | N/A |
| t_linear | Time-dependent correction linear coefficients | N/A | float64 | N/A | N/A | N/A |
| t_quadratic | Time-dependent correction quadratic coefficients | N/A | float64 | N/A | N/A | N/A |