Satellite extract files contain a extract (by default 25 x 25 pixels) of satellite data centered in the in situ location.
These files are generated using the SAT_extract module (section 3). Dimensions, variables and global attributes are summarized in Tables 1-3.
Table 1: Dimensions of satellite extract files
| Dimension | Description | Length |
|---|---|---|
| satellite_id | Satellite measurement | Unlimited (1 for each satellite extract file) |
| satellite_bands | Satellite bands | Depends on sensor/processor |
| rows | y spatial coordinate | Default: 25 |
| columns | x spatial coordinate | Default: 25 |
Table 2: Variables included in the satellite extract files.
| Variable | Description | Dimensions |
|---|---|---|
| satellite_bands | Band wavelengths (nm) | satellite_bands |
| satellite_time | Overpass time | satellite_id |
| satellite_Rrs | Satellite-derived Rrs | satellite_id, satellite_bands, rows, columns |
| satellite_latitude | Latitude | satellite_id, rows, columns |
| satellite_longitude | Longitude | satellite_id, rows, columns |
| satellite_AOT_0865p50 | Aerosol Optical Thickness | satellite_id, rows, columns |
| satellite_flag | Flags Data Set | satellite_id, rows, columns |
| satellite_OAA | Observation Azimuth Angle | satellite_id, rows, columns |
| satellite_OZA | Observation Zenith Angle | satellite_id, rows, columns |
| satellite_SAA | Sun Azimuth Angle | satellite_id, rows, columns |
| satellite_SZA | Sun Zenith Angle | satellite_id, rows, columns |
Table 3: Global attributes included in the satellite extract files.
| Attribute | Description |
|---|---|
| creation_time | Creation time (YYYY-mm-ddTHH:MM:SSZ) |
| satellite | Satellite identifier (e.g. S3, S2) |
| platform | Satellite platform (e.g. A or B for S3 or S2) |
| sensor | Satellite sensor (e.g. OLCI, MSI) |
| description | Extract description |
| resolution | Data resolution (e.g. WFR, 20M) |
| satellite_aco_processor | Atmospheric correction processor (e.g. STANDARD, C2RCC |
| satellite_proc_version | Atmospheric correction version |
| insitu_site_name | In situ site name (e.g. VEIT, BEFR) |
| insitu_lat | In situ latitude |
| insitu_lon | In situ longitude |
| < 2. MDB File Structure | Table of contents | 2.2 MDB files > |
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