The ATSR Project
|
Average Brightness Temperature
ABT is a spatially-averaged brightness temperature /reflectance product. The produ ct contains spatially-averaged brightness temperature /reflectance from some or all of the ATSR-1/ATSR-2 detectors, categorised by view, channel, surface type and cloud presence.
Ungridded products contain pixels in the ATSR scan geometry. There is a correspondence between the contents of a record and the contents of an ATSR instrument scan.
Gridded products contain 512x512 pixel images. The correspondence between pixel and the ATSR instrument scan from which it came has been lost. Nadir and forward view pixels are collocated, and have been regridded onto a 1km grid.
ABT
| Code | Meaning | ATSR-1 | ATSR-2 |
|---|---|---|---|
| N | Nadir-only records | Optional
(present by default) |
Optional
(present by default) |
| T | Thermal infra-red detector counts (12.0µm, 11.0µm, 3.7µm, 1.6µm) | Optional
(present by default) |
Optional
(present by default) |
| V | Visible/near-infra-red detector records (1.6µm, 0.87µm, 0.65µm, 0.55µm) | Not an option | Optional
(present by default) |
| L | Pixel latitude/longitude records | Not an option | Not an option |
| X | Pixel X/Y co-ordinates records | Not an option | Not an option |
| C | Cloud-clearing/hand-flagging result records | Optional
(omitted by default) |
Optional
(omitted by default) |
