The ATSR Project
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GBT -Gridded Brightness Temperature
GBT is an ungridded brightness temperature/reflectance product (an extension of the SADIST-1 BT product). The product contains g ridded, calibrated brightness temperatures or reflectance\rquote s from all or some of the ATSR-1/ATSR-2 detectors. The product optionally includes pixel latitude/longitude positions, X/Y offsets (sub-pixel across-track/along-track) co-ordinates.
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.
GBT
| Code | Meaning | ATSR-1 | ATSR-2 |
|---|---|---|---|
| N | Nadir-only records | Optional
(omitted by default) |
Optional
(omitted 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 | Optional
(omitted by default) |
Optional
(omitted by default) |
| X | Pixel X/Y co-ordinates records | Optional
(omitted by default) |
Optional
(omitted by default) |
| C | Cloud-clearing/hand-flagging result records | Optional
(omitted by default) |
Optional
(omitted by default) |
Page last modified : Tuesday, 04-Dec-07