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V005 MODIS/Terra Thermal Anomalies/Fire 5-Min L2 Swath 1km Algorithm QA
The QA information below is excerpted from the MOD14.005 file specification found at ftp://modular.nascom.nasa.gov/pub/LatestFilespecs/collection5/MOD14.fs
MOD14.005 QA Descriptions (32-bit)
| Bit No. | Parameter Name | Bit Comb. | Algorithm_QA |
|---|---|---|---|
| 0-1 | MODLAND QA bits | 00 | Fire/no-fire determined at optimum confidence |
| 01 | Fire/no-fire determined at less than optimum confidence | ||
| 10 | No determination made due to cloud cover | ||
| 11 | No determination made due to other reason(s) | ||
| 2 | 3.9 micron high-gain flag | 0 | band 21 used |
| 1 | band 22 used | ||
| 3 | Atmospheric correction | 0 | Not performed |
| 1 | Performed | ||
| 4 | Day/night algorithm | 0 | Night |
| 1 | Day | ||
| 5 | Potential fire pixel | 0 | No (if no, remaining QA fields except bit 23 are not set) |
| 1 | Yes | ||
| 6 | Spare (set to zero) | 0 | Spare |
| 7-10 | Background window size parameter, R | R = 0 | Unable to characterize background |
| R > 0 | Background characterized with (2R+1) by (2R+1) window | ||
| 11 | 360 K T21 test | 0 | Fail |
| 1 | Pass | ||
| 12 | DT relative test | 0 | Fail |
| 1 | Pass | ||
| 13 | DT absolute test | 0 | Fail |
| 1 | Pass | ||
| 14 | T21 relative test i | 0 | Fail |
| 1 | Pass | ||
| 15 | T31 relative test ii | 0 | Fail |
| 1 | Pass | ||
| 16 | Background fire T21 deviation test | 0 | Fail |
| 1 | Pass | ||
| 17-20 | Spare (set to zero) | 0 | Spare |
| 21 | Adjacent cloud pixel (valid only if fire mask = 7, 8, or 9) | 0 | No |
| 1 | Yes | ||
| 22 | Adjacent water pixel (valid only if fire mask = 7, 8, or 9) | 0 | No |
| 1 | Yes | ||
| 23 | Sun glint level | 0-3 | |
| 24 | Sun glint rejection flag | 0 | False |
| 1 | True | ||
| 25 | Hot surface boundary rejection flag | 0 | False |
| 1 | True | ||
| 26 | Coastal false alarm rejection flag | 0 | False |
| 1 | True | ||
| 27-31 | Spare (set to zero) | 0 | spare |
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