ALOS Data Users Handbook
ALOS Data Users Handbook
ALOS Data Users Handbook
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<strong>ALOS</strong> <strong>Data</strong> <strong>Users</strong> <strong>Handbook</strong>The data are attached to each data band as an Application <strong>Data</strong> Segment at the MDHS system (IDCP). Thereforethe auxiliary data for each band have identical values.Time <strong>Data</strong>: 5 bytesb39-b24GPS Weekb23-b0GPS Second(a) Time dataLine Counter: 2 bytesb15-b0Line Counter(b) Line counterQuick Look <strong>Data</strong>: 5 bytesb39-b38 b37-b36 b35-b34Band 1GainBand 2GainBand 3Gainb33-b32Band 4Gainb31-b24Band 1 Exposure Coefficientb23-b16Band 2 Exposure Coefficient(c) Quick look datab15-b8Band 3 Exposure Coefficientb7-b0Band 4 Exposure CoefficientFigure 3.4-17 Auxiliary <strong>Data</strong> Format of AVNIR-2(1) Time <strong>Data</strong>GPS time distributed from DMS (GPS Week: 16 bits, GPS Second: 24 bits)(2) Line CounterValue of a 12-bit counter counts up each line. It is reset synchronously to the 1PPS reference signal once persecond. Imaging time is calculated from the line counter as follows:3-43
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