Yuichi Sarusawa
Because degradation can occur on the sensor carried on the earth observation satellite, it should be monitored. Cross calibration is developed for monitoring. Cross calibration between sensors carried on the earth observation satellite is implemented and its result is reported. In prior research of cross calibration, characteristic of spectral responsibility of sensor is not considered. For implementing cross calibration accurately, it should be considered. For consideration of spectral responsibility on cross calibration, we proposed the method that it estimates and reduce the biases existed on between sensors due to differenced of spectral response function of sensor. We applied the method to cross calibration between ASTER and other sensors (MISR, MODIS, ETM+) with error analysis. As a result, we got several result: the biases in green and red band are less than 3.00 (W/m^2/sr/um) except for MISR; the biases in NIR band are bigger than other bands (> 6.00 (W/m^2/sr/um). Therefore, as a result in consideration of spectral responsibility of sensor, the biases in NIR can affect cross calibration by increasing degradation coefficient. Proposed method was shown that the method is valid to implement cross calibration for consideration of spectral responsibility of sensor.