IMGインターフェログラムデータの位相補正手法と位相誤差の反転解析結果への影響について Phase Correction Procedure for the IMG Interferogram Data and Effects of the Phase Crrection Error on the Retrieval Results
A phase correction procedure for the IMG interferogram data have been developed. The first step of the procedure is to set the Zero Path Difference (ZDP) sift values of the interferograms for the atmosphere (dX<SUB>a</SUB>), blackbody (dX<SUB>h</SUB>), and the deep space (dX<SUB>c</SUB>) to that stored in the IMG Level 0 data. The second step is to find the dX<SUB>a</SUB> for which anomaly of the phases of the difference vector between the atmosphere and the deep space is minimum. The third step is to find the dX<SUB>h</SUB> for which the phases estimated for the original radiations from the atmosphere and black body are equal to each other. The final step is to shift dX<SUB>a</SUB>, dX<SUB>h</SUB>, and dX<SUB>c</SUB> by the samestep so as that the final phase interested becomes flat.<BR>Also studied were phase error effects on the calibrated spectrum and retrieved vertical profiles of atmospheric parameters such as temperature. The results show that the magnitude of the spectral error caused by the phase error depends on the incident radiation intensity at each wavelength, and that degree and the vertical region where the retrieved results are affected by the spectral change can be estimated from the weighting function analysis.
- 日本リモートセンシング学会誌 = Journal of the Remote Sensing Society of Japan
日本リモートセンシング学会誌 = Journal of the Remote Sensing Society of Japan 17(5), 506-513, 1997-12-25
The Remote Sensing Society of Japan