Abstract
Microvibrations onboard greenhouse gases observing satellite (GOSAT) cause scan speed variations in the TANSO Fourier transform spectrometer. The associated periodic sampling errors generate ghost features in A-band spectra, where surface pressure and aerosol properties are retrieved to determine the optical path through the atmosphere. A correction algorithm has been developed to re-compute the interferograms at equally spaced sampling intervals. The key is to determine iteratively the amplitude and phase of sinusoidal perturbations with predetermined frequencies to minimize the magnitude of the out-of-band ghosts artifacts after correction of the sampling grid. This correction algorithm drastically reduces errors in retrieved surface pressure and improves agreement with ground-based observations.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Akihiko Kuze, Hiroshi Suto, Masakatsu Nakajima, and Takashi Hamazaki
Appl. Opt. 48(35) 6716-6733 (2009)
Yukio Yoshida, Hiroyuki Oguma, Isamu Morino, Hiroshi Suto, Akihiko Kuze, and Tatsuya Yokota
Appl. Opt. 49(1) 71-79 (2010)
Sergey Oshchepkov, Andrey Bril, Tatsuya Yokota, Yukio Yoshida, Thomas Blumenstock, Nicholas M. Deutscher, Susanne Dohe, Ronald Macatangay, Isamu Morino, Justus Notholt, Markus Rettinger, Christof Petri, Matthias Schneider, Ralf Sussman, Osamu Uchino, Voltaire Velazco, Debra Wunch, and Dmitry Belikov
Appl. Opt. 52(6) 1339-1350 (2013)