Information Approach to Channel Selection for Stellar Occultation Measurements
In this paper we examine methods for the selection of spectral channels using information theory. These methods take the information content of the measurements as a criterion. The optimal selection of spectral channels becomes especially important with the recent introduction of high spectral resolution satellite instruments for monitoring the atmosphere. The problem of optimal selection of spectral channels cannot be solved exactly, because of the astronomical number of different channel combinations. An effective procedure for searching for the optimal data subset is therefore needed. This paper develops the approach to the channel selection proposed in . We show an application of a sequential selection, a sequential deselecting procedure and a fast algorithm for channels selection to determination of the most informative channels for the COALA instrument.
KeywordsInformation Content High Spectral Resolution Channel Selection Spectral Channel Sequential Selection
Unable to display preview. Download preview PDF.
- Bennet VL, Dudhia A, Rodgers CD (1999) Microwindows selection for MIPAS using information content. ESAMS99, European Symposium on Atmospheric Measurements from Space, vol. WPP-161: pp. 265–270, ESA, NordwijkGoogle Scholar
- Kyrölä E, et aI. (1993) Inverse theory for occultation measurements. 1. Spectral inversion. J Geophys Res Vol. 98 No. D4: 7367–7381Google Scholar
- Lerner J, Weisz E, Kirchengast G (2002) Temperature and humidity retrieval from simulated Infrared Atmospheric Sounding Interferometer (IASI) measurements. J Geophys Res Vol.107 No. D14: DOI 19.1029/2001JD900254Google Scholar
- Rodgers CD (1996) Information content and optimization of high spectral resolution measurements. In: Hays PB, Wang J (eds) Optical Spectroscopic techniques and Instrumentation for Atmospheric and Space Research II. Proc of SPIE, 2830: 136–147Google Scholar
- Shannon CE (1948) A Mathematical Theory of Communication. The Bell System Technical J 27: 379–423 and 623–656Google Scholar