Astron. Astrophys. Suppl. Ser. 134, 187-192
CNR Istituto di Fisica dello Spazio Interplanetario Area di Ricerca di Tor Vergata Via Fosso del Cavaliere, 00133 Rome, Italy
Received December 29, 1997; accepted May 15, 1998
A method to improve the spatial contrast of planetary images acquired by means of push-broom imaging spectrometers is presented. The technique allows to better recognize the boundaries of spatially coherent units with different mineralogic composition. We have analyzed the case of a surface observed by means of an imaging spectrometer from a ground-based telescope. It is assumed that image degradation is mainly due to the atmosphere placed between the surface remotely sensed and the instrumentation. A possible extension to space born imaging spectrometers affected by random errors of the pointing system is also discussed. An example relative to the observation of the Moon is given.
Key words: instrumentation: spectrographs -- techniques: spectroscopic -- planets and satellites: general -- space vehicles -- methods: statistical
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