An improvement to the volcano-scan algorithm for atmospheric correction of CRISM and OMEGA spectral data

Details An improvement to the volcano-scan algorithm for atmospheric correction of CRISM and OMEGA spectral data An improvement to the volcano-scan algorithm for atmospheric correction of CRISM and OMEGA spectral data

2009-03-21

arxiv.org/abs/0903.3672v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

17 pages, 6 figures, accepted for publication in 'Planetary and Space Science'

Scientific paper

The observations of Mars by the CRISM and OMEGA hyperspectral imaging spectrometers require correction for photometric, atmospheric and thermal effects prior to the interpretation of possible mineralogical features in the spectra. Here, we report on a simple, yet non-trivial, adaptation to the commonly-used volcano-scan correction technique for atmospheric CO_2, which allows for the improved detection of minerals with intrinsic absorption bands at wavelengths between 1.9-2.1 $\mu$m. This volcano-scan technique removes the absorption bands of CO_2 by ensuring that the Lambert albedo is the same at two wavelengths: 1.890 $\mu$m and 2.011 $\mu$m, with the first wavelength outside the CO_2 gas bands and the second wavelength deep inside the CO_2 gas bands. Our adaptation to the volcano-scan technique moves the first wavelength from 1.890 $\mu$m to be instead within the gas bands at 1.980 $\mu$m, and for CRISM data, our adaptation shifts the second wavelength slightly, to 2.007 $\mu$m. We also report on our efforts to account for a slight ~0.001 $\mu$m shift in wavelengths due to thermal effects in the CRISM instrument.

Affiliated with

Also associated with

No associations

Rating

An improvement to the volcano-scan algorithm for atmospheric correction of CRISM and OMEGA spectral data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with An improvement to the volcano-scan algorithm for atmospheric correction of CRISM and OMEGA spectral data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An improvement to the volcano-scan algorithm for atmospheric correction of CRISM and OMEGA spectral data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-636774