Compositional variability of the Martian surface

Details Compositional variability of the Martian surface Compositional variability of the Martian surface

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept..523a&link_type=abstract

In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 523-524 (SEE N92-10728 01-91)

Physics

Geophysics

Chemical Composition, Image Processing, Mars Photographs, Mars Surface, Spectrum Analysis, Surface Properties, Variability, Basalt, Calibrating, Multispectral Photography, Shales, Spectral Bands, Spectral Reflectance

Scientific paper

Spectral reflectance data from Viking Landers and Orbiters and from telescopic observations were analyzed with the objective of isolating compositional information about the Martian surface and assessing compositional variability. Two approaches were used to calibrate the data to reflectance to permit direct comparisons with laboratory reference spectra of well characterized materials. In Viking Lander multispectral images (six spectral bands) most of the spectral variation is caused by changes in lighting geometry within individual scenes, from scene to scene, and over time. Lighting variations are both wavelength independent and wavelength dependent. By calibrating lander image radiance values to reflectance using spectral mixture analysis, the possible range of compositions was assessed with reference to a collection of laboratory samples, also resampled to the lander spectral bands. All spectra from the lander images studied plot (in six-space) within a planar triangle having at the apexes the respective spectra of tan basaltic palagonite, gray basalt, and shale. Within this plane all lander spectra fit as mixtures of these three endmembers. Reference spectra that plot outside of the triangle are unable to account for the spectral variation observed in the images.

Affiliated with

Also associated with

No associations

Rating

Compositional variability of the Martian surface 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 Compositional variability of the Martian surface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compositional variability of the Martian surface will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1276814