Mathematics – Logic
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufm.p22a0402s&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #P22A-0402
Mathematics
Logic
0305 Aerosols And Particles (0345, 4801), 0343 Planetary Atmospheres (5405, 5407, 5409, 5704, 5705, 5707), 5707 Atmospheres: Structure And Dynamics, 5709 Composition, 5794 Instruments And Techniques
Scientific paper
Atmospheric studies were attempted for the first time during the FIDO field test August 10-24, 2002. Tools and instruments designed for geologic studies were modified during the test to allow the Atmospheric Sciences Group to retrieve data relevant to studies of the Earth's atmospheric properties. Naturally, the goals of the test were not to improve our knowledge of the Earth's atmosphere, but to test operational concepts pertinent to the MER mission to two locations on Mars. MER will be operational during the period from January 2004 to mid-summer 2004. Several types of instrumental observations were attempted. PANCAM images of the sky were analyzed to provide information about the scattering properties of aerosols and gases. Halos were observed at 22 and 46 degrees around the Sun, a sure sign of high altitude ice crystals. Two different cloud types were observed using the NAVCAM, cirrus and cumulous. The angular velocity and direction of the cloud motions was calculated. Spectra of the sky were retrieved from a near IR spectrometer which showed the presence of water ice on the day that haloes were observed. The experiences gained from the FIDO field test are being translated into operational sequences and tools for the MER mission. Examples of observations that will be performed by MER are: HAZCAM and NAZCAM movies during mid-day to search the horizon for dust devils, PANCAM images of the sky brightness, cloud motion movies, images of the solar disk by PANCAM throughout the day to monitor opacity, and images of the radiometric target to estimate dustfall during the mission. These and other observations will characterize the atmospheric properties at the two landing sites.
Lemmon Mark Thomas
Smith Paul H.
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