Thermogeologic mapping of the Moon from lunar orbit

Details Thermogeologic mapping of the Moon from lunar orbit Thermogeologic mapping of the Moon from lunar orbit

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24..977m&link_type=abstract

In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 2: G-M p 977-978 (SEE N94-16173 03-91)

Physics

1

Infrared Imagery, Lunar Craters, Lunar Maps, Lunar Maria, Lunar Surface, Lunar Temperature, Thermal Mapping, Apollo 17 Flight, Diurnal Variations, Ejecta, Ground Tracks, Highlands, Lunar Far Side, Lunar Photography, Regolith, Spatial Resolution, Temperature Distribution

Scientific paper

The Infrared Scanning Radiometer (ISR) onboard the Apollo 17 Command-Service Module (CSM) mapped thermal emission of the lunar surface from orbit. Measured temperature values span the diurnal range of lunar temperatures (85 K to 400 K) and have an accuracy of approximately plus or minus 2 K. Surface spatial resolution at nadir is 2.2 km. This Apollo data is being revisited using data presentation software for the Macintosh computer, which was not available 20 years ago, even on mainframes. The new thermal images exhibit subtleties in the delineation of geophysical surface units that were unappreciated in the original survey of the data. Looking first at nighttime thermal emission from the ground tracks over Oceanus Procellarum to Mare Orientale, we have confirmed and expanded on earlier observations of regolith differences between mare and highlands and of a scheme for relative age-dating of larger impact craters of the Copernican age. We see an impact crater near Lenz, just north of Orientale, which exhibits an extraordinarily fresh ejecta blanket. Photography of this area is extremely poor, but we can see the feature in the Galileo data. We plan to derive geophysical surface properties of the overflown region using thermal models of regolith structures.

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