Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/CampbelltagR1939tp.ps Дата изменения: Tue May 25 19:57:25 2004 Дата индексирования: Sat Dec 22 23:12:00 2007 Кодировка: Поисковые слова: regolith

Proposal Identification No.: R1939 Date Received: 2004­Feb­04 17:24:21
Technical Page
Proposal Type: Regular
General Category: Planetary Radar
Observation Category: Solar System
Total Time Requested: 16 Hours
Proposal Title: 70­cm Wavelength Bistatic Radar Observations of the Lunar Highlands
ABSTRACT:
Radar signals at 70­cm wavelength can penetrate to depths of 5 m or more in the relatively low­loss, anorthositic
regolith of the lunar highlands. This makes such observations particularly sensitive to modest changes in the
regolith loss tangent and rock population. In contrast, photographic and multispectral data probe only the upper
few microns of the lunar surface, and are strongly modulated by shallow compositional di#erences (such as crater
rays) and maturity (space weathering). We propose here to continue to collect Arecibo GBT bistatic,
high­resolution 70­cm radar images of the lunar southern highlands, and to combine these data with Clementine
infrared and Earth based thermal measurements to better understand the nature of ejecta from the Moon's giant
basins.
Name Institution E­mail Phone Student
Bruce A Campbell Smithsonian Institu­
tion
campbellb@nasm.si.edu 202 633­2472 no
Service Observing Request Remot e Observing Request
X None X No
All of the observing run. Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
430 CH receiver 430 CH radar
Atmospheric Observation Instruments:
Special Equipment or setup: We are submitting this request to the GBT for scheduling of the
bistatic experiment.
RFI Considerations
1

Frequency Ranges Planned
430 MHz
This proposal requires coordination with AFTWF within the band 425­435 MHz.
2