The Clementine bistatic radar experiment

被引:319
作者
Nozette, S
Lichtenberg, CL
Spudis, P
Bonner, R
Ort, W
Malaret, E
Robinson, M
Shoemaker, EM
机构
[1] USN,RES LAB,WASHINGTON,DC 20375
[2] LUNAR & PLANETARY INST,HOUSTON,TX 77058
[3] PROTASIS INC,ALEXANDRIA,VA 22314
[4] APPL COHERENT TECHNOL,HERNDON,VA 22070
[5] US GEOL SURVEY,FLAGSTAFF,AZ 86001
关键词
D O I
10.1126/science.274.5292.1495
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
During the Clementine 1 mission, a bistatic radar experiment measured the magnitude and polarization of the radar echo versus bistatic angle, beta, for selected lunar areas. Observations of the lunar south pole yield a same-sense polarization enhancement around beta = 0. Analysis shows that the observed enhancement is localized to the permanently shadowed regions of the lunar south pole. Radar observations of periodically solar-illuminated lunar surfaces, including the north pole, yielded no such enhancement. A probable explanation for these differences is the presence of low-loss volume scatterers, such as water ice, in the permanently shadowed region at the south pole.
引用
收藏
页码:1495 / 1498
页数:4
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