Interpretation of angular dependence of backscattering from the Moon and Venus

作者：Petr Beckmann, W.K. Klempere · 发表于：Journal of Research of the National Bureau of Standards Section D Radio Science · 年份：1965 · DOI：10.6028/jres.069d.198 · 被引用次数：18 · 研究领域：Planetary Science and Exploration、Calibration and Measurement Techniques、Optical Polarization and Ellipsometry

The small crater Heinsius A which exhibited th e radar e nhancem e nt is th e bri ght s pot indi cated by the arrow.Also, it is known that durin g a lun a r eclip se th e rayed crater s ex hibit a differen t coo lin g rat e than th e rest of th e lunar s urface.Th e mos t re ce nt measure• ments of a lunar eclipse in Dece mb er 1964, show that many other craters also s ho w thi s a nam olou s coo lin g behavior.On e of th e ne wly di scove red " th ermalanamolou s" cra ters ha s bee n te nt atively identified as He in siu s A, the c ra te r whi c h was bright under full moon and s howe d a radar e nhan ce me nt.The optical, thermal, and radar res ults can be explained by localized areas of bare, ex posed , and com pact roc k.In conclus ion , lunar radar ec hoes were examined in delay and frequ e ncy in a mann e r such that ret urns were reflected from localized areas on th e lunar surface.Th e ma ppin g of th ese re turn s s howe d that young and r aye d cra ters have e nh a nced radar sca tte rin g.Th e c raters which s how th ese rad a r e nh a nceme nts a lw ays a pp ear bri ght on th e full moon a nd from th e latest infrared res ult s, appear to be a namo lous in that regim e also.The resu lt s a t all wav ele ngth s ca n be exp lain ed if th ese are loca li zed a reas of bare, exposed, and co mpacted roc ks.Although this pape r concerned the radar behavior of young a nd rayed craters it should be noted that th e mountainou s regions we re s hown to re fle ct more power ...