MAGELLAN - ELECTRICAL AND PHYSICAL-PROPERTIES OF VENUS SURFACE

被引：44

作者：

TYLER, GL

FORD, PG

CAMPBELL, DB

ELACHI, C

PETTENGILL, GH

SIMPSON, RA

机构：

[1] MIT,CAMBRIDGE,MA 02139

[2] CORNELL UNIV,ITHACA,NY 14853

[3] CALTECH,JET PROP LAB,PASADENA,CA 91109

来源：

SCIENCE | 1991年 / 252卷 / 5003期

关键词：

D O I：

10.1126/science.252.5003.265

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：

Magellan probes Venus' surface by 12.6-cm-wavelength vertical and oblique radar scattering and measures microwave thermal emission. Emissivity and root-mean-square slope maps between 330-degrees and 30-degrees-E and 90-degrees-N and 80-degrees-S are dissimilar, although some local features are exceptions. Inferred surface emissivities typically are approximately 0.85, but vary from approximately 0.35 at Maxwell to approximately 0.95 northeast of Gula Mons and other locations. Lowest emissivities appear in topographically high areas; this relation suggests that a phase change or differences in chemical weathering occur at about 6055-kilometer radius. Initial results indicate that there are significant variations in the surface scattering function.

引用

页码：265 / 270

页数：6

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