伽利略对木星深层纬向风的多普勒测量

Galileo Doppler Measurements of the Deep Zonal Winds at Jupiter.

作者信息

Atkinson DH, Pollack JB, Seiff A

机构信息

D. H. Atkinson, University of Idaho, Moscow, ID 83844, USA. J. B. Pollack, NASA Ames Research Center, Moffett Field, CA 94035, USA. A. Seiff, San Jose State University Foundation, NASA Ames Research Center, Moffett Field, CA 94035, USA.

出版信息

Science. 1996 May 10;272(5263):842-3. doi: 10.1126/science.272.5263.842.

DOI:10.1126/science.272.5263.842

PMID:8662573

Abstract

Changes in the speed of the Galileo probe caused by zonal winds created a small but measurable Doppler effect in the probe relay carrier frequency. Analysis of the probe relay link frequency allows direct measurements of the speed of Jupiter's zonal winds beneath the cloud tops. The deep winds were prograde and strong, reaching a sustained 190 to 200 meters per second at an altitude marked by a pressure of 24 bars. The depth and strength of the zonal winds severely constrain dynamic modeling of the deeper layers and begin to rule out many shallow weather theories.

摘要

由纬向风引起的伽利略探测器速度变化在探测器中继载波频率中产生了一个小但可测量的多普勒效应。对探测器中继链路频率的分析允许直接测量云顶以下木星纬向风的速度。深层风是顺行且强劲的，在压力为24巴的高度处达到持续每秒190至200米。纬向风的深度和强度严重限制了深层的动力学建模，并开始排除许多浅层天气理论。