ACCURACIES OF ATMOSPHERIC PROFILES OBTAINED FROM GPS OCCULATIONS

被引：36

作者：

HARDY, KR

HAJJ, GA

KURSINSKI, ER

机构：

[1] Lockheed Missiles and Space Company, Inc., Palo Alto, California, 94304-1191

[2] Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, 91109

来源：

INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS | 1994年 / 12卷 / 05期

关键词：

ATMOSPHERIC SOUNDING; REFRACTIVE-INDEX PROFILES; GLOBAL POSITIONING SYSTEM; OCCULATIONS; IONOSPHERIC EFFECTS;

D O I：

10.1002/sat.4600120508

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Radio occultation studies of the terrestrial atmosphere are possible through the use of signals transmitted by satellites of the Global Positioning System (GPS) and received by one or more other satellites in low earth orbit (LEO). The perturbed phase of the occulted signal gives direct information on the refractivity profile in the region of occultation, from which vertical profiles of density, pressure and temperature can be retrieved. The technique requires the use of the dual GPS frequencies in order to isolate and remove most of the ionospheric effect. Analysis of the effect of the ionosphere and methods of removing it will be presented. For the recovery of atmospheric profiles, two major issues are addressed. The first is how accurately can refractivity be retrieved for a region in which there is a large horizontal refractivity gradient; the second considers the separation of temperature and moisture in the lower troposphere. Based on model simulations, the capability of GPS to provide atmospheric profiles is assessed.

引用

页码：463 / 473

页数：11

共 10 条

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