Mean Earth's equipotential surface from TOPEX/POSEIDON altimetry

被引：27
|
作者：
Bursa, M
Kouba, J
Radej, K
True, SA
Vatrt, V
Vojtísková, M
机构：
[1] Acad Sci Czech Republ, Inst Astron, Prague 14131 4, Czech Republic
[2] Nat Resources Canada, Geodet Survey Div, Ottawa, ON K1A 0E9, Canada
[3] Army Czech Republ, Topog Serv, Topog Inst, VTOPU, Dobruska 51801, Czech Republic
[4] Natl Image & Mapping Agcy, St Louis, MO 63118 USA
来源：
STUDIA GEOPHYSICA ET GEODAETICA | 1998年 / 42卷 / 04期
关键词：
geopotential; mean surface; satellite altimetry;
D O I：
10.1023/A:1023356803773
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The geopotential value of W-0 = (62 636 855.611 +/- 0.008) m(2)s(-2) which specifies the equipotential surface fitting the mean ocean surface best, was obtained from four years (1993 - 1996) of TOPEX/POSEIDON altimeter data (AVISO, 1995). The altimeter calibration error limits the actual accuracy of W-0 to about (0.2 - 0.5) m(2)s(-2) (2 - 5) cm. The same accuracy limits also apply to the corresponding semimajor axis of the mean Earth's level ellipsoid a = 6 378 136.72 In (mean tide system), a = 6 378 136.62 m (zero tide system), a = 6 378 136.59 m (tide-free). The variations irt the yearly mean values of the geopotential did not exceed +/- 0.025 m(2)s(-2) (+/-2.5 mm).
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页码：459 / 466
页数：8
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