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  • altimetry  (1)
  • geopotential - mean surface – satellite altimetry  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Mean Earth'S Equipotential Surface From Topex/Poseidon Altimetry (1998)
    Springer
    Studia geophysica et geodaetica 42 (1998), S. 459-466 
    Details
    ISSN: 1573-1626
    Keywords: geopotential - mean surface – satellite altimetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Abstract 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 m (mean tide system), a = 6 378 136.62 m (zero tide system), a = 6 378 136.59 m (tide-free). The variations in the yearly mean values of the geopotential did not exceed ±0.025 m 2 s −2 (±2.5 mm).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1023356803773
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  • 2
    Electronic Resource
    Electronic Resource
    Topex/Poseidon Altimetry and Dynamics of the Ocean-Atmosphere System (2000)
    Springer
    Studia geophysica et geodaetica 44 (2000), S. 1-12 
    Details
    ISSN: 1573-1626
    Keywords: Sea surface ; altimetry ; variations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Abstract The T/P altimeter data 1993 – 1997 (cycles 11 – 194) has been analyzed with emphases on seasonal variations in sea surface topography (SST). The amplitude of the annual variations amounted to (5.9±0.3) mm when inverted barometer (IB) corrections were applied and (2.0±0.4) mm without any IB corrections. The amplitude of the semi-annual variations in SST was small with IB corrections applied: (0.6±0.3) mm. However, when no IB corrections were applied, it was (1.8±0.4) mm, i.e. the semiannual variations are at the same level as the annual variations with no IB corrections. The phase angle offset of the annual term has shifted by about 180° when IB correction was applied. The dynamics of the ocean-atmosphere system is discussed and it is concluded that it could, at least partly, be responsible for the above observed effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022052022618
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    Paper (German National Licenses)
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