Download Earth Observation with CHAMP: Results from Three Years in by Christoph Reigber, Hermann Lühr, Peter Schwintzer, Jens PDF

By Christoph Reigber, Hermann Lühr, Peter Schwintzer, Jens Wickert

In the summertime of 2000 the German geo-research satellite tv for pc CHAMP was once embarked on orbit. Its leading edge payload association and the low preliminary orbit let CHAMP to concurrently acquire and virtually regularly examine targeted information with regards to gravity and magnetic fields at low altitude. moreover, CHAMP additionally measures the impartial surroundings and ionosphere utilizing GPS thoughts. 3 years after release, greater than two hundred CHAMP investigators and co-investigators from worldwide met on the GeoForschungsZentrum in Potsdam to offer and speak about the implications derived from the  vast facts units of the venture. the most final result of this professional assembly is summarized during this quantity. The publication bargains a entire perception into the current prestige of the exploitation of CHAMP data for Earth approach study and functional purposes in geodesy, geophysics and meteorology.

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For non-tidal 36 Jürgen Neumeyer et al. Fig. 3. Gravity variations for Metsahovi station including Earth tidal STA, SSA and SA. forces induced elastic deformation the load Love numbers must be applied. Figure 3 shows an example of Metsahovi station. For this purpose the SG data have been processed according to the above processing procedure but without reduction of the long-periodic tidal waves STA, SSA and SA (GrV_LP). From this data set monthly averages (mGrV_LP) are calculated. For comparing with CHAMP the mass and deformation potential terms must be considered.

1999]. After these gravity reductions we got the SG gravity variations. For comparing with CHAMP, monthly means of the gravity variations were calculated. - 4 Comparison results The present SG network comprises 20 stations in operation. 207 deg, h=406 m). For the time period from Dec. 2001 to Dec. 2002 the gravity data of these sites were processed according to the above processing procedure. For comparison monthly averages of the gravity variations are used. The assigned CHAMP values are taken from the monthly global gravity field solutions for the coordinates of the selected SG sites.

Amazon area). Key words: gravity field, CHAMP, Superconducting Gravimeter, gravity variation 1 Introduction One objective of the new-generation satellite gravity missions CHAMP and GRACE is the recovery of temporal Earth gravity field variations. For the CHAMP mission the gravity resolution is about 1 µgal at a half wavelength spatial resolution of λ/2 = 5000 km with a temporal resolution of 1 month. For the GRACE mission a largely increased resolution is expected. Of fundamental interest is the combination of satellite-based and surface gravity measurements.

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