By Erik R. Ivins, Eric Rignot, Xiaoping Wu, Thomas S. James, Gino Casassa (auth.), Prof. Dr. Dr. Christoph Reigber, Prof. Dr. Hermann Lühr, Dr. Peter Schwintzer, Dr. Jens Wickert (eds.)
In the summer time of 2000 the German geo-research satellite tv for pc CHAMP used to be embarked on orbit. Its cutting edge payload association and the low preliminary orbit let CHAMP to concurrently acquire and nearly regularly examine certain info in relation to gravity and magnetic fields at low altitude. furthermore, CHAMP additionally measures the impartial surroundings and ionosphere utilizing GPS concepts. 3 years after release, greater than two hundred CHAMP investigators and co-investigators from world wide met on the GeoForschungsZentrum in Potsdam to offer and talk about the consequences derived from the wide info units of the undertaking. the most consequence of this professional assembly is summarized during this quantity. The booklet bargains a finished perception into the current prestige of the exploitation of CHAMP info for Earth process study and sensible purposes in geodesy, geophysics and meteorology.
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Additional resources for Earth Observation with CHAMP: Results from Three Years in Orbit
Figure 1 shows the comparison result. Each station is represented by one box with two graphs. The upper part displays the SG measured gravity variations (grey) and the monthly averages (black). The lower part shows the CHAMP derived gravity variations (black) and again the monthly averages of the SG gravity variations (grey). For a the better visualisation the curves are created about their mean values. The comparison shows a reasonable agreement in the trend behaviour of the gravity variations for all stations: For the stations with large variations (Metsahovi, Wuhan and Matsushiro) the CHAMP solution follows quite well the SG result too.
It could be proved that the SG-derived temporal gravity variations are representative for a large area within the µgal accuracy, if the local gravity effects are removed.. The long-periodic tidal waves are well determined by ground measurements, therefore they can be applied as a reference for validation. g. 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.
In Figure 3 the EIGEN-2 is superior to TUM-1S - compare also Table 2. In other regions TUM-1S has slightly lower RMS values than EIGEN-2 (Table 2 and Table 3). CS44 set is slightly better than EIGEN-2 model, due to the extended one-year data set. The cs45 set performed better than EIGEN-2 model at all the degrees, and exhibits characteristic similarities with the EIGEN-GRACE01S model. 5 Conclusion Based on the tests in the previous section we conclude that (1) EIGEN2, TUM-1S and cs44 show similar error characteristics (cf.