Download First CHAMP Mission Results for Gravity, Magnetic and by Ludwig Grunwaldt, Thomas K. Meehan (auth.), Professor Dr. PDF

By Ludwig Grunwaldt, Thomas K. Meehan (auth.), Professor Dr. Christoph Reigber, Professor Dr. Hermann Lühr, Dr. Peter Schwintzer (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 intial orbit let CHAMP to concurrently gather and virtually consistently examine certain info in relation to gravity and magnetic fields at low altitude. as well as this CHAMP additionally measures the impartial surroundings and ionosphere utilizing GPS techniques.

Eighteen months after the release, CHAMP examine teams from worldwide met on the Geo-Forschungs-Zentrum in Potsdam for an preliminary alternate of stories and effects. the most end result of this person assembly is summarized during this quantity. except technical information regarding the undertaking, the booklet bargains a accomplished perception into the current prestige of CHAMP info exploitation for Earth approach learn and functional functions in geodesy, geophysics and meteorology.

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4th ESA International Conference on Spacecraft Guidance, Navigation and Control Systems, ESTEC, Noordwijk (Netherlands) CHAMP Clock Error Characterization Rolf Konig, Karl Hans Neumayer, Grzegorz Michalak, and Ludwig Grunwaldt GeoForschungsZentrum Potsdam, Telegrafenberg, D-14473 Potsdam, Germany, koenigr@gjz-potsdam. de Summary. The behaviour of the steered quartz clock of the "Blackjack" GPS receiver on-board CHAMP is characterized. The receiver clock estimates from onground orbit determination and clock offsets as reported within the CHAMP navigation solution are presented, compared, and discussed.

5. Star sensor measurement and errors derived by kalman filtering available, the star sensor pointing angles were interpolated by a polynomial fit in order to obtain a continuous measurement signal. Differences of pointing angles measured by the star sensor and the estimated pointing angle by the KALMAN filter are shown at the right side of Fig. 5. They represent the star sensor error at higher frequencies. The derived star sensor measurement noise is given in Table 1. Table 1. Star sensor measurement noise [rad/-/HZl attitude angle roll pitch yaw 1 ASC head 2 ASC head le-5 5e-5 5e-5 8e-6 le-5 le-5 Additionally in Fig.

5. Star sensor measurement and errors derived by kalman filtering available, the star sensor pointing angles were interpolated by a polynomial fit in order to obtain a continuous measurement signal. Differences of pointing angles measured by the star sensor and the estimated pointing angle by the KALMAN filter are shown at the right side of Fig. 5. They represent the star sensor error at higher frequencies. The derived star sensor measurement noise is given in Table 1. Table 1. Star sensor measurement noise [rad/-/HZl attitude angle roll pitch yaw 1 ASC head 2 ASC head le-5 5e-5 5e-5 8e-6 le-5 le-5 Additionally in Fig.

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