On One-way Doppler Measurements of Space Craft and Celestial Objects
Jochim, Fritz (2010) On One-way Doppler Measurements of Space Craft and Celestial Objects. Acta Astronautica, Volume 66 (1 - 2), pp. 309-330. Elsevier. DOI: 10.1016/j.actaastro.2009.09.001. ISSN 0094-5765.
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The orbital velocity of a spacecraft and other celestial objects is monitored by observing the Doppler frequency shift of the signals received at the ground station. This is possible one-way in case the transmitted frequency is stable enough. In most spacecraft a calibrated transponder allows two-way Doppler frequency registrations. In general, the factor 2 is expected as the quotient between two- and one-way frequencies. However, this is no longer the case when the motion of the observed object deviates from the orbit as predicted. Frequency differences appear. Porsche (1999) has published a formula to describe these differences based on the assumption of a double projection of the true velocity vector. In the present paper a more sophisticated analysis of the influence of state errors on the track-ing results is deduced. This theory has been tested by the Doppler measurements during flybys of the comet space probe GIOTTO penetrating through the comae of the comets P/Halley and P/Grigg-Skjellerup. One-way Doppler measurements of the low Earth satellites CHAMP and TERRASAR-X show a tendency for the applicability of this approach. Finally, some conse-quences for the observation of other celestial objects are discussed.
|Title:||On One-way Doppler Measurements of Space Craft and Celestial Objects|
|Journal or Publication Title:||Acta Astronautica|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 309-330|
|Keywords:||One way Doppler measurements Interplanetary missions Giotto Satellite tracking Spacecraft state perturbation|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EO - Erdbeobachtung|
|DLR - Research area:||Space|
|DLR - Program:||W EO - Erdbeobachtung|
|DLR - Research theme (Project):||W - Projekt sicherheitsrelevante Erdbeobachtung (old)|
|Institutes and Institutions:||Microwaves and Radar Institute > Reconnaissance and Security|
|Deposited By:||Thomas Neff|
|Deposited On:||05 Feb 2010 07:13|
|Last Modified:||07 Feb 2013 20:48|
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