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First results from the Giotto radio-science experiment (1986)

Buschert, H. ; Esposito, P. B. ; Edenhofer, P. ; [et al.]

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Publication Date: 2011-08-19

Description: A definite deceleration of the comet probe Giotto due to drag in the comet Halley atmosphere has been noted by means of Doppler and ranging measurements based on the radio signals of the Giotto spacecraft. The total radial velocity change is 16.7 cm/s over a 100-s interval; this corresponds to a Doppler frequency of 4.7 Hz. This velocity change is used to estimate a total cometary mass striking the spacecraft of between 0.1 and 1.0 g.

Keywords: SPACE COMMUNICATIONS, SPACECRAFT COMMUNICATIONS, COMMAND AND TRACKING

Type: Nature (ISSN 0028-0836); 321; 355-357

Format: text

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