Abstract
Doppler and ranging measurements, using the radio signals of the Giotto spacecraft and taken during the encounter with comet Halley, reveal a definite deceleration of the spacecraft due to drag in the cometary atmosphere. The total change in the radial velocity of the spacecraft was measured to be 16.7 cm s−1, occuring over a time interval of ∼100 s and corresponding to a shift in Doppler frequency of 4.7 Hz. Using this velocity change, estimates of the total cometary mass striking the spacecraft range from 0.1 to 1 g.
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References
Edenhofer, P. et al. Eur. Space Ag. spec. Publ. 1077, 173–186 (1986).
Bird, M. K., Edenhofer, P., Porsche, H. & Volland, H. Adv. Space Res. 4, 303–306 (1984).
Porsche, H. & Edenhofer, P. in Cometary Exploration Vol. 3 (ed. Gombosi, T.) 185–195 (Central Research Institute for Physics, Budapest, 1982).
McDonnell, J. A. M. et al. Adv. Space Res. 4, 297–301 (1984).
Balsiger, H. et al. Nature 321, 330–334 (1986).
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Edenhofer, P., Bird, M., Brenkle, J. et al. First results from the Giotto Radio-Science Experiment. Nature 321 (Suppl 6067), 355–357 (1986). https://doi.org/10.1038/321355a0
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DOI: https://doi.org/10.1038/321355a0
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