Measurement technique of the Giotto radio science experiment

Details Measurement technique of the Giotto radio science experiment Measurement technique of the Giotto radio science experiment

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jphe...20..768e&link_type=abstract

Journal of Physics E - Scientific Instruments (ISSN 0022-3735), vol. 20, pt. 2, June 1987, p. 768-776.

Physics

2

Comet Tails, Doppler Effect, Electron Density Profiles, Giotto Mission, Halley'S Comet, Radio Signals, Electromagnetic Radiation, Frequency Shift, Interplanetary Dust, Measuring Instruments, Radio Transmission, Spacecraft Trajectories

Scientific paper

The paper describes the technique used to record time delay and waveform measurements for the Giotto radio science experiment of ESA's mission to comet Halley. The data were taken by using either two-way measurements (during pre- and post-encounter) or one-way measurements (during encounter with comet Halley), the downlink of the radio signal of the Giotto spacecraft being received at 8.4 GHz by the 64 m tracking stations of NASA's Deep Space Network (DSN). The waveform measurements were obtained at a sampling frequency of 50 kHz with an open-loop receiver assembly at DSN station Canberra as recently used for the Voyager/Uranus fly-by. Performance and calibration data are given as relevant to the radio subsystems on the ground and aboard Giotto.

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