The orbit of the satellite Ariel 4 /1971-109A/

Details The orbit of the satellite Ariel 4 /1971-109A/ The orbit of the satellite Ariel 4 /1971-109A/

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jbis...31..168g&link_type=abstract

British Interplanetary Society, Journal (Orbital Dynamics), vol. 31, May 1978, p. 168-175.

Computer Science

Ariel 4 Satellite, Orbit Calculation, Orbital Elements, Satellite Orbits, Eccentricity, Position Errors, Resonance, Tesseral Harmonics

Scientific paper

The definitive orbit of Ariel 4 has been computed from Minitrack observations for the two periods during which orbital parameters were required for use in telemetry analysis - from December 1971 (launch) to May 1973 and from October 1973 to December 1973. The orbit was represented by a model with eight independent orbital parameters, and 194 sets of values of these parameters were determined at three-day intervals. The accuracy was much the same for all the determinations, being about 4 millionths in eccentricity and 2 arcsec for the angular parameters; this would correspond to a nominal position accuracy of about 120 m in using the orbital parameters, though the actual errors may have approached 500 m at times, arising from perturbations due to unmodeled tesseral harmonics.

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