Details

Autor(en) / Beteiligte

• Belonenko, A. V.
• Gusev, A. V.
• Rudenko, V. N.

Titel

Precision Measurement of Gravitational Frequency Shift of Radio Signals Using Rao-Cramer Estimates

Ist Teil von

• Gravitation & cosmology, 2021-10, Vol.27 (4), p.383-391

Ort / Verlag

Moscow: Pleiades Publishing

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A method has been developed for precision measurement of the gravitational frequency shift of communication radio signals between a spacecraft and a ground tracking station, based on the maximum likelihood principle, using the Rao-Cramer limit estimates for the kinematic parameters associated with orbital motion. Numerical illustrations of the efficiency of the method are presented using the example of data obtained in experiments with the Spektr-R satellite as part of the VLBI system in the Radioastron mission. A compensatory “on-line” technique for suppressing Doppler and atmospheric noise has been implemented due to the presence of two modes of communication in gravity sessions: unidirectional (1w) and looped (2w). Recipes for reducing the magnitude of systematic errors are discussed.