Abstract During the Mars solar conjunction, telecommunication and tracking between the spacecraft and the Earth degrades significantly. The radio signal degradation depends on the angular separation between the Sun, Earth and probe (SEP), the signal frequency band and the solar activity. All radiometric tracking data types display increased noise and signatures for smaller SEP angles. Due to scintillation, telemetry frame errors increase significantly when solar elongation becomes small enough. This degradation in telemetry data return starts at solar elongation angles of around 5° at S-band, around 2° at X-band and about 1° at Ka-band. This paper presents a mathematical model for predicting Mars superior solar conjunction for any Mars orbiting spacecraft. The described model is simulated for the Mars Orbiter Mission which experienced Mars solar conjunction during May–July 2015. Such a model may be useful to flight projects and design engineers in the planning of Mars solar conjunction operational scenarios.
Highlights A mathematical model is described to predict Mars solar conjunction. Model is simulated for the Mar Orbiter Mission. Mathematical model can be utilized to predict Mars superior conjunction for any Mars orbiting spacecraft.
Mars solar conjunction prediction modeling
Acta Astronautica ; 118 ; 246-250
2015-10-21
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Mars solar conjunction prediction modeling
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