High-dynamic baseline determination for the Swarm constellation
作者： X. Mao , P.N.A.M. Visser , J. van den IJssel
DOI: 10.1016/J.AST.2019.03.031
关键词:
摘要: Baseline determination for the European Space Agency Swarm magnetic field mission is investigated. consists of three identical satellites -A, -B and -C. The Swarm-A -C form a pendulum formation whose baseline length varies between about 30 180 km. Swarm-B flies in higher orbit, causing its orbital plane to slowly rotate with respect those This special geometry results short periods when satellite adjacent other satellites. Ten 24-hr around such close encounters have been selected, lengths varying 50 3500 All carry high-quality, dual-frequency Global Positioning System receivers not only allowing precise orbit single satellites, but also rigorous assessment capability These baselines include high-dynamic two For all determinations, use was made an Iterative Extended Kalman Filter approach, which could run single-, dual-, triple-satellite mode. Results showed that resolving issue half-cycle carrier phase ambiguities (present original release GPS RINEX data) reducing code observation noise by German Operations Center converter improved consistency reduced-dynamic kinematic solutions both Swarm-A/C pair combinations modes led comparable consistencies computed laser ranging observations at level 2 cm. In addition, single-satellite ambiguity fixed are levels modes, 1-3 mm 3-5 Swarm-B/A -B/C pairs different directions.
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