Constellation Status of the Swarm Mission - Discussion

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Presentation on theme: "Constellation Status of the Swarm Mission - Discussion"— Presentation transcript:

1 Constellation Status of the Swarm Mission - Discussion
Detlef Sieg 12/10/2018

2 Altitude Evolution (Medium Solar Activity)
B 500 km Dv 17m/s Dv 15m/s 450 km Semi major axis [km] (osculating at ascending node) A/C Dv 20m/s 400 km Altitude: Continue with and monitor natural decay (-10km during next 3 years) Action needed when next solar cycle starts, probably 2021 or 2022.

3 Out-of-plane Evolution DLTAN C-A
A: Δi=+7.5mdeg C: Δi= -7.5mdeg 23.Oct.2019 Δi of 7.5mdeg requires Δv=1m/s DLTAN C-A [h] A/C to perform same Δv No fuel balancing 25.Sep.2021 1.9y mistake

4 Swarm-A Grace FO D=12h LTAN [h] Swarm-B DLTAN C - A [h] 1.9y Oct.2019
87.3deg / deg 87.7 505km 431km equator B A 87.7deg C 5 deg 600 km Swarm-A Grace FO D=12h LTAN [h] Swarm-B Δi=7.5mdeg 1.9y Oct.2019 Sep.2021 latitude [deg] DLTAN C - A [h] Δv=1m/s

5 Out-of-plane Evolution
Shall the DLTAN between Swarm-A and Swarm-C get reduced from 0.1h to cross through 0.0h in Sep. 2021? When shall the drift be started? How long shall the drift continue after the crossing through zero? What is the best separation for the lower pair during counter rotating orbits? Fuel budget 70 m/s Orbit raise (average solar cycle) 52 m/s Counter rotating orbits. Equal LTAN 3 m/s Yearly attitude control 1 m/s


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