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Staus of MORE and BepiColombo

Staus of MORE and BepiColombo. MORE: instrument PDR completed (27 Nov. 2008) EID-B close to completion Test and Calibration Plan: work in progress; issue 1 expected for next PM in June Ground station: some progress on the use of SRT (Sardinia Radio Telescope); no NASA support at the moment

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Staus of MORE and BepiColombo

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  1. Staus of MORE and BepiColombo

  2. MORE: instrument PDR completed (27 Nov. 2008) EID-B close to completion Test and Calibration Plan: work in progress; issue 1 expected for next PM in June Ground station: some progress on the use of SRT (Sardinia Radio Telescope); no NASA support at the moment Concerns: wheel desaturation manouuvers every 12 h, with large delta-V (5 cm/s) Payload switch off near Mercury’s pericenter, X/Ka link off at pericenter MORE Status MORE DPDR 27-28 Nov. 2008

  3. BOT EOT DSM1 max effect DSM2 BOT 0h 8h 10h 16h 22h 24h Wheel Desaturation (communication from R. Schulte) x along track, y radial (nadir), z out of plane nominally zero, due to thruster orientation Calibration of possible to 5% Sequence Of Events: T1 T2 T3 T0 T4 MORE DPDR 27-28 Nov. 2008

  4. Summary of effects Displacements after 6 h from manoeuvers, in meters, assuming knowledge of DV to 5% MORE DPDR 27-28 Nov. 2008

  5. Effects of residual DVx Along-track, residual DV does affect the SC orbit : To fix ideas, let us assume Δx = 10 m; then knowledge of ΔVx is required to: Assuming calibration to 30%, the allowed, residual along-track DV (constraining the displacement uncertainty to 10 m) is 0.5 mm/s MORE DPDR 27-28 Nov. 2008

  6. Requirements • RSE-SPR to be updated with new requirements. • minimum interval between DSM is 12 h • knowledge of DVmust be at the minimum level of 0.15 mm/s • along track (x), 0.8 mm/s radial (y) and 2.1 mm/s normal (z) MORE DPDR 27-28 Nov. 2008

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