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MAJ_BORESIGHT_ALIGNEMENT
MAJ_BORESIGHT_ALIGNEMENT
Star sequence for geometrical calibration.
A star is initially pointed using the MAJIS boresight, then MAJIS is operated with the scan mechanism at high resolution (1/3 of IFOV) over 18 lines centered in the star. Then this operation is successively observed after 4 S/C repointings of 1.5° around X and Y.
Pointing : inertial
Satellite orientation: S/C pointing the star and MAJIS scans
Duration: 18 to 180 sec per position (5 positions in total)+ stabilization time for repointing not taken into account
MAJIS

Pointing

inertial
-

Advanced

Once per year A star like Arcturus or equivalent type/magnitude can provide enough signal for the measurement.
any rule that is used to schedule the observation: repetition rules, continuous (plasma instruments), one-off, every orbit, every day, etc
TBD
conditions that make the observation not possible (e.g. thruster firing)
#update2022May18

Commanding

Related segment definitions

Segmentdefinition

Segment

CAL

Segment

STAR_OCC_OBS

Segment

MAJIS_OBSERVATION

Segment

MAJIS_PRIME_OBSERVATION

Power profiles

Event Time Power (Watts) Comment  (Comment when exported to observation definition file)

Data profiles

Event Time Data flow Data Rate (bit/s)  (Data rate) Comment  (Comment when exported to observation definition file)

Start 00:00:00 650000.0 [bit/s]

Start

00:00:00

-

650000.0

65 to 650 kbits (no process 1024xPPE with PPE=64, 5 bits/element, 2 channels, depends on the star)
No reduction factor

Parameters

Key Value
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