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Mnemonic:

MAJ_BORESIGHT_ALIGNEMENT

Name:

MAJ_BORESIGHT_ALIGNEMENT

Description:

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

Payload:

MAJIS

Pointing

Pointing Type:

inertial

Target:

PTRSnippet file:

Advanced

Scheduling Rules:

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

Avoidance Rules:

TBD

conditions that make the observation not possible (e.g. thruster firing)

Comments:

#update2022May18

Support Plot 1:

Support Plot 2:

Support Plot 3:

Commanding

ITLSnippet file:

Related segment definitions

	Segmentdefinition
Segment	CAL
Segment	STAR_OCC_OBS
Segment	MAJIS_OBSERVATION
Segment	MAJIS_PRIME_OBSERVATION

Power profiles

	Event	Time	Mode	User Defined Power (Watts)	Comment
Start 00:00:00 SCIENCE_MAX 26.7 [Watt]	Start	00:00:00	SCIENCE_MAX	-

Data profiles

	Event	Time	Mode	User Defined Data Rate (bit/s)	Comment
Start 00:00:00 User Defined 650000.0 [bit/s]	Start	00:00:00	User Defined	650000.0	65 to 650 kbits (no process 1024xPPE with PPE=64, 5 bits/element, 2 channels, depends on the star) No reduction factor

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