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Mnemonic:

3GM_IO_PLASMA_TORUS_OCCULTATION

Name:

3GM_IO_PLASMA_TORUS_OCCULTATION

Description:

The radio science experiment 3GM will use navigation data in X/X and X/Ka band to characterize the Io plasma torus. The data generated by the DST in 2-way dual-frequency radio links will be the primary observable to perform this investigation. Occultations occur throughout the jovian tour, but their phasing is not always synchronized with the timing of dedicated Jupiter observations by the other orbiter experiments. USO will stay MUTED and HAA in nominal SCIENCE.
Note that other observation strategy would be possible (2-way triple link, 1-way X and Ka link with USO UNMUTED).

Payload:

3GM

Pointing

Pointing Type:

track

Target:

PTRSnippet file:

Advanced

Scheduling Rules:

HAA should be in CONFIGURATION mode and scheduled in the background (TO BE SCHEDULED BY SOC AT PLANNING SET-UP). If HAA is OFF, HAA needs to be ON at least 48hours before measurement starts. Occultation observations are event-driven and defined by the Earth-SC line crossing the Io plasma torus. Note that the occultation event shall include a 1-hour margin at the beginning and at the end to serve as a baseline for radiometric measurements. This observation should be preceded by 3GM_HAA_SELF_CALIBRATION 1 hour before the start of the observation.

any rule that is used to schedule the observation: repetition rules, continuous (plasma instruments), one-off, every orbit, every day, etc

Avoidance Rules:

N/A

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

Comments:

Support Plot 1:

Support Plot 2:

Support Plot 3:

Commanding

ITLSnippet file:

Power profiles

	Event	Time	Power (Watts)	Comment
Start -01:00:00 17.8 [Watt]	Start	-01:00:00	17.8	This is total power for 3GM instrumentation. Note that USO and HAA are considered always ON in the background. HAA from CONFIGURATION to SELF_CALIBRATION.
Start 00:00:00 17.8 [Watt]	Start	00:00:00	17.8	This is total power for 3GM instrumentation. Note that USO and HAA are considered always ON in the background. HAA from SELF_CALIBRATION to SCIENCE.
End 00:00:00 17.8 [Watt]	End	00:00:00	17.8	This is total power for 3GM instrumentation. Note that USO and HAA are considered always ON in the background. HAA from SCIENCE to CONFIGURATION.

Data profiles

	Event	Time	Data flow	Data Rate (bit/s)	Comment
Start -01:00:00 SELECTOR 50.0 [bit/s]	Start	-01:00:00	SELECTOR	50.0	HAA in SELF_CALIBRATION
Start 00:00:00 SELECTOR 1594.0 [bit/s]	Start	00:00:00	SELECTOR	1594.0	HAA in SCIENCE
End 00:00:00 SELECTOR 50.0 [bit/s]	End	00:00:00	SELECTOR	50.0	HAA in CONFIGURATION

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