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GANYMEDE_WAKE
GANYMEDE_WAKE
In situ Ganymede wake observation
CReMA 3.0, CReMA 3.1, CReMA 3.2, CREMA_5_0, CREMA_5_0b23_1, CREMA_5_1_150lb_23_1, CREMA_5_1_150lb_23_1_a3, CREMA_5_1_150lb_23_1_b2
False
Working Group 3

Pointing

-

Scheduler

None
-

Observation Definitions

PEP_JUPITER_IN_SITU_NOMINAL_1, PEP_JUPITER_IN_SITU_IMAGING_NOMINAL_1, PEP_JUPITER_IN_SITU_IMAGING_BURST_1, PEP_GANYMEDE_IN_SITU_LOW_1, PEP_JUPITER_IN_SITU_BURST_1, PEP_GANYMEDE_IN_SITU_LOW_5, PEP_GANYMEDE_IN_SITU_NOMINAL_3, PEP_GANYMEDE_IN_SITU_LOW_6, PEP_GANYMEDE_IN_SITU_LOW_7, PEP_GANYMEDE_IN_SITU_LOW_8

Advanced

Spacecraft downstream of moon with respect to corotating plasma flow.
Spacecraft within 15 degrees jovigraphic longitude of moon location.
Spacecraft on dipole L-shell within 0.11 of dipole L-shell of moon orbital path.
Opportunity implementation in geo-pipeline:
whenever the flag traj_data."moon"_wake is > 0
Computation of the moon_wake flag is done as follow:

;;
;; The moon wake observation condition has three components (in order of importance):
;; i) SC downstream of moon with respect to corotation direction
;; ii) <= 15 degrees jovigraphic longitudinal separation
;; iii) a miniumum dipole L-shell separation of SC from moon orbital path
;;
;; INPUT: t_et - ephemeris time
;; sc - spacecraft e.g. JUICE
;; moon - name of the moon being considere (Galilean moons except Io)
;;
;; OUTPUT: moon_wake_obs - boolean stating whether or not the condition
;; observation condition is met. 1 OR FALSE .
;;
;; J.N.Yates 18/08/2017 v1.0

UPDATE FOR TRAJECTORY A3:
absolute time opportunity inputs provided by WG3 in https://s2e2.cosmos.esa.int/confluence/display/SPL/JUICE+Trajectory+Options
(GANYMEDE_WAKE_CROSSINGS_juice_crema_5_1_150lb_23_1_a3.tm_Method_1.dat)
filtered for diff_lon < 30 deg