during station visibility. 3GM_HAA_STANDBY should start at least 48 hours before 3GM_GRAVITY starts if not already scheduled in parallel (ideally this should only be the case for the first flyby and at the start of GCO500, or in case of resources limitations) and end no earlier than when the last 3GM_GRAVITY ends. Default is that HAA STANDBY is always running. 3GM_GRAVITY should be scheduled for 3 consecutive communication passes centered around flyby C/A. If not PRIME, MGA is used. This observation should be preceded by 3GM_HAA_CALIBRATION
any rule that is used to schedule the observation: repetition rules, continuous (plasma instruments), one-off, every orbit, every day, etc