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Improvements of the SOS-Wautomatic scheduler for specialcampaign supportS.Riepl, A. Böer, C.Schade, T.SchülerBundesamt für Kartographie und GeodäsieGeodätisches Observatorium WettzellILRS Technical Workshop October 21-25, 2019 Stuttgart, Germany

Why automated pass scheduling ? Besides satellite acquisition, pass scheduling is the most tedious jobILRS Technical Workshop October 21-25, 2019 Stuttgart, Germany

Pass scheduling parameters Minimum observation time (for SOS-W 60 seconds, including passswitch time)Minimum elevation angle (20 degree)Sun avoidance and earth shadow encounters (for scheduling of lightcurve measurements)Target specific observation time (normal point window)- for geodetic targets 6 normal point windows per pass are allocated,observing session is terminated if maximum number of observationsis reached- LEO targets have highest priority to avoid hidden passagesSystem performance is governed by minimum observation timeILRS Technical Workshop October 21-25, 2019 Stuttgart, Germany

Pass scheduling algorithmILRS Technical Workshop October 21-25, 2019 Stuttgart, Germany

Interleaving featuresILRS Technical Workshop October 21-25, 2019 Stuttgart, Germany

Interleaving features (2)ILRS Technical Workshop October 21-25, 2019 Stuttgart, Germany

Pass scheduling algorithm – typicaldistribution of GNSS observationsILRS Technical Workshop October 21-25, 2019 Stuttgart, Germany

SUCCESS Campaign RequirementsCampaign duration: 2019/05/12-2019/06/02Main Tasks:- Eclipsing satellite passes: Observations of Galileo 102 and 220 satellites during eclipse. Continuousobservation during eclipse phases is encouraged (collection of NPTs with low sample rate is also possible).Furthermore it is suggested to start ranging at least 5-10 minutes before the eclipse. If possible, collect a longpass segment of the pass during which the eclipse is taking place (description see below, selected eclipsepasses are 5 -7 hours long).- Long pass segments: Collect one normal point of the above Galileo satellites every 15 minutes, for the wholepass (as long as possible).- Simultaneous observations: Two or more stations observe the same Galileo satellite simultaneously for e.g. 1530 minutes continuously.ILRS Technical Workshop October 21-25, 2019 Stuttgart, Germany

Pass scheduling algorithm withpredefined 1:0022:18:0021:46:0014:01:0020:31:00ILRS Technical Workshop October 21-25, 2019 Stuttgart, ileo220galileo102galileo220galileo22010 300 900 60010 30010 30010 30010 300900 600900 600900 600900 60010 300 900 60010 300 900 60010 300 900 60010 30010 30010 30010 30010 30010 30010 30010 30010 30010 300900 600900 600900 600900 600900 600900 600900 600900 600900 600900 600

Partial Schedule Gantt Graph forSUCCESS CampaignILRS Technical Workshop October 21-25, 2019 Stuttgart, Germany

SUCCESS Campaign Observationsovercasted skyILRS Technical Workshop October 21-25, 2019 Stuttgart, Germany

Conclusion Automatic Scheduling optimizes observing geometryAutomatic Scheduling provides objective target selectionAutomatic Scheduling does very nice pass interleavingImplementation of predefined schedule permits realisation ofarbitrary tracking scenariosSpecial observation campaigns can be programmed in advancePredefined Scheduling will be used intensively in upcomingdouble difference campaignsILRS Technical Workshop October 21-25, 2019 Stuttgart, Germany

Improvements of the SOS-W automatic scheduler for special campaign support S.Riepl, A. Böer, C.Schade, T.Schüler Bundesamt für Kartographie und Geodäsie Geodätisches Observatorium Wettzell. ILRS Technical Workshop October 21-25, 2019 Stuttgart, Germany Besides satellite acquisition,