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ILRSTechnicalWorkshopRiga1-6Oct,2017(McGarry) 1
Space Geodesy Satellite Laser Ranging
JanMcGarry1,HowardDonovan2,JulieHorvath2,JohnCheek3,EvanHoffman1,RandallRicklefs4,ChristopherClarke2 ,AnthonyMann2,ScottWetzel2,JohnDegnan3
1NASAGoddardSpaceFlightCenter2KBRwyle (formerlyHTSI)3SigmaSpaceCorporation4CybiomsCorporation
PlansforafullyautomatedSGSLRsystem
ILRSTechnicalWorkshopRiga1-6Oct,2017(McGarry) 2
Abstract
TheSpaceGeodesySatelliteLaserRangingsystem(SGSLR)isbeingdesignedwiththegoaloffullautomation. LessonslearnedonNGSLRand othersystems arebeingimplementedinSGSLR. AutomationwillbeachievedinstageswiththefirststagebeingremoteoperationalcapabilityattheMcDonaldandNy-Alesund SGSLRsystemswhenmanyoftheoperationaltaskswillalreadybeautomated. Ultimately,SGSLRwillsendscienceandmonitoringdatato,andreceivecommandsfrom, theSpaceGeodesyNetworkOperationCenter (SGNOC),similartothewayspacecraftnowoperate. Thehardwareandsoftwareneededto achievefullautomation,andthestagesof implementationwillbediscussed.
ILRSTechnicalWorkshopRiga1-6Oct,2017(McGarry) 16
PartII:Future
ILRSTechnicalWorkshopRiga1-6Oct,2017(McGarry) 17
AdditionalFunctionsforFarRemote
u Needskycameratoviewinbothdayandnightandwillneedtosendskyimagestoremoteoperator(thisfunctionshouldbeoperationalin2018)
u Needsecuremethodforoperatortosendrequesttohardwaretore-enablethelaser,orwillneedforU.S.FederalAviationAdministrationtoallowsoftwaretosendrequesttore-enablethelaser
u PrimarysafetyandsecurityresponsibilitywillstillliewithoperatorBUTthehardware/softwarewillnowstarttoperformthesefunctionsinparallel
ILRSTechnicalWorkshopRiga1-6Oct,2017(McGarry) 18
AdditionalFunctionsforFullAutomation
u Skycameraimagesmustbeautomaticallyanalyzedtodeterminewheretherearecloudsandwhereitisclearenoughtorange.Softwaremustbeabletochangetargettrackedtooneincleararea.
u Softwaremustbeabletorequestthatthehardwarere-enablethelaserafterblockingitforanaircraftavoidancesituation.
u SoftwareITSecuritymusthavebeentestedandproven.u SGSLRsystemhardware/softwaremustbeprimarilyresponsibleforsafetyandsecurity.
ILRSTechnicalWorkshopRiga1-6Oct,2017(McGarry) 19
TallPolesforFullAutomationandhowweareworkingtosolvethem
u ParticipatingonanFAARegulationCommitteeandleadingtheefforttomodifytheregulationsforoutdoorlaserusetoincludeautomatedlaseroperations.Neededtobeabletore-enablethelaserwithoutahuman.
u PlanninganddesigningthecomputersystemstoensuretheyarecompliantwithincreasinglystringentNASA(andNorwegian)ITSecurityrequirements.Automatedsystemsmustbeextremelysecure.
u Workingtowardautomatedcloudrecognitionalgorithmandsoftware.Weneedtoautomaticallydeterminewhentoswitchtrackingtoanotherpartofthesky.
u Workingourwaythroughthedecisionpathsandwhat-ifsofanautomatedsystemtoensurewehaveallofsafetyandallofsecurityplannedforandcovered,andgettherequiredNASAapprovals.
ILRSTechnicalWorkshopRiga1-6Oct,2017(McGarry) 20
ComputerArchitectureforITSecurity
ILRSTechnicalWorkshopRiga1-6Oct,2017(McGarry) 21
PathtoFullAutomationu Initialoperationduringinstallationwillbelocal(operatorin
theSGSLRshelteroperatingsystemthroughRAT).u Duringcommissioningthesystemisexpectedtoberemotely
operatedfromnearbySGPoperationsbuildingusingRemoteAccessTerminal(RAT).Testingoftheautomatedoperationswilltakeplacepart-timewiththeoperatorwatchingandpart-timeonitsown.
u Aftercommissioningthesystemswillbeoperatedremotelyformultipledaylightshiftsperweek,whileallowingthesystemtoperformautomatedoperations,mostlyatnight.
u Theknowledgegainedduringtheseperiodswillallowoptimizationoftheautomatedoperationsresultinginfullautomationinthefuture.
Inallcasesdataflowsto/fromtheSGNOC
ILRSTechnicalWorkshopRiga1-6Oct,2017(McGarry) 22
FullAutomationatSGSLRu ThereisnohumanoperatorforanySGSLRstation.u AhumanmonitorstheSpaceGeodesyNetworkattheSGNOCor
partnerNOC:24x7initially,thenperhaps8x5withtheSGNOCperformingautomated“withoutanyhuman”operations,monitoringperformanceandsendingoutalerts/alarms.
u EngineersatGoddardpickupreportsintheiremailsonwhathappenedateachsystemandthepreviousdayperformance,aswellastrendsoverthelastweek,month,year.
u Engineershavethecapabilitytoremotelystopoperationsatastationandtorunremotediagnostics.
u On-sitetechniciansperformroutinemaintenanceonSGSLRandVGOS.Ifneeded,engineerscantalktechniciansthroughmorediagnosticsandsomerepairs,watchingthroughstreamingvideo.Mostsubsystemswillbedesignedtohavecomponentsreplacedwithon-sitesparesorsparesshippedfromthecentralfacility.