NavTK/TGRS Modeling: - AGI

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ProductsEach set of data includes –Colored tables depicting No-GotimesTabular listing of times whenPDOP =>3 for =>3 seconds(VAFB Safety No-Go Criteria)Sky Plots (nominal only) showingsatellite positions and last 30minutes of movement historyGo/No-Go TableNotional00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 1916:xx 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 3940 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 5900 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 1917:xx 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 3940 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 5900 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 1918:xx 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 3940 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59Sky Plots & Critical Satellite AnalysesAGIChart “PDOP Summary” for eachsecond of flight for each launchtimeSpreadsheet listing of PDOPvalues for each time analyzedChart “Number of Satellites”available over the entire periodanalyzedPg 6 of 10Notionalwww.agi.com
NavTK Mods• Development of PDOP and IIP support for VAFB Range Safetyhas required numerous modifications and additions to NavTK• Receiver modifications to include use of acquisition andthreshold specifications for determining receiverperformance.• Changes to algorithms to support time step increments aslow as 0.05 seconds• Script additions to support automatic execution of very largenumbers of time-phased scenarios• Many other specialized changes required to support the uniquerequirements of this taskAGIPg 7 of 10www.agi.com
Page 1 and 2: NavTK/TGRS Modeling:Automating NavT
Page 3: Challenge• Model GPS satellite co
Page 8 and 9: Custom Applications1. NavTK Outage
Page 10: AGI AssistanceSTEPAL gratefully ack

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