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Ian_885_presentation - A Comparison of Static GPS Baseline...

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A Comparison of Static GPS Baseline Solutions Using Trimble’s Geomatics Office (TGO) by Ian Grender, MS student, CEEGS January 2002
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TGO BASELINE PROCESSING
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TGO BASELINE PROCESSING REPORT • A Baseline Processing Report was produced within TGO for each solution. The statistics, measurements, and estimated parameters contained in the reports are used as the basis for comparison.
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ELEMENTS OF THE BASELINE PROCESSING REPORT
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Baseline (~ 200m)
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Example Baseline Processing Report
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Satellite Phase Tracking Summaries
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Residuals
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PDOP & # of Satellites
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ANALYSIS
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TGO Solutions (10 Total) L1 Code L2 Code L1 Phase Fixed & Float L2 Phase Fixed & Float Wide Lane Fixed & Float Narrow Lane Fixed & Float
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Time Duration Windows Each solution type was employed in three separate time windows. * 10 Minutes * 1 Hour * 3 ½ Hours
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SOLUTIONS WIde Lane Float Wide Lane Fixed Narrow Lane Float Narrow Lane Fixed L2 Phase Float L1 Phase Float L2 Phase Fixed L1 Phase Fixed L2 Code L1 Code 10 Minutes WIde Lane Float Wide Lane Fixed Narrow Lane Float Narrow Lane Fixed L2 Phase Float L1 Phase Float L2 Phase Fixed L1 Phase Fixed L2 Code L1 Code 1 Hour WIde Lane Float Wide Lane Fixed Narrow Lane Float Narrow Lane Fixed L2 Phase Float L1 Phase Float L2 Phase Fixed L1 Phase Fixed L2 Code L1 Code 3 - 1/2 hours
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Comparison Methodology Comparison of each particular solution across three time windows. Comparison of ten different solutions within each of the three time windows.
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SOLUTIONS WIde Lane Float Wide Lane Fixed Narrow Lane Float Narrow Lane Fixed L2 Phase Float L1 Phase Float L2 Phase Fixed L1 Phase Fixed L2 Code L1 Code 10 Minutes WIde Lane Float Wide Lane Fixed Narrow Lane Float Narrow Lane Fixed L2 Phase Float L1 Phase Float L2 Phase Fixed L1 Phase Fixed L2 Code L1 Code 1 Hour WIde Lane Float Wide Lane Fixed Narrow Lane Float Narrow Lane Fixed L2 Phase Float L1 Phase Float L2 Phase Fixed L1 Phase Fixed L2 Code L1 Code 3 - 1/2 hours
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Analysis of Results Analysis is based upon a number of elements. * Baseline Length * Standard Deviation of Baseline Length * RMS * Reference Variance * Variance Ratio
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Baseline Length
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The Baseline Length is simply the magnitude of the solution vector. The Standard Deviation of the baseline length is defined as usual. The units are meters.
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Baseline Distances Baseline Distances 196.05 196.10 196.15 196.20 196.25 196.30 196.35 196.40 196.45 196.50 196.55 196.60 196.65 196.70 196.75 L1 CODE L2 C O DE L1 P H AS E FI X E D L1 P HAS E FLO AT L2 P H ASE FI X ED L2 PHAS E F LO AT N A RR O W L AN E FI XE D NA R ROW LA N E F LOA T W IDE LAN E FI X ED W I DE LANE FLOA T
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