测位卫星用高精度轨道.ppt

測位衛星用高精度軌道?時計決定ソフトウェアの開発Development of Precise Orbit/Clock Determination Software for GPS/GNSS 技術コンサルタント　高須　知二 笠井デザインオフィス　笠井　晶二 Tomoji TAKASU, Shoji KASAI 内容 Contents GT：GPS/GNSS Precise Analysis SW FeaturesStructureModels Accuracy EvaluationGPS Satellite Orbit/ClockStation Pos/Tropos DelayLEO Satellite Orbit GpsTools (GT) ver.0.5.6 特徴 Features GPS/GNSS Precise Analysis Uses Undifferenced Carrier Phase Measurements EKF(Forward/Backward)+Smoother Precise Measurement Models Precise Satellite Orbit Models GUI for Setting/Execution/Utilities Matlab/C Environment/Libraries 構成図 Block Diagram 処理フロー Processing Flow 観測モデル Measurement Models Light-Time Equation Ionos Delay : Ionosphere-Free LC Tropos Delay :ZTD/Gradients+Mapping Function Antenna Phase Center Offset/PCV Site Displacements ：Solid Earth Tide, Ocean Loading etc Phase Wind-up/Relativity Effects 設定 Model Settings 衛星運動モデル Sat Orbit Model Geopotential : JGM-3 Tidal Effect : Solid Earth,Ocean Tide etc 3rd Body : Moon/Sun, DE405 Eclipse : Penumbra/Umbra, Earth/Moon SRP : ROCK4/42, CODE, GSPM etc Relativity : IERS Conventions Nutation/Precession:IAU1980,IERS1996 ERP : IERS Bul.B,C04,IGS,or Estimated 設定 Model Settings 推定パラメータ Estimated Params GPS/GNSS Satellite Orbit GPS/GNSS Satellite Clock Receiver Position (Static/Kinematic) Receiver Clock Tropospheric Delay (ZTD, Gradients) ERP, Geocenter Offset 設定 Parameter Settings GPS衛星軌道?時計決定精度評価GPS Satellite Orbit/Clock Accuracy 条件 Estimation Settings GPS 29 Satellites GPS Week 1291 (2004/10/3-10/9) Unit:24H+Overlap24H, Interval:300sec 3Pass Filter/Smoother Tracking Stations : IGS 40 Stations Elevation Cutoff : 10 deg Station Pos : Fixed to Prev. Week PPP Reference Clock : AMC2 観測局 Stations (IGS 40Stas) 推定パラメータ Estimated Params GPS衛星軌道精度 Orbit Accuracy 衛星毎軌道精度 GPS PRN01軌道精度 GPS衛星時計精度 Clock Accuracy 衛星毎時計精度 GPS PRN01時計精度 IGS AC解比較 Comparisons 測位?対流圏遅延精度評価Position,Tropos Delay Accuracy 条件 Estimation Settings IGS 85 Reference Frame Stations GPS Week 1291 (2004/10