Files needed for processing Initial orbit information Sources Broadcast ephemeris from receivers SP3 orbit files from IGs GAMIT g-files Earth Orientation Parameters(EOP)files Orbit integration in inertial space Satellite clock files (j-files) Ocean tide files 04/3003 12540Lec20 Files continued Moon and Sun ephemeredes orbit integration solid earth tid leap-second file(Utc versus AT Satellite information files GPS antenna information(phase center) Information about stations(coordinates receiver/antenna types and heights) Control files for GAMIT. Two major ones are caller sestbl which controls the type of run and sittbl controls how stations are treated(e.g, sigmas of apriori coordinates)04/30/03 12.540 Lec 20 17 Files needed for processing – Broadcast ephemeris from receivers – SP3 orbit files from IGS – GAMIT g-files ) files: • Initial orbit information: Sources • Earth Orientation Parameters (EOP Orbit integration in inertial space • Satellite clock files (j-files) • Ocean tide files 04/30/03 12.540 Lec 20 18 Files continued • Moon and Sun ephemeredes • leap-second file (UTC versus AT) • Satellite information files • GPS antenna information (phase center) • Information about stations (coordinates, • Control files for GAMIT. Two major ones are called apriori coordinates). – orbit integration – solid Earth tides receiver/antenna types and heights) sestbl. which controls the type of run and sittbl. Which controls how stations are treated (e.g, sigmas of 9