Trimble GPSurvey V2.35 - How to process GPS data (outline) (historical)
GPSurvey V2.35 - How to process GPS data (outline)
PROJECT: Create New or Open existing project
LOAD data From DAT File: - CONFIG "interactive" or "quick edit/batch prompt"
PROCESS Baselines – ADD files to process
In WAVE processor:
– Station Position (check base station "fixed control" coordinates)
– Occupations (check antenna heights)
– Setup (only to alter processing controls)
– Baselines to start data processing
– Save results if satisfactory and Exit WAVE
VIEW Network Map
Project Report to generate list of station coordinates and other output
Coord Transformations to output continuous kinematic coordinates or transform coordinates
Outputting Continuous Kinematic Data Points From GPSurvey
UTILITIES – select COORD TRANSFORMATIONS
Set ASCII formats –
To: Geographic (or other)
Set Coordinate Systems –
From: Geographic WGS84
To: Geographic WGS84 (or other)
Enter SSK File Coordinates: FILE-FROM-SSK FILE
Select files to output from selection (identify SSK files from network map)
Output to ASCII file: FILE-TO-ASCII FILE
Name the file and access it through a text editor
Using Precise Orbits in GPSurvey
Precise orbits are required to reduce orbit error when processing baselines over 100km and centimeter level errors are significant.
Connect to an online data center (such as http://sopac.ucsd.edu/cgi-bin/dbDataByDate.cgi) to access precise orbits.
(For SOPAC) select "products" and "data".
The orbit files are in the form: igsWWWWD.sp3. WWWW is the GPS week, D is the day of week.
In DOS, convert the files to EF18 format: "sp3ef18 *.sp *.e18"
Put the e18 files in the directory /gpsurvey/precise.
In Wave, select Process-Setup-Advanced Controls-Ephemeris-Precise before processing the data.