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"Freeware - GPS Diag. Software"
GPS Diag Software
 
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  GPS Diag Software See below...
       
       
       
       

Version 1.05 released 2nd December 2002

Introduction
GPSDiag is a free GPS program for 32-bit Microsoft Windows platforms (Windows 95, 98, ME, NT & 2000) to monitor incoming NMEA GPS messages from a serial port. It displays the interpreted data in the top half of the window with raw data in the bottom half. Simply click on the COM1-4 buttons to start logging and press stop to terminate.

The following information is displayed on the main display:


UTC Time
Longitude
Latitude
Speed
Altitude
Course
Quality (Valid, Invalid)
Magnetic variation
Fix mode (2D, 3D)
UTC Date
Satellites used
PDOP, HDOP & VDOP (dilution of precision)

And for each satellite in view (but not necessarily being used) the following information is provided:


PRN
Elevation
Azimuth
SNR (signal to noise ratio)
Satellite used in fix

Click here to download a ZIP file containing Setup.EXE (4.2MB)

You may also like to check the GPS Glossary for further information on some of the terms used. Details on the contents of the Common NMEA GPS Sentences is also available, the meaning of which will probably become clearer after you've starting using the software.

Several people have asked if we can make source code available for this program, unfortunately for various commercial reasons we will not distribute the source code for this application. The software is written using Borland Delphi 5 and incorporates several proprietary software libraries, we recommend searching on the Internet for freeware / shareware GPS and communications libraries if you are interested in writing a similar application yourself.

Freeware GPS Diagnostic Program

Changes for V1.05
Added option to display timestamp's as PC local time.
Added pause/resume button when replaying data.
Added monitoring of 1PPS line when connected to DSR line.
Added option to send command on positive edge of 1PPS line.
Fixed problem that could cause 'unable to open com port' to keep repeating.
Added Tools | Send command option to allow commands to be sent to GPS receiver.
Allow baud rate to be specified under Tools | General options.
Added field formats menu item to allow NMEA data to be displayed in different formats.
Changes for V1.04
Distribute as single EXE installation created with Install Shield.
Changes for V1.03
Added support for $PGRME sentences sent by some receivers with estimated position error information.
Changes for V1.02
Display 2-D fix with yellow background, invalid fix with red background.
Misc fixes to work with wider range of NMEA GPS receivers.
Added support for GPS connected to COM1-COM8.
Changes for V1.01
Supports logging of data and replaying of data from a file.
Problem fixed interpreting NMEA data for locales where the default decimal separator is not a full stop.
Command-line like 'GPSDiag L2 c:\temp\GPS_%DATE_%TIME.txt' can be used to automatically log COM2 data to a file.
Command-line like 'GPSDiag R c:\temp\GPS_20010907_141002.txt' can be used to automatically replay data from file.


 

 

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