Main features >> Log NMEA data for evaluation >> Monitor NMEA data acquisition>> Analyze and evaluate NMEA data >> Cold start time test >>

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2 Main features >> Log NMEA data for evaluation >> Monitor NMEA data acquisition>> Analyze and evaluate NMEA data >> Cold start time test >> Positioning accuracy analysis >> Outlier analysis >> Fix - No Fix - Fix status analysis >> Report and present the evaluation results >>

3 What is GPSTest Software? An excllent tool for testing and evaluating GPS Receivers/Modules based on the NEMA 0183 standard. It helps you understand the quality, stability and accuracy of GPS receivers or modules. It helps you compare the quality and performances of different GPS receivers (models).

4 What is the Benefits of GPSTest? If you are a vendor, it helps you test and evaluate the quality of your GPS products. It helps you improve product performance. If you are a user, it helps you find out the best GPS receiver that fits your project requirements. It helps you make right decision.

5 What can I do with GPSTest? Log and monitor the NEMA data from multiple GPS receivers at the same time. Test cold start time. Conduct accuracy analysis with different probability confidence intervals. Conduct outliers or jump points analysis with different error distances. Plot the positional errors and error distributions. Export data to Excel for your further analysis. Show up roads test results on MapPoint. Generate test report in Microsoft Word.

6 What do I need to use GPSTest? A PC running Microsoft Windows 98/Me/2000/XP Multiple serial or USB COM ports Microsoft Mappoint 2002 and Office 2000 or later version 128 MB RAM and 2.0 GB hard disk space

7 Basic Flow For Testing a GPS Receiver Log NMEA data for at least two hours Evaluate and analyze the NMEA data Report and present the evaluation results

8 Main features >> Log NMEA data for evaluation >> Monitor NMEA data acquisition >> Analyze and evaluate NMEA data >> Cold start time test >> Positioning accuracy analysis >> Outlier analysis >> Fix - No Fix - Fix status analysis >> Report and present the evaluation results >>

9 Log NMEA Data for Evaluation GPSTest uses the captured NMEA data to evaluate the performance of GPS receivers. Before you can evaluate a GPS receiver, you must log the NMEA data from the GPS receiver for at least two hours at a static point. If you want to compare performances among different GPS receivers, you may need log all NMEA data from different receivers at the same time. You can use any utility program to log NMEA data. However, GPSTest allows you to log GPS data from 4 receivers at the same time.

10 Wizard for Logging GPS Data

11 Wizard for Logging GPS Data - 1

12 Wizard for Logging GPS Data - 2

13 Wizard for Logging GPS Data - 3

14 Wizard for Logging GPS Data - 4

15 Main Features >> Log NMEA data for evaluation >> Monitor NMEA data acquisition >> Analyze and evaluate NMEA data >> Cold start time test >> Positioning accuracy analysis >> Outlier analysis >> Fix - No Fix - Fix status analysis >> Report and present the evaluation results >>

16 Monitor NMEA Data Acquisition After you started to log NMEA data, you can monitor NMEA messages, navigation info, signal quality and satellites in view for one or all GPS receiver(s).

17 Monitor Data from One Receiver

18 Monitor & Compare Data Acquisition for Multiple Receivers

19 Log NMEA data for evaluation >> Monitor NMEA data acquisition >> Analyze and evaluate NMEA data >> Cold start time test >> Positioning accuracy analysis >> Outlier analysis >> Main features >> Fix - No Fix - Fix status analysis >> Report and present the evaluation results >>

20 Analyze and Evaluate NMEA Data With the logged NMEA data, you can: calculate the cold start time and the times to acquire one, two, three and five satellite fixes. conduct positioning accuracy analysis with or without excluding some big errors (Outliers). conduct outliers or jump points analysis to see what reason and what time the big jumps occurred. conduct analysis of the fix no fix - fix status changes to see the stability of the receiver. plot the error distributions to see the overall performance of the receiver.

21 Analyze and Evaluate NMEA Data

22 Main Features >> Log NMEA data for evaluation >> Monitor NMEA data acquisition >> Analyze and evaluate NMEA data >> Cold start time test >> Positioning accuracy analysis >> Outlier analysis >> Fix - No Fix - Fix status analysis >> Report and present the evaluation results >>

23 Cold Start Time Test Result

24 Main Features >> Log NMEA data for evaluation >> Monitor NMEA data acquisition >> Analyze and evaluate NMEA data >> Cold start time test >> Positioning accuracy analysis >> Outlier analysis >> Fix - No Fix - Fix status analysis >> Report and present the evaluation results >>

25 Positioning Accuracy Analysis By giving an error rejection probability or distance, you can get different accuracy estimation of the GPS receiver. You can also choose one of three estimation options for the coordinates (position) and the accuracy too.

26 Accuracy Estimation Results

27 Positioning Accuracy in Graphic View

28 Main Features >> Log NMEA data for evaluation >> Monitor NMEA data acquisition >> Analyze and evaluate NMEA data >> Cold start time test >> Positioning accuracy analysis >> Outlier analysis >> Fix - No Fix - Fix status analysis >> Report and present the evaluation results >>

29 Outlier Analysis Based on the given error rejection probability or distance, GPSTest will list all the rejected errors for your further analysis. You can easily dump history data before and after the outlier (jump) point to Excel for further analysis by giving a time period specification. This may help you find a possible reason for the jump.

30 Outlier Analysis

31 Main Features >> Log NMEA data for evaluation >> Monitor NMEA data acquisition >> Analyze and evaluate NMEA data >> Cold start time test >> Positioning accuracy analysis >> Outlier analysis >> Fix - No Fix - Fix status analysis >> Report and present the evaluation results >>

32 Fix - No Fix - Fix Status Analysis GPSTest will check and list all time points at which the fix status changed, i.e. from Fix to No Fix or reversed. You can easily dump history data before and after the fix status change point to Excel for further analysis by giving a time period specification. This may help you find a possible reason for the status change.

33 Fix - No Fix - Fix status analysis

34 Main Features >> Log NMEA data for evaluation >> Monitor NMEA data acquisition >> Analyze and evaluate NMEA data >> Cold start time test >> Positioning accuracy analysis >> Outlier analysis >> Fix - No Fix - Fix status analysis >> Report and present the evaluation results >>

35 Report Evaluation Results GPSTest uses Microsoft Office software for final reports and presentation of all test results. You can easily add comments and integrate different kinds of results into a final test report according to your requirements. You can also export NMEA data to Excel and display road test data on MapPoint for an easy view and analysis.

36 Test Report Sample

37 Positional Error Distribution in Excel Chart

38 Error Distribution in Latitude Direction

39 Error Distribution in Longitude Direction

40 Error Distribution in Altitude Direction

41 Export NMEA Data to Excel

42 Show Road Test Data on MapPoint

43 Contact Information Mobile GPS Online 387 Stoneway Drive Nepean, Ontario, Canada K2G 6G7 Tel. (613) Web: