Cold start time test >> Positioning accuracy analysis >>

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 >>

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).

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.

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.

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

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

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 >>


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, GPSTestallows you to log GPS data from 4 receivers at the same time.

Wizard for Logging GPS Data

Wizard for Logging GPS Data - 1


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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).

Monitor Data from One Receiver

Monitor & Compare Data Acquisition for Multiple Receivers


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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.

Analyze and Evaluate NMEA Data


Main Features >>


Cold Start Time Test Result


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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.

Accuracy Estimation Results

Positioning Accuracy in Graphic View


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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.

Outlier Analysis


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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.

Fix - No Fix - Fix status analysis


Main Features >>


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.

Test Report Sample

Positional Error Distribution in Excel Chart

Error Distribution in Latitude Direction

Error Distribution in Longitude Direction

Error Distribution in Altitude Direction

Export NMEA Data to Excel

Show Road Test Data on MapPoint

Contact Information

Mobile GPS Online387 Stoneway DriveNepean, Ontario, CanadaK2G 6G7Tel. (613) 823-0926Email: [email protected]: www.mobilegpsonline.com

mailto:[email protected]

Cold start time test >> Positioning accuracy analysis >>

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