DRAFT 3 – JANUARY 10, 2005 NOT FOR RELEASE
ORBITGPS USER GUIDE
SERIAL GPS RECEIVERS
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OrbitGPS’s GPS receivers offer typical accuracies of 3-5 meters uncorrected, and 3
meters or better with Wide Area Augmentation System (WAAS) correction.
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They are
tested to comply with FCC and CE standards.
Note: Screens and windows pictured in this User Guide are samples and may vary.
Getting Started
Using the Serial GPS receiver with an existing GPS application
The Serial GPS receiver is designed to work “out-of-the-box” with GPS applications that
accept data in the NMEA protocol format.
The National Marine Electronics Association regulates the NMEA 0183 specifications
standard which defines a set of ASCII strings, called sentences, which relay GPS
navigation information. This is the most commonly used standard for GPS
communications.
To configure the Serial GPS receiver for use with a GPS application that supports the
NMEA protocol, set the following parameters in the GPS application:
GPS Com Port or Com Port: COM1
Baud Rate: 4800
Protocol: NMEA (Depending on the GPS application, you may not be asked to enter
the protocol.)
Once these parameters have been set, the GPS application should begin automatically
receiving GPS data from the Serial GPS receiver. Please consult the GPS application
documentation for further information on how to communicate with an attached GPS
receiver.
Using the Serial GPS receiver with WAAS and EGNOS
The OrbitGPS Serial GPS Receiver is configured to receive GPS correction data from the
Wide Area Augmentation System (WAAS) and European Geostationary Navigation
Overlay Service (EGNOS) differential correction systems. Simply put, WAAS and EGNOS
broadcast additional correction data that is used to improve quality of the GPS data
provided by GPS receivers. The OrbitGPS Serial GPS Receiver will automatically acquire
and utilize the correction data of WAAS or EGNOS satellites available in the area of use.
For more information on WAAS visit:
http://gps.faa.gov/programs/waas/currentnews-text.htm
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*Accuracy is subject to degradation based on environmental and positional conditions. Rated accuracy provides 95%
Circle Error Probability (CEP) position accuracies of <5 meters with WAAS correction and <10 meters uncorrected.