User manual TRIMBLE GPS PATHFINDER PROXRT 2.00 REV A

[. . . ] USER GUIDE GPS Pathfinder® ProXRT receiver USER GUIDE GPS Pathfinder® ProXRT receiver Version 2. 00 Revision A July 2010 F Trimble Navigation Limited 10355 Westmoor Drive Suite #100 Westminster, CO 80021 USA www. trimble. com Legal Notices © 2010, Trimble Navigation Limited. Trimble, the Globe & Triangle logo, GPS Pathfinder, and Nomad are trademarks of Trimble Navigation Limited, registered in the United States Patent and Trademark Office and in other countries. GeoBeacon, GPScorrect, H-Star, TerraSync, Tornado, and VRS are trademarks of Trimble Navigation Limited. Microsoft, Windows, Windows Mobile, Windows NT, Windows Vista, and Internet Explorer are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. [. . . ] If you are using TerraSync software to collect data, use accuracy-based logging. Configure the GNSS settings for the receiver to increase the precision of your data, and to minimize the effect of atmospheric interference and poor satellite geometry. Make sure that the data collection software is configured to log H-Star data, by default. Plan GNSS data collection around the times of the day when satellite geometry is best. For more information, see page 59. 2. 5. Connecting to an integrated real-time differential correction source Use a real-time differential correction source to give you better accuracy as you collect data. For more information on: · collecting data using H-Star technology, see Collecting real-time H-Star data, page 96 how real-time differential correction works, see Differential correction explained, page 96. · The GPS Pathfinder ProXRT receiver has an integrated OmniSTAR receiver and an integrated SBAS receiver for easy connection to an OmniSTAR differential correction service (see below) or an SBAS system (see page 56). Note ­ To connect to an external real-time differential correction source, such as a VRS network or GeoBeacon receiver, or to configure the GNSS field software to use corrections from an external real-time differential correction source, see Connecting to an external differential correction source, page 37. Using OmniSTAR real-time corrections The GPS Pathfinder ProXRT receiver can use OmniSTAR differential correction messages to improve the accuracy and integrity of GNSS data. OmniSTAR differential correction messages provide valid corrections over a large area. GPS Pathfinder ProXRT Receiver User Guide 53 4 Configuring the GNSS receiver To receive and decode these messages, you must subscribe to an OmniSTAR differential correction service. Currently, the levels of service offered are: · · · · HP (High Performance) achieves better than 10 centimeters XP achieves better than 20 centimeters VBS (Virtual Base Station) achieves sub-meter positioning G2, an optional service to HP and XP, that provides GLONASS corrections. Note ­ To achieve these levels of accuracy, the receiver must be operating within the coverage footprint of the service. Note ­ Currently HP and G2 are supported on the ProXRT receiver. For phone numbers and information on obtaining a subscription, subscription rates, and service coverage maps, go to www. omnistar. com. Once you have a subscription, you must activate the service through an over-the-air signal. Activating the OmniSTAR differential service 1. 2. Connect the receiver to the field computer that is running the GNSS field software. For more information, see Connecting to a field computer, page 31. Call OmniSTAR and give them: ­ ­ your location ( for example, Sunnyvale, California, USA) the model number and serial number of your GPS Pathfinder ProXRT receiver (look at the label on the bottom of the receiver) your payment option the subscription method. The methods are over-the-air or by manual entry. Request the over-the-air method. ­ ­ Note ­ The receiver must be in an open-air environment and in sight of the appropriate OmniSTAR satellite to be granted access to the OmniSTAR system. OmniSTAR gives you the OmniSTAR satellite and frequency information for your local area. The service technician advises you of the approximate time when the subscription will be transmitted. The first time a receiver is put into service or after a long period of storage, it may take up to 30 minutes for the receiver to accumulate all the required information from the OmniSTAR and GPS or GLONASS satellites. [. . . ] Carrier phase corrections are available on Version 2, or on the newer Version 3 RTCM protocol, which is available on certain Trimble dual-frequency receivers. The Version 3 RTCM protocol is more compact. 1 22 GPS Pathfinder ProXRT Receiver User Guide Glossary SBAS Satellite-Based Augmentation System. SBAS is based on differential GNSS, but applies to wide area (WAAS/EGNOS and MSAS) networks of reference stations. Corrections and additional information are broadcast via geostationary satellites. [. . . ]