User manual TRIMBLE GEOEXPLORER 6000

[. . . ] User GUide GeoExplorer® 6000 series USER GUIDE GeoExplorer® 6000 series Version 1. 00 Revision A February 2011 F Trimble Navigation Limited 10355 Westmoor Drive Suite #100 Westminster, CO 80021 USA www. trimble. com Legal Notices Copyright and Trademarks © 2011, Trimble Navigation Limited. Trimble, the Globe & Triangle logo, GeoExplorer, and GPS Pathfinder are trademarks of Trimble Navigation Limited, registered in the United States and in other countries. EVEREST, GeoBeacon, GeoXH, GeoXT, GPS Analyst, GPScorrect, H-Star, Floodlight, Tempest, TerraSync, Tornado, and VRS are trademarks of Trimble Navigation Limited. Microsoft, ActiveSync, Excel, OneNote, Outlook, PowerPoint, Windows, Windows Live, Windows Media, Windows Mobile, Windows Vista, and the Windows Start logo are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. [. . . ] In the example shown here, eight satellites are being tracked and seven of these satellites are being used to compute GNSS positions. Note ­ Numbers with no box represent satellites that are available, but that the TerraSync software is not receiving signals from. Satellites that have an "R" prefix are GLONASS satellites. GLONASS satellites appear only if the receiver has the Trimble Floodlight satellite shadow reduction technology option activated. For more information, see Activating the Floodlight technology and the NMEA output options. Your current GNSS position is displayed at the bottom of the screen. B Tip ­ For detailed information on satellite positions and signal strengths, use the Satellite information screen in the Status section. Resetting the GNSS receiver Trimble GNSS field applications all have options to reset the receiver to: · · · · delete the almanac delete information stored on the last known position restart the receiver reset the GNSS receiver to factory default settings GeoExplorer 6000 Series User Guide 65 5 Using the GNSS Receiver Improving GNSS productivity using Floodlight satellite shadow reduction technology The productivity of high-accuracy GNSS receivers can be affected by satellite shadow. Satellite shadow occurs when the line of sight between a GNSS receiver and GNSS satellites is partially or fully blocked by obstructions such as buildings, trees, or even the landscape itself. The effect of satellite shadow is a reduction in the number of satellites that the receiver can track. In general, the quality of your data decreases when the number of satellites which is used to calculate the position is low, and in many cases when large portions of the sky are obstructed, it is impossible to generate any positions at all. The Floodlight satellite shadow reduction technology option for the GeoExplorer 6000 series reduces the effects of satellite shadow to help deliver more positions and better accuracy in conditions affected by satellite shadow. The Floodlight technology option improves GNSS productivity using three key technologies: · it enables GLONASS satellite tracking, which greatly increases the number of satellites that the GNSS receiver can track. Tracking more satellites can help to improve satellite geometry and thereby improve accuracy. it utilizes barometric measurements to assist the GNSS receiver. The barometer measurements can assist by improving both the vertical and horizontal accuracy of positions, particularly in conditions where the satellite count is very low, for example under tree canopy. it improves the ability of the receiver to track weaker satellite signals which are common when working in the shadows of trees and buildings. · · To achieve optimum Floodlight technology performance, it is important that the barometer is kept free of obstructions. Make Barometer sure that the Barometer seal located on the underside of the device is kept clear and is not covered by your fingers or any other covering. Note ­ If you are using Trimble field software, for example, the TerraSync software, make sure that you have selected the correct option for postprocessing data--if your base station(s) provide corrections for GPS and GLONASS satellites, select GPS + GLONASS. This affects the accuracy of the Predicted Postprocessed Accuracy (PPA). See Accuracy settings and using accuracy-based logging, page 68. To purchase the Floodlight technology option, contact your Trimble reseller. After purchase, you must activate the Floodlight technology option on the receiver. See Activating the Floodlight technology and the NMEA output options, page 74. 66 GeoExplorer 6000 Series User Guide Using the GNSS Receiver 5 Ensuring the accuracy of your GNSS data GeoExplorer 6000 series handhelds are high performance GNSS receivers that calculate very accurate GNSS positions. [. . . ] See Activating the Floodlight technology and the NMEA output options, page 74. Ensure the integrated GNSS receiver gets a clear view of the sky as possible. Keep your body mass as far from the receiver as practical and do not crowd over the handheld. Use an external antenna if needed to elevate the position of the antenna. [. . . ]