You should plan to do your GPS data collection when the PDOP is equal or less than 4 if possible. A graph of PDOP over time will be displayed. Click “Graphs” on the Tool Bar, and scroll down to PDOP.Choose “Options” on the Tool Bar and scroll to “Elevation Mask”, enter 10 degrees.Choose “City” and select Battle Creek, MI.Choose the date of interest, and click OK. If the “Select Project” window appears, deselect “Display this dialog at start-up”.
The Planning Software should be installed on the two computer’s in the Robertson Lab that have Trimble’s GPS Pathfinder Office software, however, if it is not installed then do the following.Mission planning is critical when collecting GPS data in forested areas or other challenging sites (see “Collecting Data in Trees or near Obstructions” in the Appendix). GPS mission planning allows you to determine what time of day the satellites are in suboptimum position so that you can avoid collecting GPS data during these times. Omnistar service will not be purchased for LTER GPS II unless another user requests to borrow the unit and pays for the Omnistar service. The Omnistar service will be maintained on “ LTER GPS I”, if funding allows. Omnistar is a GPS service that gives real-time differential correction.– Used to connect your PC to the Trimble Data Logger in order to transfer data. Trimble GPS Pathfinder Office (Version 2.9)- Used to manage and process GPS data on the PC.
TerraSync – Used for collecting and updating GPS data on the Trimble data logger.Start, Settings, Control Panel, Power Off tab, “On Batteries suspend after: 10 minutes” Software The data logger is set to power off after 10 minutes of inactivity to conserve the batteries. The logger is designed to withstand accidental immersion so it should be fine to use it in the rain. The GPS can be used in temperatures from -4 F to 140 F. Two components make up each GPS unit: the Trimble Data logger type TSCe with touch screen, and the Trimble Receiver Type Pro XRS model 33302-51. “ GPS II” can be loaned to others with permission by the LTER Project Manager. “ GPS I” is to be used exclusively by the KBS LTER staff. The KBS LTER has two identical Trimble GPS units.
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