User's Manual

GeoExplorer 6000 Series User Guide 69
Using the GNSS Receiver 5
7. In the Required Accuracy field, select the estimated accuracy that is required
before GPS positions are logged.
8. Tap
Done.
Note – Accuracy settings do not affect GNSS positions that are used for navigation. GNSS
positions are still calculated by the GNSS receiver and are available for navigation.
Connecting to a real-time differential correction source
Use a real-time differential GNSS (DGNSS) source to give you better accuracy as you
collect data. For more information about how real-time differential GNSS works, see
Differential GNSS explained, page 75.
Using real-time corrections from an Internet source
DGNSS corrections are often broadcast over the Internet. For example, corrections
generated by a VRS network are commonly broadcast over an Internet server. A VRS
network uses data from several base stations to provide rover receivers with
corrections that are generally more accurate than corrections from a single base
station. Alternatively, you can connect to a server that provides DGNSS corrections
from a single base station.
For information on how to connect to the Internet and receive real-time corrections
from an Internet server, see Connecting to a Bluetooth-enabled device, page 87 or
Connecting to a Bluetooth-enabled phone for Internet access or real-time corrections
(including VRS networks), page 94.
Using SBAS corrections
The GeoExplorer 6000 series handheld has an integrated receiver that uses Satellite
Based Augmentation Systems (SBAS) correction messages to improve the accuracy
and integrity of GNSS data.
The default SBAS tracking mode is Auto. In Auto mode, the receiver tracks or locks
onto the most powerful satellite signal. The GNSS receiver can track two SBAS
satellites at the same time in Auto or Custom mode. It uses corrections from only one
SBAS satellite at a time, but tracking two satellites can improve the availability of SBAS
real-time corrections. For example, if you are working in environments where obstacles
may block the direct line of sight to the SBAS satellite, there is less chance of signal loss
if you are tracking more than one SBAS satellite.
Note – To turn off multiple SBAS satellite tracking, select Custom mode and then deselect
all other SBAS satellites except for the satellite you want to track.
The receiver tracks SBAS satellites according to your geographical location:
• Wide Area Augmentation System (WAAS) satellites are tracked in the
Continental United States including Alaska, and parts of Canada and Mexico.
• European Geostationary Navigation Overlay Service (EGNOS) satellites are
tracked in Europe.