Product Manual

Using the GNSS receiver
Receiving signals from GNSSsatellites
Supported software
Using an external GNSS antenna
Using an external GNSS receiver
The MobileMapper 50 handheld contain an integrated uBlox Neo-M8T GNSS receiver,
which is set to ensure the best possible performance in the field for data collection and full
compatibility with Spectra Precision field and office software.
The receiver supports GPS, GPS plus GLONASS, or GPS plus Beidou, with 1 to 2 meter
positioning accuracy in real time (using SBAS) in open sky.
Receiving signals from GNSSsatellites
To receive signals from GNSS satellites, the handheld must have a clear view of the sky.
GNSS positions may not always be available, particularly in or near buildings, in vehicles, or
under tree canopy.
The handheld has a tuned GNSS antenna located inside and at the top left of the device,
near the speaker. For optimal GNSS reception, hold the handheld at 15° from horizontal
allowing it visibility of the sky. When collecting point data with a MobileMapper 50
handheld, it is recommended that you remain stationary at the point for at least 10
seconds before beginning to log GNSS positions. This allows the GNSS receiver’s internal
algorithms to stabilize, and ensures the best possible point feature accuracy.
The GNSSreceiver supports all three available SBAS correction services (WAAS in North
America, EGNOS in Europe, and MSAS in Japan).
Using GNSS enables the handheld to determine your location within 1 to 2 meter accuracy
in open sky (with SBAS), and enables geo-tagging of photos you take using the handheld's
integrated camera (see Using the camera, page 52 for more information on enabling
geotagging and taking photos).
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