Sparkfun Electronics SparkPNT GNSSDO Quick Start Manual page 15

• High-precision GNSS only works with multiple-frequency
antennas. This means that GPS antenna you got in the
early 2000s with your TomTom is not going to work.
Please use the SparkFun L1/L2/L5 antenna provided in
the GNSSDO kit.
• High-precision GNSS works best with a clear view of the
sky; it does not work indoors or near a window. GNSS
performance is generally not affected by clouds or
storms. Trees and buildings can degrade performance
but usually only in very thick canopies or very near tall
building walls. GNSS reception is very possible in dense
urban centers with skyscrapers but high-precision RTK
may be impossible.
• The location reported by the GNSS device is the location
of the antenna element itself. Latitude and Longitude
are fairly easy to obtain but if you're capturing Altitude
be sure to do additional reading on ARPs (Antenna
Reference Points) and how to account for the antenna
height above ground in your data collection software.
• The mosaic-T reserves
the IP (Internet Protocol)
subnet address 3 for its
USB-C interface; this
cannot be changed. If
your Ethernet network
is also using subnet
3 (192.168.3.nnn), the
mosaic-T may appear to
have a valid IP address but
communication will fail.
Please change your Router
configuration to use a
different subnet.
9
Common Gotchas