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6. The estimated positions have steadily
expressed about a few meters or up to a
few hundred meters off the reference
position.
Make sure the estimated position and
reference position are expressed in the
same coordinate frame. The default datum
of the module is WGS 84.
7. The estimated position has a few
kilometer away from the reference
position.
The module may execute almanac
navigation.
8. The module doesn’t perform well in
TTFFs of warm-start and hot-start.
A back-up battery is needed to support the
running of RTC and Battery backed-up
RAM (BBR). The update position,
ephemeris, and almanac can be retrieved
from BBR or flash memory.
9. The module doesn’t perform the last
configuration settings.
Save the configuration settings to BBR,
which needs a backed-up battery
supported, or flash memory.
Table 8.1 Troubleshooting.
