1Pps; Lle For Faster Ttff; Sge; Pvt Logger Function - Sierra Wireless AirPrime XS1110 Product Technical Specification

Function Description

1PPS

The XS1110 generates a one pulse-per-second signal (1PPS) after 3D fixed. It is
an electrical signal which precisely indicates the start of a second within an
accuracy of 25 ns. The PPS signal is provided through a designated output pin for
additional applications.
LLE for Fast TTFF
The LLE provides pre-download proprietary ephemeris data to speed up TTFF.
This feature is useful when a satellite signal is weak or when there is no signal; it
allows for the module to get position information quickly. LLE can be downloaded
from an FTP server via the Internet. LLE injection type can support GPS,
GLONASS, Galileo, BeiDou and QZSS.

SGE

The SGE is for quick positioning by itself when information received from the
satellites is sufficient. When SGE is enabled, the XS1110 will automatically
calculate and then predict single ephemeris up to three days. The predicted
information will be saved into the memory and the XS1110 will then use the saved
information for later positioning. The valid duration of SGE data is three days.

PVT Logger Function

The PVT logger function is enabled in the XS1110 module, and allows for the
module to become a logger-capable (built-in internal flash) device and record
GNSS data such as UTC, latitude, and longitude; it helps with record logging for
debugging.
The external flash of the module has 4.8 KB for this function and uses the smart
overlapping mechanism to keep the latest logger data.

Normal Mode

In Normal mode, the XS1110 module keeps on operating normally and updates
the latest navigation message anytime to get an accurate positional information.
Figure 1-2: Power Consumption in Normal Mode
Rev 4.0 Jul.20 9 41113354