Operator's Manual

Page 20
Version 1.4
Copyright © 2019 RSAE Labs
08-Apr -2019
6. Locating Position
The GS-6C employs a number of methods to determine its geographic location. These are discussed
in the proceeding sections
6.1. GPS/GNSS Receiver
The GS-6C contains a high accuracy state-of-the-art, multi-constellation concurrent Global Navigation
Satellite System (GNSS) receiver. The receiver is capable of acquiring satellite signals from the United
States GPS constellation, the Russian GLONASS constellation and in the near future the European
Galileo constellation. With unobstructed view of the sky, the GNSS receiver can generally obtain a
location within 30 seconds. The GS-6C allows up to 90 seconds of acquisition to allow the unit to
obtain a more accurate fix.
If the receiver is not able to obtain a suitable position fix within the allotted time, it will discontinue
operation in order to preserve battery power.
6.2. Cell Tower Location Services
If the GS-6C is unable to obtain a suitable position via the GPS/GNSS receiver, it will, as part of the
cellular communications cycle, obtain a list of neighboring cell towers. The GS-6C will transmit the cell
tower list to the DMC. The DMC, using a third-party location API, will then obtain the approximate
location of the device based upon the list of cell tower. Cell tower derived location, while not as
accurate as GPS/GNSS, can provide a useful location and provide an awareness as to the location of
the container that is being tracked.
6.3. mist
®
Beacons
The GS-6C can also determine its location by the use of mist
®
beacons. These fixed mount devices are
programmed to “beacon” out their location and are used mainly in indoor locations which are GPS/GNSS
denied. Since cell tower derived locations can be somewhat inaccurate, mist
®
beacons can be used to
greatly improved the location accuracy. By deploying multiple beacons within a warehouse, the location
within the warehouse can be determined.