User's Manual

Fortress ES-Series CLI Guide: Networking and Radio Configuration
86
3.7 GPS and Location Configuration
Only the ES2440 and ES210 Mesh Points are equipped with
an internal GPS receiver that, when enabled and connected to
a GPS antenna, permits the Mesh Point to use the signals of
GPS satellites in range to triangulate its exact position on the
globe. The internal GPS is
disabled by default.
The ES820 and ES520 Mesh Points can be equipped with
external GPS receivers. Fortress Mesh Point Hardware Guides
for these models provide details on supported devices. Install
external USB GPS receivers according to their manufacturers’
instructions. After installing an external GPS receiver, you must
enable it.
Enable the internal GPS or an external GPS receiver with the
set location command:
# set location -mode gps
View the current location with show location:
# show location
Mode: gps
Fix type: 3D
Latitude: 42°34'17.659"N
Longitude: 71°24'44.180"W
Altitude: 93 meters
Speed: 0.0000 m/s
Satellites: 8
Last Fix: Tue Mar 23 13:46:42 2010
The Mode indicates whether the location will be determined by
the GPS, or set manually.
The
Fix type indicates how many, if any, GPS satellites are
within the Mesh Point’s range and whether or not the Satellite
Based Augmentation System (SBAS) was used to determine
the Mesh Point’s location:
 Unavailable : No satellites are within range and no fix is
obtainable.
 2D or 2D SBAS : A limited number of satellites are within
range. A fix is obtainable, but the location is not as accurate
as when the fix type is
3D or 3D SBAS .
 3D : Indicates that enough satellites are available to get
accurate longitude, latitude, and altitude readings.
 3D SBAS : The most accurate fix type. It indicates that
enough satellites are available to get accurate longitude,
latitude, and altitude readings and that the SBAS was used
to determine the location.