MapSight User Manual
Page 72
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GPS Info
This
GPS Info
utility allows you to see information in regards to which GPS satellites are
accessible to your MapSight.
This information is available from the three options on the View menu.
•
Skyplot
•
Satellite Information (Sat info)
•
Navigation Info (Nav info)
Skyplot
This is the default screen in GPSInfo. (If you have moved away
from it, you can return by selecting
View > Skyplot
.) It shows a map
of all the satellites that your MapSight is aware of, with
identification numbers. Solid circles mean that MapSight has an
active connection with the satellite.
This screen also gives information on the physical location of your
MapSight, based on data it receives from the GPS satellites.
The top of the screen is always North
Latitude
and
Longitude
are the users geospatial coordinates.
Altitude
is the height above sea level in meters.
PDOP
is a measure of the positional accuracy of the GPS
reading.
Nav Mode
is the navigational status of GPS Fix. A 2-D (two
dimensional) fix only includes latitude and longitude data. A 3-D
(three dimensional) fix also includes altitude data. The available
constellation of satellites available affects whether altitude can
be calculated.
Sat Info
This screen gives a table of all visible satellites, along with numeric
data about their location and accessibility. To access this screen,
select
View > SatInfo
.
Fix
is a column showing which satellites are being used to
calculate the GPS position.
SV
provides the Space Vehicle (or GPS satellite) identification
number.
El
gives the elevation of the satellite in degrees.
Az
gives the azimuth of the satellite, with true north defined as
0° and true south defined as 180°.
SNR
gives the Signal-to-Noise Ratio of communication with the
satellite. A value between 40 and 50 is considered good.
