Gps Status Page - satmap active10 Full User Manual

4.05 GPS STATUS

4.05 GPS STATUS Page

(GPS Map → MAIN MENU → COMPASS →
TRIP LOG → GPS STATUS)
After first use (when the language is
selected), this is the screen that is first
displayed when switching on the unit (unless
there is already a map card inserted in which
case the unit will briefly show the
page, see section 3.01).
The elliptical diagram represents the sky
above you where North is up. Satellites visible
to the unit are allocated numbers and also
shown on the bar chart. Yellow bars indicate
the unit can see a satellite. The bars change
to orange when the unit has acquired a lock.
There are also indications of Signal to Noise
Ratio (Av SNR and Max SNR).
GPS STATUS
On acquiring lock, the
to the GPS Map screen. For best results in
achieving satellite lock the unit should be
showing the GPS STATUS page.
Before acquiring a lock, details of your last
known position, with time and date, are shown
at the top of the page. Once you have a lock,
your coordinates and elevation are shown.
To access the GPS STATUS page from the
GPS Map screen, keep pressing the
button (front right button) until you reach the
GPS STATUS
page.
© Satmap Systems Ltd
The upper section of the
shows details of your last known location,
including time, date and grid reference. (Grid
reference format options are given in
Settings, section 5.07, 'Position Display
Format').
As a guide, a minimum of four satellites are
Map Packs
needed to acquire lock and the Signal to
Noise Ratio (SNR) figure should be 30+.
The signal indicator (either red cross or green
signal icon) indicates the strength of signal
received by the unit. The GPS indicator
caption at the bottom of the screen either
says 'Acquiring GPS' or gives accuracy to
within a certain distance.
If the unit is receiving a poor signal eg. under
wet tree canopy, it may only be able to give
will go
two dimensional data (losing elevation data).
Under these circumstances the elevation
caption at the top right of the screen will show
'2D' instead of an elevation figure. The signal
received icon at the top left will also show a
single green crescent plus '2D'.
Buttons:
Lock to GPS
Return to last map screen
Page
Page
Return to last map screen
GPS STATUS page
Signal
indicator
GPS
Average
Signal
to Noise
Ratio
(SNR)
Lock to
15
Figure 4.04
GPS
Satellitesʼ
atomic
clock time
Maximum
Signal to
Noise Ratio
Page