Leica GS09 User Manual page 26

GS09, Using the CS09 Field Controller
Contributing satel-
lites
Displays the number of satellites that are contributing to the currently computed
position solution.
Touch screen: Tapping the icon leads to STATUS Satellites.
Icon Description
When a position status icon is displayed, the number of satellites
currently used for the position computation are shown.
If no position is currently available but satellites are being tracked
then the L1 and L2 values (GPS only) or the G and R values (GPS &
GLONASS) show how many satellites are being tracked.
The number of contributing satellites can differ from the
number of visible satellites. This may be either because
satellites cannot be viewed or the observations to these
satellites are considered to be too noisy to be used in the
position solution.
The number of contributing GLONASS satellites could be
zero if five or more GPS satellites are used for the position
computation. The processing algorithm automatically
selects the best possible set of satellite combinations for
the position computation.
A position computation with R = 0 is certainly within the
specified reliability.
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