Spectra Precision Survey Pro v5.1 - Manual (Page 27)

21
Checking the GNSS Status
Checking the GNSS status is an important step before starting a job.This
implies that the receiver is in real conditions of use, preferably in an open sky
environment.
Use the GNSS Status function on the Survey menu to read this information. The
GNSS status is divided into three or five different screens depending on
whether you are using the GNSS receiver in RTK or Post Processing mode:
•
Position: Provides the three coordinates of the position solution currently
computed by the GNSS receiver, the solution status, as well as heading and
speed if the receiver is currently moving. The position may be expressed in
WGS84 (always possible), in a local coordinate system (if selected and
solved) or as grid coordinates (if the grid is selected and solved).
• Sat Info: Shows the L1 signal strength (SNR) of each satellite in tabular and
graphic form. Depending on the receiver used, you may be given the ability
to reject some satellites you don’t want to use (because the signals received
from them are too weak for example, or because they are officially declared
unhealthy).
• Sky View: Provides a polar view of the sky showing the location and type of
each satellite being tracked (Lock) and the total number being used in
position solutions (see example). You may change the value of the elevation
mask on this screen. This will update the value read on the
General tab as
well (see Additional Settings on page 20).
• Post Process: This tab is useful to help you conduct a Post Process survey.
The rest of the time, the tab is empty.
• Data Link (RTK only): Describes how a rover is provided with corrections, or
the type of corrections generated by a base. For more information, see 6.
GNSS Surveying on page 34.
• Receiver (RTK only): Provides additional information describing the position
solution computed by the receiver. The
Reset Ambiguities button allows you
to re-initialize the computation of the position. For more information, see
6. GNSS Surveying on page 34.
Before going any further in your work, you should check that at least 6
satellites are received and used, each satellite providing a good signal level,
and the receiver delivers a 3D position solution.