User manual

U-See User Manual - View Menu: Real time information windows
This window shows information about the current status of the Relative GPS solution. It will
show the baseline distance and the azimuth and elevation of the baseline. Said azimuth
and elevation is measured from geographic north and oriented in the Base-Rover direction.
Below this, there is indication about the quality of the solution by mean of indication of
sigma(σ) value. This value shows the threshold in which a 60% of the measurements given
by the system will be inside that threshold. Fully operational system should give sigmas in
the range of the thousandth of degree.
MasterPOS shows the current GPS solution for the moving base position.
Status shows the kind of solution that is being computed and Operative shoes with a true
or false indication if the system is usable for landing operation in a moving base.
Possible status for the solution are:
• None: System could not establish relative positioning.
• PSRDIFF: Solution comes from a differential correction of pseudo-ranges. Relative
positioning obtained using this method is considered not valid for accuracy landings
on moving bases, but could work for stationary approaches.
• L1_FLOAT: Floating L1 ambiguity solution. Typical sigma of this mode will be around
1°.
• L1_INT: Integer L1 ambiguity solution. Typical sigma of this mode is around 0.1°
• NARROW_INTEGER: Carrier phase wave-number is calculated using the maximum
information possible. This is the desired state of functioning and typical sigma can
be as low as 0.001°
Notice possible state are ordered from less to more accurate.
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Figure 16: Relative GPS typical appearance