Network monitoring

A network monitoring java applet is available here. It shows the current status of the ODTS engine (network side), updated in real-time.  The figure (available in 2D or 3D), represents the current network of stations as well as the current constellation. A station/satellite in red is considered as not active. One can choose to draw raw measurements, as well as widelane-fixed or narrow-lane fixed measurements, for a selected set of stations and/or satellites.

Methods comparison

The two figures below reflect the actual horizontal errors of our PPP software, in real time, using the standard  method (left figure, real-valued ambiguities), and the ambiguity resolution method (right figure, integer-valued ambiguities), for the FFMJ station:

Horizontal positioning errors (last 6 hours)
Standard PPP method

Horizontal positioning errors (last 6 hours)
PPP method with zero-difference ambiguity resolution

PPP monitoring

Several monitoring cases are presented here. They reflect the actual results of our PPP software, in real time, using the complete set of corrections provided by CNES. These corrections correspond to the standard clocks, with additional biases needed for user integer ambiguity resolution. 

The following figures represent the real-time positioning errors (sliding window over one day), for a selected set of stations globally distributed: