Russian system of differentional correction and monitoring
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On-line monitoring
Structure and status of GLONASS constellation
Structure and status of GPS constellation
GLONASS availability
GPS availability
GLONASS+GPS availability
Prediction of GLONASS navigation definition precision
Prediction of GPS navigation definition precision
Prediction of GLONASS+GPS navigation definition precision
On-line monitoring GNSS GLONASS and GPS

      Errors estimations of pseudoranges measurement are generated in discrete kind (index "In"), meaning the limited value of measurement error. Table 1 describes the correspondence of index to the value of limited error of pseudorange measurement ( e ) (metrical scale).

The correspondence of index to value of limited error estimation of pseudorange measurement (e).

ln 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
e[] 2.4 3.4 4.85 6.85 9.65 12 15 20 30 50 100 200 500 1000 3000 >3000

      The value e, corresponding to index in the range from 0 to 4 inclusive, coincide with the values of URA, transfered in navigation message GPS. So after taking the integrity message and GPS navigation message, the user could equally treat the estimations of pseudorange measurement errors.

The values e, corresponding the index in the range from 5 to 15 inclusive, are chosen from considerations of convinience for the following analysis.