NavCom SF-3050 Rev.B - Manual (Page 196)

SF-3050 User Guide – Rev B
Precise code see P-code.
PRN (Uppercase) typically indicates a GPS satellite
number sequence from 1 – 32.
prn (Lower Case) see Pseudorandom Noise.
Protected code see P-code.
Proprietary commands those messages sent to and
received from GPS equipment produced by NavCom
Technology, Inc. own copyrighted binary language.
pseudo-random noise (prn) a sequence of data that
appears to be randomly distributed but can be exactly
reproduced. Each GPS satellite transmits a unique
PRN in its signals. GPS receivers use PRNs to
identify and lock onto satellites and to compute their
pseudoranges.
Pseudorange the apparent distance from the
reference station’s antenna to a satellite, calculated
by multiplying the time the signal takes to reach the
antenna by the speed of light (radio waves travel at
the speed of light). The actual distance, or range, is
not exactly the same because various factors cause
errors in the measurement.
PVT GNSS information depicting Position, Velocity,
Time in the NCT proprietary message format.
Quick Start (StarFire) a startup mode that allows
instant <decimeter accuracy with received StarFire
signals, allowing the convergence period to be
waived. The Quick Start (user input) position should
have an accuracy of better <decimeter to achieve
maximum results. Any error in the user input position
will bias the StarFire position error accordingly, until
convergence can correct the bias. In this scenario,
convergence may take longer than the typical startup
convergence period.
QZSS Quasi Zenith Satellite System.
Glossary-194