Note: This article relates to units using Septentrio receivers only.
The L1 signal carries both C/A and P[Y] codes. The P[Y] signal is a military code and not available for civilian users.
Septentrio GNSS receivers will only output C/A code and carrier phase information of the L1 signal and not the L1 P[Y] code. The L1 section of the Rinex logging configuration refers to the P[Y] military code and is therefore greyed out.