The C/A Code (Coarse/Acquisition Code) in inertial navigation is a key component of GPS signals, primarily used in the L1 frequency band (1575.42 MHz). It is a pseudo-random noise (PRN) code that enables GPS receivers to determine distance (pseudorange) to satellites, facilitating position, velocity, and timing calculations.
While inertial navigation systems (INS) operate independently of external signals, they are often integrated with GNSS (Global Navigation Satellite System) receivers that rely on the C/A code for initial positioning and corrections. This integration enhances accuracy, especially when GNSS signals are available, and helps compensate for INS drift over time.
