Protocol [upd] | Icd-gps-153

| Feature | ICD-GPS-153 (P(Y) Code) | M-Code (ICD-GPS-240) | | :--- | :--- | :--- | | | Encryption (W-code) | Cryptography + Spreading code separation | | Power | Same as civil (+3 dB) | +20 dB (spot beam) | | Jamming resistance | Moderate | Very High (designed for contested environments) | | Signal structure | Legacy BPSK | BOC (Binary Offset Carrier) | | Backward compatibility | N/A | New receivers required |

However, the syntax suggests you are looking for the used by GPS receivers. The closest valid protocols are ICD-GPS-200 (the current standard) and ICD-GPS-150 (the legacy standard). icd-gps-153 protocol

: Developers or researchers requiring the document must often complete a GPS Technical Library Document Request form and have it signed by a GPS Program representative. Legacy Status | Feature | ICD-GPS-153 (P(Y) Code) | M-Code