Before revision: Implementation will provide C/A code to ensure backward compatibility Assured of 1.5 dB increase in minimum C/A code power to mitigate any noise floor increase Data-less signal component pilot carrier improves tracking compared with L1 C/A Enables greater civil interoperability with Galileo L1 The current status of the L1C signal as of June 10, 2021 is: Developmental signal with message set "unhealthy" and no navigation data Broadcasting from 4 GPS satellites (as of January 9, 2021 ) Began launching in 2018 with GPS III Available on 24 GPS satellites in late 2020s L1C ranging code The L1C pilot and data ranging codes are based on a Legendre sequence with length used to build an intermediate code (called a Weil code) which is expanded with a fixed 7-bit sequence to the required 10,230 bits.
After revision: Implementation will provide C/A code to ensure backward compatibility Assured of 1.5 dB increase in minimum C/A code power to mitigate any noise floor increase Data-less signal component pilot carrier improves tracking compared with L1 C/A Enables greater civil interoperability with Galileo L1 The current status of the L1C signal as of July 3, 2023 is: Developmental signal with message set "unhealthy" and no navigation data Broadcasting from 6 GPS satellites (as of July 3, 2023 ) Began launching in 2018 with GPS III Available on 24 GPS satellites in late 2020s L1C ranging code The L1C pilot and data ranging codes are based on a Legendre sequence with length used to build an intermediate code (called a Weil code) which is expanded with a fixed 7-bit sequence to the required 10,230 bits.