CGGTTS
The position solver (-p) integrated to RINEX-Cli allows formatting
the PVT solutions in CGGTTS format.
CGGTTS format is a file format specified by BIPM that RINEX-Cli supports by combining the RTK-rs position solver to the CGGTTS library core, to form an efficient solver.
CGGTTS track formatting has the same requirements as SPP/PPP and the same behavior. You can customize the position solver to increase performance and output resolution.
CGGTTS is thought to represent 1E-9/1E-10 remote clock differences by performing two remote SPP/PPP position resolution. This is a so called "Time Transfer" technique although that term does not really make sense. It is truly a technique to compare two remote clocks. It is important to understand the file format is thought so the aposteriori comparison can take place at any point in time, and will always exhibit the same result. This is the main reason why CGGTTS uses UTC timestamps, whereas GNSS files, like RINEX, usually prefer GNSS timescales.
Another aspect of CGGTTS is it's measurement scheduling table. Expressed in UTC, it allows generating so called "synchronous" files on both remote sites. That means you can easily exchange those files are directly compare the clocks once you have reuninted the two files, usually over network communication.
Note that CGGTTS requires more computation than simple positioning, so it will always be slightly slower than the default position solver.
As previously stated, -p supports SPP code based precise position resolution.
When using RINEX-Cli with good quality data and this resolution strategy, you can rapidly generate CGGTTS files with some nanosecond precision.
