xiaohonghuang

Sorry, my view on LLI was wrong earlier. Here is our decode_rxmrawx function. It detailed how we obtained the SPP_LLI. And the RTK_LLI is obtained by RTK_LLI=SPP_LLI(rover)+SPP_LLI(base). static int8_t decode_rxmrawx(raw_t*...

Here is a simple correction demo: RTK_P=SPP_P(rover)-(SPP_P(base)-db), RTK_L=SPP_L(rover)-(SPP_L(base)-db/wave_length), with db=geometry range between satellite and base station.

[See here](https://github.com/tomojitakasu/RTKLIB/blob/master/src/pntpos.c). function rescode(): vare[i] : sat_var vion : ion_var vtrp : trop_var

The ionospheric and tropospheric corrections were already implemented during our hardware data collection, so yes, the following variables were corrected before input. double SPP_P[NFREQ];//Rover-only pseudorange measurement(with correction) [m] double SPP_L[NFREQ];//Rover-only...

Yes, the initial rover position is estimated by SPP, which is good enough for correction.

which positioning mode?

The preprocessing of differential observations is very simple and can be handled with RTKLIB(check the zdres function), and errors in this part are unlikely—look elsewhere for the issue. Or just...

First, as mentioned in my paper, it’s sufficient to pair a rover with any base station whose observation epoch differs by less than one second; precise time alignment is unnecessary....