Hi Gerardo,
L1-logs from Reach RS+ can be processed with NRCAN only. According to the test provided by one of our users, the maximum horizontal accuracy it’s possible to get is 15-30 cm.
L1-receivers don’t require antenna calibration. The only thing that may be essential for post-processing raw data from Reach RS+ is the distance from the bottom of the device to APC, which might be considered as 65 mm.