cgps has its own codes for the different GNSSs. I think it would be nice if GPSd/cgps would use the same abbreviations as in other software packages (Trimble TPP, U-Center, rtklib, etc.)
The following tables shows the different systems and currently used short char ids. Is it possible to switch to either 3-char ids or if that is too long, using the 1-char codes for the GNSSs.
| Name | 3-char | GPSd 2-char | 1-char | GPS | GPS | GP | G | GLONASS | GLO | GL | R | GALILEO | GAL | GA | E | BeiDou | BDS | BD | C | QZSS | QZS | QZ | J | SBAS | SBS | SB | S | IRNSS | IRN | IR | I | IMES | | IM |