MC7304: Does GPRMC include results from GLONASS?

We are using MC7304 with a broadband antenna (GPS+GLONASS).
All GPS setup is left as factory default.

Often, we get reported many GLONASS-Satellites, but only a few GPS satellites.
In this case, the modem often does not send the GPRMC sentence via the GPS port.

Does this mean that the GPRMC sentence is based on GPS data only?

I think Yes…GPRMC will be received only with more number of GPS satellites.
You can check out the following links

Thanks & Regards,