There is only one RINEX 3.04 file for one station (twtf). What about the other stations?
And in this file, only two BDS-3 satellites (C27,C37) are included, what about the other BDS-3 satellites?
For those two BDS-3 satellites, only one frequency data is observed, what about the other frequency like C7I?
Where can I find the observation data for BDS-3 staellites?
CDDIS is not able to answer which BDS satellites are tracked by certain stations. That would have to be a question to the IGS or the station operators.