Satellites show up multiple times

[Andreas B]

Hi all,

I'm using a ublox ZED-F9P with default settings, which works great.

Some satellites have two entries in the seen/used list in cgps. In
this case, a number is appended to the constellation abbreviation for
the second entry (see e.g. below). In xgps, no number is appended.
When the satellite shows up two (or more?) times in the list, does
this refer to the receiver using several frequencies from the
satellite (L1, L2,L5)? The SNR difference between the two entries of
PRN 7 is 11, which really seems to be alot. Why this big difference?

│        PRN  Elev   Azim   SNR  Use│
│GP        7  21.0  313.0    27.0   Y │
│GP3      7  21.0  313.0    16.0   Y │
│GP        8  34.0  282.0    22.0   Y │
│GP3      8  34.0  282.0    26.0   Y │
│GP      16  57.0  205.0    22.0   Y │
│GP      18  39.0   68.0     12.0   Y │
│GP3    18  39.0   68.0     17.0   Y │
│GP      20  49.0  110.0    26.0   Y │
│GP      27  69.0  271.0    26.0   Y │
│GP3    27  69.0  271.0    25.0   Y │
│GL      66  20.0   13.0       8.0   Y │
│GL2    66  20.0   13.0     21.0   Y │
│GL      67  36.0   70.0     13.0   Y │
│GL2    67  36.0   70.0     13.0   Y │
│GL      68  17.0  124.0    27.0   Y │
│GL2    68  17.0  124.0    18.0   Y │

Best,
Andreas