xgps and cgps are flickering

[gpsd]

Yo Gary, and others

    environment
    hw: raspberry pi4, Ublox ZED-F9P Expansion from uputronics 
    sw: Debian bullseye, gpsd: 3.24.1~dev (revision
    release-3.24-211-gfda79f2b8)

When I use my 6 year old gps-hat I learned to have one update per second using xgpd or cgps

    With the new ZED-F9P there are 2 updates per second but not even
    this, it shows different information. 
    One view shows about 76 seen satellites and 36 used the other view
    shows about 44 satellites and 16 used

It's obviously it has something to do with the GPGSV sentence. There are two blocks within one second. The first one has 11 messages the other has 19 messages. Of course this varies from time to time.

2022-07-28 18:33:51.238998: $GPGSV,11,1,44,02,28,268,35,04,09,089,00,05,23,311,28,06,16,214,22*4D
2022-07-28 18:33:51.239038: $GPGSV,11,2,44,07,79,112,14,09,43,086,28,11,32,249,37,13,09,270,24*4D
2022-07-28 18:33:51.239062: $GPGSV,11,3,44,14,05,170,28,16,11,032,10,20,55,289,17,30,58,209,32*42
2022-07-28 18:33:51.239085: $GPGSV,11,4,44,36,33,160,29,40,23,133,00,49,34,195,00,303,58,292,22*73
2022-07-28 18:33:51.239107: $GPGSV,11,5,44,305,63,083,14,308,08,281,11,309,12,096,00,313,18,320,23*47
2022-07-28 18:33:51.239130: $GPGSV,11,6,44,315,28,265,32,324,43,090,14,325,26,157,32,331,19,040,00*43
2022-07-28 18:33:51.239152: $GPGSV,11,7,44,334,11,216,33,402,05,108,00,407,22,076,00,409,12,067,00*48
2022-07-28 18:33:51.239174: $GPGSV,11,8,44,410,23,088,09,414,38,302,30,421,69,123,00,422,08,123,13*42
2022-07-28 18:33:51.239196: $GPGSV,11,9,44,424,09,204,33,426,50,179,31,428,07,314,00,69,33,104,22*70
2022-07-28 18:33:51.239216: $GPGSV,11,10,44,70,71,348,00,71,24,306,29,73,14,188,27,79,44,046,21*72
2022-07-28 18:33:51.239239: $GPGSV,11,11,44,80,56,156,00,85,07,249,21,86,21,292,00,87,11,351,08*72
2022-07-28 18:33:51.561040: $GPGSV,19,1,76,02,28,268,35,02,28,268,00,04,09,089,18,04,09,089,00*4E
2022-07-28 18:33:51.561081: $GPGSV,19,2,76,05,23,311,28,05,23,311,29,06,16,214,29,06,16,214,22*48
2022-07-28 18:33:51.561110: $GPGSV,19,3,76,07,79,112,14,07,79,112,27,09,43,086,21,09,43,086,28*4A
2022-07-28 18:33:51.561138: $GPGSV,19,4,76,11,32,249,37,11,32,249,34,13,09,270,24,14,05,170,28*43
2022-07-28 18:33:51.561166: $GPGSV,19,5,76,14,05,170,21,16,11,032,10,16,11,032,00,20,55,289,17*46
2022-07-28 18:33:51.561194: $GPGSV,19,6,76,20,55,289,00,30,58,209,32,30,58,209,30,36,33,160,29*4C
2022-07-28 18:33:51.561222: $GPGSV,19,7,76,40,23,133,00,49,34,195,00,303,58,292,22,303,58,292,21*47
2022-07-28 18:33:51.561249: $GPGSV,19,8,76,305,63,083,22,305,63,083,14,308,08,281,11,308,08,281,00*4D
2022-07-28 18:33:51.561273: $GPGSV,19,9,76,309,12,096,00,309,12,096,00,313,18,320,23,313,18,320,27*4D
2022-07-28 18:33:51.561302: $GPGSV,19,10,76,315,28,265,32,315,28,265,37,324,43,090,14,324,43,090,19*79
2022-07-28 18:33:51.561330: $GPGSV,19,11,76,325,26,157,32,325,26,157,33,331,19,040,00,331,19,040,00*71
2022-07-28 18:33:51.561356: $GPGSV,19,12,76,334,11,216,33,334,11,216,22,407,22,076,21,407,22,076,00*70
2022-07-28 18:33:51.561383: $GPGSV,19,13,76,409,12,067,21,409,12,067,00,410,23,088,09,410,23,088,21*7B
2022-07-28 18:33:51.561411: $GPGSV,19,14,76,414,38,302,37,414,38,302,30,421,69,123,00,422,08,123,13*74
2022-07-28 18:33:51.561437: $GPGSV,19,15,76,422,08,123,00,424,09,204,33,426,50,179,31,426,50,179,00*77
2022-07-28 18:33:51.561464: $GPGSV,19,16,76,69,33,104,22,69,33,104,20,70,71,348,00,70,71,348,00*75
2022-07-28 18:33:51.561493: $GPGSV,19,17,76,71,24,306,29,71,24,306,28,73,14,188,35,73,14,188,27*74
2022-07-28 18:33:51.561518: $GPGSV,19,18,76,79,44,046,21,79,44,046,11,80,56,156,00,80,56,156,00*7A
2022-07-28 18:33:51.561542: $GPGSV,19,19,76,85,07,249,14,85,07,249,21,87,11,351,08,87,11,351,00*76

The interesting part is that some satellites are in both blocks, for example 02 or 05. Sat 05 is even twice in the same block only SNR is different.

Is there a way to switch off this permanently switching between two views ?  Maybe a hidden option or key combination ?

Kind regards

Hans