cgps question

[Nick Taylor]

Hi

Apologies if this in docs somewhere....

Under cgps I see one satellite showing uN under Use column

What does the u mean?

root@TSB-167:~# cgps -V
cgps: 3.26.2~dev (revision release-3.26.1-96-gc9b490e32)
root@TSB-167:~#

TIA

Nick