The SAMOS at Manch has a "fixed" Cloud Base Recirder rather than a "scanning" CBR that Met had. therefore, we now have a rather more "objecive",[machine] rather than "subjective" [human] reading..
Eg SAMOS says CAVOK
We [the observers] say 9999 -RA FEW025 BKN045.
Fault with the "equipment", or fault with the "observer"
At 5DME, on 24R you are over Stockport. We ain't got a CBR
in Stockport. To be fair, Met have asked us about wx in the past,
None of us are perfect, at the end of the day
we report what we see or at least, what we "interpret".
If you want a look, call the Tower Sup for a visit
watp,iktch