Issue 139 in wfrog: wh1080 pressure and rain fudge factors are wrong

[wf...@googlecode.com]

Status: New
Owner: ----
Labels: Type-Defect Priority-Medium

New issue 139 by m...@williamgrant.id.au: wh1080 pressure and rain fudge
factors are wrong
http://code.google.com/p/wfrog/issues/detail?id=139

What steps will reproduce the problem?
1. Configure wfrog with a wh1080 station and altitude from GPS.

What is the expected output? What do you see instead?
Relative pressure appears 4-5hPa higher than on nearby reliable barometers.

Removing the abs_pressure fudge factor of 4.5 that was added to wh1080.py
in r810 brings the values back into a sensible range, closely matching
expected values.

Rain is harder to judge, but from the limited data I have the fudge factor
of 1.36 just makes an already inaccurate instrument substantially less
accurate. I knew both values were suspect immediately, as their
implementation is weird and doesn't necessarily look well thought out (eg.
the *10 and /10 for abs_pressure directly cancel out, and the rain
correction would better be implemented as a straight *1.36).

What version of the product are you using? On what operating system?
svn r953 is bad, and going back to 0.8.2 works fine.

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