Solar graphs lagged one hour [Solved]

Werk_AG · Post by **Werk_AG** » Sun 15 Feb 2015 6:49 pm

This may be another issue with international settings. Just for you to know.
This only happens with the Solar / UV graphs

Test system: Windows 7
Regional settings: PT

mcrossley · Post by **mcrossley** » Sun 15 Feb 2015 7:05 pm

Isn't Portugal in the same TZ as the UK - i.e. currently running UTC?

Is your longitude set correctly?

Werk_AG · Post by **Werk_AG** » Sun 15 Feb 2015 7:27 pm

Yes, we are in UTC now.

For lat and long I'm using the same settings than in Cumulus1

Latitude=39.226
Longitude=-8.99
LatTxt=N 39° 13' 34"
LonTxt=W 08° 59' 50"

Same data from a PI, running with GB settings

Post by **steve** » Mon 16 Feb 2015 12:33 pm

The routine I use for calculating the sun position uses UTC, so I get .Net to convert the current system time to UTC using .ToUniversalTime(). It appears that for some reason it is subtracting an hour on your system. I'll do some experimenting on my system. It would be useful to know if anyone else is seeing the same thing.

ayde_bury · Post by **ayde_bury** » Mon 16 Feb 2015 4:15 pm

Portugal is about 8 or 9 degrees West.

You have set your longitude to East using the negative figure, hence the 1 hour lag.

Post by **steve** » Mon 16 Feb 2015 4:25 pm

East is positive, West is negative. Possibly astronomers use the opposite. It's to avoid this confusion that Cumulus requires you to explicitly choose East or West.

ayde_bury · Post by **ayde_bury** » Mon 16 Feb 2015 4:33 pm

Apologies Steve, that is my Astronomy side coming out

Werk_AG · Post by **Werk_AG** » Tue 17 Feb 2015 12:43 am

steve wrote:The routine I use for calculating the sun position uses UTC, so I get .Net to convert the current system time to UTC using .ToUniversalTime(). It appears that for some reason it is subtracting an hour on your system. I'll do some experimenting on my system. It would be useful to know if anyone else is seeing the same thing.

Somehow the longitude value in my W7 test PC was lost is minus sign, and also the decimal part (the same for latitude). I have now corrected the values and the graph is plotting well.

Sorry Steve, Mark and ayde_bury, for making you lost your time. I should have checked before posting.

Cumulus Support

Solar graphs lagged one hour [Solved]

Solar graphs lagged one hour [Solved]

Re: Solar graphs lagged one hour

Re: Solar graphs lagged one hour

Re: Solar graphs lagged one hour

Re: Solar graphs lagged one hour

Re: Solar graphs lagged one hour

Re: Solar graphs lagged one hour

Re: Solar graphs lagged one hour