Welcome to the Cumulus Support forum.
Latest Cumulus MX V4 release 4.4.2 (build 4085) - 12 March 2025
Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
If you are posting a new Topic about an error or if you need help PLEASE read this first viewtopic.php?p=164080#p164080
Latest Cumulus MX V4 release 4.4.2 (build 4085) - 12 March 2025
Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
If you are posting a new Topic about an error or if you need help PLEASE read this first viewtopic.php?p=164080#p164080
Search found 7 matches
- Wed 17 Feb 2016 9:31 pm
- Forum: Cumulus 1 (No longer being developed)
- Topic: Pressure trends and solar tide compensation
- Replies: 8
- Views: 3347
Re: Pressure trends and solar tide compensation
Er, no. Dont need central heating here, unlike your local temperature !. See attached for temps for the same period :D The pressure sensor is inside, of course, so it only sees about +/- 1 deg change here. Insulation does that. You can see on the last day that I left the windows and doors open, so w...
- Tue 16 Feb 2016 10:57 pm
- Forum: Cumulus 1 (No longer being developed)
- Topic: Pressure trends and solar tide compensation
- Replies: 8
- Views: 3347
Re: Pressure trends and solar tide compensation
Thanks freddie. I got to the Wiki too. Should probably have gone there first. Still find it odd that there should be such a big 12 hour component, but I am an electronics engineer, not a meteorologist. Having read the relevant bit, I still dont 'get it'. Even if the heating is roughly square wave - ...
- Tue 16 Feb 2016 10:13 pm
- Forum: Cumulus 1 (No longer being developed)
- Topic: Lux display
- Replies: 2
- Views: 1317
Re: Lux display
Thanks Steve. Certainly I am using a laptop with a relatively small screen, and odd font settings. No problem. Probably the decimal point on the lux number is a bit overkill for such a big number FWIW.
- Tue 16 Feb 2016 10:10 pm
- Forum: Cumulus 1 (No longer being developed)
- Topic: Pressure trends and solar tide compensation
- Replies: 8
- Views: 3347
Re: Pressure trends and solar tide compensation
Hmm, I dont doubt that the meteorologists know what they are doing, but if the pressure changes are temperature related, how come I see two peaks per 24 hours. I always thought ( from one of the first number crunching exercises I did way back in Uni days ) that the pressure change was due to gravita...
- Tue 16 Feb 2016 2:52 am
- Forum: Cumulus 1 (No longer being developed)
- Topic: Lux display
- Replies: 2
- Views: 1317
Lux display
Cumulus 1.94 build 1099 Its a really bright sunny day here, and just noticed that the lux reading down the bottom of the main display shows 25222.0 lux, Solar radiation of 989 w/m2. Using the conversion of 0.0079 lux to w/m2 backwards shows the lux reading should be 125222.0, ie the leading 1 overfl...
- Thu 11 Feb 2016 10:35 pm
- Forum: Cumulus 1 (No longer being developed)
- Topic: Pressure trends and solar tide compensation
- Replies: 8
- Views: 3347
Re: Pressure trends and solar tide compensation
Thanks Steve, Thats what I thought from the displayed effects. I might play with some pressure trend analysis and run some Fourier transforms, to see if I can 'improve' the figures. Great software ! And really easy to get going with the WH3081 station I bought. I had an Acurite station before this, ...
- Thu 11 Feb 2016 3:41 am
- Forum: Cumulus 1 (No longer being developed)
- Topic: Pressure trends and solar tide compensation
- Replies: 8
- Views: 3347
Pressure trends and solar tide compensation
A search did not turn up anything about this. Does the pressure trend number take account of the daily solar atmospheric tide pressure variation ? Typically it amounts to about 2 HpA over 6 hours, so about 0.3 Hpa per hour. Not much, but it does influence what you see when tracking a slow oncoming f...