Wind Data

[callum91]

Hello

I have recently changed my Data log interval from 10 min to 1 min because Cumulus wasn't recording wind gusts, however, is there a way of retrieving all the gusts that were missed because they are still stored in the unit but cumulus has not downloaded them?

Regards

Callum

[steve]

It depends on when these gusts occurred (i.e. whether Cumulus was running at the time or not), and what interval you have your logger set to.

Cumulus downloads all the data from the logger which the station logged while Cumulus wasn't running, irrespective of the interval you have configured in Cumulus.

If you had the station logger set to less than 10 minutes (and it can only go down to 5 minutes), then the station logger will have more entries recorded than Cumulus for the periods when Cumulus was actually running, so yes, you could get more data points by getting Cumulus to download the logger data, by restarting from a backup or by manually rewinding the Cumulus data to the point you want to download from.

If your logger is set to 10 minutes or more, then you can't hope to get any more data than you already have.

[callum91]

If you had the station logger set to less than 10 minutes (and it can only go down to 5 minutes), then the station logger will have more entries recorded than Cumulus for the periods when Cumulus was actually running, so yes, you could get more data points by getting Cumulus to download the logger data, by restarting from a backup or by manually rewinding the Cumulus data to the point you want to download from.

How do I manually rewind the cumulus data to the point I want to download from i.e. the start which was the 23/09/09 I think without destroying the records?

[steve]

How do I manually rewind the cumulus data to the point I want to download from i.e. the start which was the 23/09/09 I think without destroying the records?

I don't understand what that is going to achieve? If your logger is set to 5 minutes (which is what it would have to be to improve on the 10-minute Cumulus setting) your logger can hold about 2 weeks worth of data, so only back as far as about 9th November. If your logger data goes back as far as 23rd September, that implies your logger interval is 20 minutes or more, so if you use that data instead of what you have now, how can you get more data points?

[callum91]

Sorry but I don't really understand how this system works.

Basically, my Watson weather station currently shows in its records a maximum gust of 46.8 knots but because I had my Cumulus data log interval set to 10 minutes at the time, it never got recorded by Cumulus (and Cumulus wasn't running at the time). But now I have changed my time interval to 5 minutes but it still doesn't show the 46.8 knot gust in the Averages/Extremes and does not show any gusts on the graphs from before when I had it set to 10 minutes.

I was wondering if there was a way of making Cumulus download all the past data from the weather station, including the 46.8 knot record.

Regards

Callum

[steve]

Cumulus doesn't use the all-time records from the station, it generates its own. If it had been running at the time, it would have seen that value and set it as the all-time record. Changing the Cumulus log interval has nothing to do with this; if Cumulus is running it logs at the specified interval, but notes daily and all-time highs from the live data it reads from the station.

If Cumulus isn't running when an all-time record occurs, then the chances of Cumulus spotting that record are increased by improving (decreasing) the station logger interval. There is still a chance however, because the minimum station logger interval is five minutes, that the all-time high won't get logged by the station (other than in the separate area for all-time records), and hence won't be seen by Cumulus.

But now I have changed my time interval to 5 minutes but it still doesn't show the 46.8 knot gust in the Averages/Extremes and does not show any gusts on the graphs from before when I had it set to 10 minutes.

Changing either the station or Cumulus logging intervals can't have any effect on what has already gone.

I was wondering if there was a way of making Cumulus download all the past data from the weather station, including the 46.8 knot record.

Cumulus has already downloaded all of the past data from the station that is available to be downloaded, with the exception of that single all-time high gust value. You can use the all-time record editor in Cumulus to set the all-time record to that value.

[callum91]

OK thank you that makes sense.