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Are these data spikes?
Posted: Mon 03 Sep 2012 11:33 pm
by freedem
Please see these images comparing my WX to two airports within a 15 mile radius, one of the airports is an international hub. My data (E0911) sems to be spikey... Is my interpretation correct? If so, how do I fix it on my FO?
Thanks in advance!
Re: Are these data spikes?
Posted: Tue 04 Sep 2012 6:46 am
by steve
I can't see anything wrong? You certainly don't have any spikes. Your temperature is perhaps a little on the high side, particularly during the daytime - an effect of the sun, perhaps.
Re: Are these data spikes?
Posted: Tue 04 Sep 2012 8:29 am
by mcrossley
I think it is just a resolution thing. The airports only report the pressure to the nearest whole unit of hPa, the FO to 0.1 hPa. At 0.1 hPa resolution you will see the value varying a little around the general trend.
Re: Are these data spikes?
Posted: Tue 04 Sep 2012 10:56 am
by freedem
Thanks. I was wondering what was meant by "spikes".
Re: Are these data spikes?
Posted: Tue 04 Sep 2012 11:06 am
by steve
freedem wrote:I was wondering what was meant by "spikes".
In the context of Fine Offset stations, it's where a reading suddenly changes by an impossibly large amount, and then immediately back again to normal levels, e.g. a one-off wind speed of 70 mph on a relatively calm day.