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Estimated Time Of The Next Arrival Of POES Data

Volker Grassmann, DF5AI

August 5, 2003

Please note that the POES webpage now provides an additional information which is very helpful in Aurora dx openings, i.e. display of the estimated time of the next arrival of POES data. I wish to express my special thanks to Mr. Evans and the POES team members for providing this new feature.

Mr Evans wrote on August 4, 2003:

Dear Mr. Grassman

In your kind (and very informative) reply to my questions of last June, you suggested that it would be helpful if we could provide some information about when the next update of POES auroral data is to be expected.

It took some effort, but we believe that we have a working system now. On our main pmap page we have added a line providing the estimated time of the next (most recent) arrival of POES data. This time is based upon the satellite acquisition schedule that NOAA puts on their web page. In the software we developed we always choose that batch of data that contains the closest subsequent start time from the most current data we have.

The system seems to be working all right although ocassionally NOAA will miss a scheduled satellite pass and a most recent update will not occur for some time after the time we have posted. This does not happen very often.

Also, it is the nature of the POES data recovery system that almost always the most recent complete satellite pass over the polar regions is from the southern hemisphere. We, of course, use the southern hemisphere estimate of the level of activity to judge the situation in the northern hemisphere.

I would like to thank you for you suggestion which we think was a very helpful one.

With best regards

Dave Evans


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