This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
>From: Jim Koermer <address@hidden> >Organization: Plymouth State >Keywords: 200211121541.gACFftL21487 IDD Unidata-Wisconsin MDR Hi Jim, >BTW, I've been keeping close tabs on various data that we receive >through our NOAAPORT system and that is also received via IDD. The IDD >feed is far from reliable. As an example, several hourly MDR radar >summary product files (received via IDD) are woefully populated with >data or missing altogether during each 24-hour period. If you are referring to the MDR images in the Unidata-Wisconsin datastream, the problem may be something other than the IDD. The MDR radar images are created from NOAAPORT data at SSEC. If the data is spotty within an image, it may mean that the data was spotty in the NOAAPORT data it was created from. If the product is missing altogether, it may mean that SSEC did not receive the data on their NOAAPORT ingest system, or some step in the process of creating the product failed. >These are small products, so you would expect better reliability. I don't think that the lack of the product can automatically be interpreted as the failure of the IDD to deliver it. It would be interesting/instructive to see if the NEXRAD composites created by the UPC on motherlode are received at Plymouth reliably at the same time the MDR products are not. If they are, it means that the problem is not in the delivery mechanism, but, rather, in the product creation mechanism. >Surface hourly >observations also show degradations from time to time each day. This is more telling than the lack of MDR data. Given this, I would like to see you move up to a more current release of the LDM. The reason for the upgrade would be so you could start reporting realtime statistics that would help us track your IDD data reception quality. The most recent LDM release, LDM 5.2.2, is only available in source form, so an upgrade would mean that you would have to build it and not install a binary. >Our >NOAAPORT system proves much greater reliability. However, our building >is being expanded and fully renovated and we are still trying to keep >our NOAAPORT system running in that building despite the >construction--something that does not always work out too well. Cheers, Tom -- +-----------------------------------------------------------------------------+ * Tom Yoksas UCAR Unidata Program * * (303) 497-8642 (last resort) P.O. Box 3000 * * address@hidden Boulder, CO 80307 * * Unidata WWW Service http://www.unidata.ucar.edu/* +-----------------------------------------------------------------------------+