From iwx_warnings at goshenarc.org Tue Feb 20 00:35:34 2007 From: iwx_warnings at goshenarc.org (Severe weather warnings from NWS IWX.) Date: Mon, 19 Feb 2007 19:35:34 -0500 Subject: [IWX_warnings] Notice/update regarding email weather bulletins Message-ID: <20070220003559.40E423A004E@mail.goshen.edu> As many of you have noticed there have not been a lot of weather bulletins coming to you by email in the last month or so. The cold weather has exposed the slow failure of the LNB (low-noise block down-converter) on my Ku-band EMWIN satellite downlink. When LNBs get old, their center-frequencies become very temperature dependent. In other words, the colder outside it gets, the futher off-frequency it drifts, until the signal drops to below the noise threshhold. At that point the ingest engines locks up and no more message get parsed. So as long as the temperature stays above the mid-twenties, the data will keep flowing. A new LNB has been ordered, and hopefully the four-foot snow drift around the dish will melt about the same time the new LNB shows up. That's the update...it appears to be running smoothly right now with the temperatures mild, so we'll see what happens in the next week. If you are on more that one list, you have received one message for each list that you are on. Apologies for any duplicates. ---------------------------------------------------------- Calvin F. Swartzendruber calvinfs at goshen.edu From iwx_warnings at goshenarc.org Tue Feb 20 00:35:34 2007 From: iwx_warnings at goshenarc.org (Severe weather warnings from NWS IWX.) Date: Mon, 19 Feb 2007 19:35:34 -0500 Subject: [IWX_warnings] Notice/update regarding email weather bulletins Message-ID: <20070220003559.40E423A004E@mail.goshen.edu> As many of you have noticed there have not been a lot of weather bulletins coming to you by email in the last month or so. The cold weather has exposed the slow failure of the LNB (low-noise block down-converter) on my Ku-band EMWIN satellite downlink. When LNBs get old, their center-frequencies become very temperature dependent. In other words, the colder outside it gets, the futher off-frequency it drifts, until the signal drops to below the noise threshhold. At that point the ingest engines locks up and no more message get parsed. So as long as the temperature stays above the mid-twenties, the data will keep flowing. A new LNB has been ordered, and hopefully the four-foot snow drift around the dish will melt about the same time the new LNB shows up. That's the update...it appears to be running smoothly right now with the temperatures mild, so we'll see what happens in the next week. If you are on more that one list, you have received one message for each list that you are on. Apologies for any duplicates. ---------------------------------------------------------- Calvin F. Swartzendruber calvinfs at goshen.edu