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#11
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Thanks to all of you for sharing your experience. I have just
recently installed a Stormscope but don't have enough experience using it yet to know how much to trust it. A couple of times I have flown with Tstorm activity within range, the azimuth appears off by as much as 30 degrees - plan to bring it in next week to be checked. |
#12
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Thanks to all of you for sharing your experience. I do have a new
stormscope installed but haven't yet used it enough to know to what extent I can trust it. A couple of recent flights when Tstorms were within range show a possible 30 degree azimuth error (compared with where I thought the activity was via radar before takeoff), so I plan to bring it back to the shop next week. |
#13
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Tom Sixkiller ) wrote:
"Michael" wrote in message om... Face it - if you're going to fly IMC when there are T-storms around, you need some sort of weather avoidance gear. Relying on ATC is not a realistic option. It's not an option PERIOD. HUH? "Not a realistic option" "not an option PERIOD" ??? What am I missing that I interpret those two phrases as more similar than different? I shudder to think Michael is in the same skies as myself the rest of us. I do not understand how you could judge someone's abilities based on your subtle differences in interpretation. To me, newsgroup proclamations such as yours speak more about your ego than anything else. -- Peter ----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeed.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =--- |
#14
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"Nathan Young" wrote in message ... On Wed, 2 Jun 2004 22:52:16 -0700, "Tom Sixkiller" wrote: "Michael" wrote in message . com... Face it - if you're going to fly IMC when there are T-storms around, you need some sort of weather avoidance gear. Relying on ATC is not a realistic option. It's not an option PERIOD. I shudder to think Michael is in the same skies as myself the rest of us. Why? Michael flies a Twin Comanche equipped with Stormscope. Seems like a pretty capable setup for dodging tstorms. Equipment is neither knowledge, nor judgment. Re-read his original and how he interprets how ATC handles such requests. |
#15
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"Peter R." wrote in message ... Tom Sixkiller ) wrote: "Michael" wrote in message om... Face it - if you're going to fly IMC when there are T-storms around, you need some sort of weather avoidance gear. Relying on ATC is not a realistic option. It's not an option PERIOD. HUH? "Not a realistic option" "not an option PERIOD" ??? What am I missing that I interpret those two phrases as more similar than different? I shudder to think Michael is in the same skies as myself the rest of us. I do not understand how you could judge someone's abilities based on your subtle differences in interpretation. To me, newsgroup proclamations such as yours speak more about your ego than anything else. It speaks of what Michael has written in the past, plus his interpretation of the ATC process. Re-read his original. |
#16
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Tom Sixkiller ) wrote:
It speaks of what Michael has written in the past, plus his interpretation of the ATC process. Re-read his original. I did and I just don't see what you see. In fact, his interpretation of ATC during t-storms pretty much coincides with my IFR experiences in the northeast US. In his original post in this thread, what *specific advice* rubs your fur the wrong way? Show me what I am missing. I have been reading these groups for the last three years or so and during that time I have concluded that I would pay top dollar for some of Michael's time as an instrument instructor. Too bad I don't live closer to his home airport. Experience is the best teacher and to me his posts continually demonstrate that he has quality instrument experience. -- Peter ----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeed.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =--- |
#17
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#18
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#19
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Sometimes ATC can go too far to the other extreme and vector you around
even the smallest rain showers. Just the other day we were flying looking for some actual IMC conditions. There were pockets of rain (level 1 and 2), and ATC kept vectoring us around it. "Dan Luke" wrote in news:10bsid5r2ecpg78 @news.supernews.com: "PaulH" wrote: I have a fairly new IFR rating and am wondering how much help to expect from ATC on Tstorm avoidance. It is not something you can rely upon. Their equipment is not designed for it and it and individual controllers vary widely in their ability and inclination to help you. Be especially wary in or near Class B airspace - they have a lot of aircraft to separate and your t'storm problems may be way down on their priority list. Will they suggest re-routing or do you have to request it based on visual, FSS, or stormscope location? Get some weather display gear in your airplane and *tell* ATC where you need to go. If you are going to fly IFR when there are many CBs about, this is a must. The best thunderstorm avoidance tool is see-and-avoid, but if you can't see them with your eyes because you're in IMC, you'd better have a gizmo that can see them for you. |
#20
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Matt Whiting wrote:
It also looks at spectral spread using digital signal processing. I won't go into the physics of it unless someone insists, but the general principle is that a strong distant storm shows up as a longer duration (broader) peak than a close weak one, ON AVERAGE. I insist. I'll take a shot at it. A lighting strike is essentially an instantaneous electromagnetic pulse. What a mathematician would call a "delta function". As such, it is composed of a wide spectrum of frequencies (perhaps it's better to think of it as wavelengths). Different wavelengths travel at different speeds. This is why, for example, white light is broken up into a spectrum by a prism. Here's an analogy which may help explain what's going on. Let's say you have 10 cars starting out from the same spot, but each going at different speeds (60, 61, 62, ... up to 69 MPH). If you stand right at that spot, you see them all pass you at the same time. If you stand a mile away, the fastest one will pass you first, then the next fastest, and so on. They have spread out. If you stand 2 miles away, they will have spread out even more by the time they get past you. This is what's happening with a lightning strike. Right at the strike point, you've got all these different wavelengths of electromagnetic energy syncronized into one big spike. A mile away, the shorter wavelengths have gotten to you a little before the longer wavelengths (or is it the other way around?). Two miles away, the spread is even greater. The further you go away from the source, the more the various wavelengths have spread out, just like the cars moving at different speeds. This is called spectral dispersion. In the acoustic world, this is why a nearby lightning strike has a thunder clap that sounds like one big "zzzaappp", while further away it sounds like a rumble that goes on for a while. So, the theory is that if you look at the width (in time) of a pulse and compare it to its strength, you should get some idea of how much spectral dispersion it has undergone, and thus be able to estimate how far away it came from. It's not very precise, but it's good enough for a strike finder. To give any better explanation would require me to exercise neural pathways which have lain dormant for many years, and are probably best left that way. |
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