atmospheric ducting sound

Placing the antenna on the top most position to see the radio horizon is the best known way to track more flights. THE NATIONAL WEATHER SERVICE BELIEVES THIS PHENOMENON IS BEING CAUSED BY THUNDER FROM DISTANT LIGHTNING STROKES… BOUNCING OFF A VERY STABLE LAYER ABOVE THE GROUND. It was certainly unusual, and for those residents – a bit scary, but it was not a funnel cloud or tornado. Is this also backed by a phenomena called atmospheric ducting? This reminds very much of the sounds of distant stationary jet engine testing. One of the titles also mentioned that.While operating radar over various oceans I have experienced ducting.

Not sure how there would be a flash of light without the sound of a jet engine explosion. It extends from 4 to 40 miles (about 6 to 60 km) above the surface. Several years ago, I was camping at a state park by a large reservoir. Post was not sent - check your email addresses! (Miriam O’Brien aka slandering “Sou” from Hotwhopper, that means you. Calculations reported here show various ducted modes, namely, the quasi-surface modes, the fully ducted modes, and the imperfectly ducted mode.

The ducting mechanism of acoustic-gravity waves in a thermally stratified atmosphere with spherical geometry is investigated analytically. Or it could be an ESD at a gas plant or compressor station… don’t know where it is or how proximal it might be to some such plant or well, but that would be my guess.Being a spotter I’m reading this article and all comments with interest. And 20min would be a short test. We’re at about the same altitude as the airport and have an unbroken line of sight view of it though we can’t see it from here. bob k6rtm waves are reflected by the ionosphere.Atmospheric ducting is a mode of propagation of electromagnetic radiation, usually in the lower layers of Earth’s atmosphere, where the waves are bent by atmospheric refraction.Signals in a higher refractive index layer, i.e., duct, tend to remain in that layer because of the reflection and refraction encountered at the boundary with a lower refractive index material.Signals in a higher refractive index layer, i.e., duct, tend to remain in that layer because of the reflection and refraction encountered at the boundary with a lower refractive index material.In some weather conditions, such as inversion layers, density changes so rapidly that waves are guided around the curvature of the earth at constant altitude.Ducting propagation between air layers in the lower atmosphere It seemed to go on for far too long to be an aircraft, but I always thought it had to be either that or a missile launch. Usually, I keep trying to go back to sleep while the noise drones on and on, but I did get up to investigate once and it abruptly faded out just like it did in that video before I could pin it down (although I saw no flash of light).This effect is well known and exploited by submarines and whales in the ocean. The ducting mechanism of the "leaky" gravity wave … A method and system for reducing the effects of atmospheric ducting on wireless transmissions, wherein a wireless communication system is comprised of a plurality of base stations having antennas, each base station having a beacon signal transmitter and a beacon signal receiver. We got shut down that night because a local judge that reportedly lived a couple of miles away couldn’t go to sleep. Please check your email for instructions on resetting your password.

Sudden flash of light and it stops instantly?This reminds me of a different phenomenon where sound is carried across a body of water. )For permission, contact us. Not Available adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A THIS IS CALLED DUCTING…AND CAN ALLOW SOUND TO TRAVEL UNUSUALLY LONG DISTANCES.

September 12, 2017, 7:32am #1. It too sounds like a freight train only this one sounds like it’s derailing…Reddish light reflecting off of inside wall in a few frames, sounds like a spoof, with a kerosene jet heater running behind the camera. We have one at Islip MacArthur Airport.

Microwatt light pulses can be reliably received over 2400 miles from the source using this technique.I get this all the time. I looked out, didn’t see a band… so I started walking. The closest train track is 20 miles away on the other side of the river but every once in a while, I hear a train horn and engine noise that sounds like it is just out in the front pasture.I live near the approach pattern of a naval air station.

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