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mark sky
Joined: 14 Oct 2000
Posts: 3616
Location: SW coast of Oregon |
 Mon Nov 19, 2001 7:18 pm
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Putting up the periscope on this thread again
Surfacing for a breath of "air"
What about a submarine? Aren't they able to do 36 miles per hour? |
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Deb
Joined: 04 Oct 2001
Posts: 163
Location: Plainfield, Indiana USA |
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Thu Jan 24, 2002 2:35 am
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Although this capture of ship trails says 2200, mark sky said it was taken around 11:30AM Pacific. I utilized the new NASA tool to see if these trails showed up at that time -
http://cdebsjournal.topcities.com/Jan2302.htm
So sorry, I guess I should have stated the satellite capture was posted a little after NOON today by mark sky at Carnicom's board, where he calls them "ship trails."
Edited again - OK, now I get it. mark sky didn't capture the satellite shot, he just posted the link, so it keeps updating. That explains the time difference. Also looking at it now, about 12 hours later, the trails have attached to an approaching weather front.
[Edited 2 times, lastly by Deb on 01-23-2002] |
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3T3L1
Joined: 08 Mar 2001
Posts: 1344
Location: Lubbock, Texas |
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Thu Jan 24, 2002 8:09 pm
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Here's the picture from the GOES-10 archive:
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Deb
Joined: 04 Oct 2001
Posts: 163
Location: Plainfield, Indiana USA |
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Thu Jan 31, 2002 5:27 am
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mark, the links aren't working, so I can't comment.
The question remains, though, were they ship or jet trails? As far as how wide they were, I'm not qualified even to make a guess. However, what comes to mind are the trails from military jets on Sept. 12 across Ohio to Virgina. Scroll down to the middle of the page where it says September 12, 2001- http://cdebsjournal.topcities.com/post911Satshots.htm
Kim Weber saw them, and as explained in The Environmental News article about Dr. Minnis and his obsevations that day, those trails look pretty wide-spread on the satellite shots too. |
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Molliani
Joined: 16 Mar 2001
Posts: 428
Location: Illinois |
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Thu Jan 31, 2002 10:13 am
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Here are a few excerpts from
Dr Dale Irelands web site.
You'll find a great picture of ship trails
and contrails - an interesting contrast.
I wish our "west coasters" could have
a "ground station" system like Dales and link it to Chemtrail Central.
I am envious - NOT GREEN - just envious
Please visit his most interesting web site.
PLANET DALE
DALE IRELAND'S
ASTRONOMY PAGE
http://www.drdale.com/
Photographs, Diagrams, Charts, Fabrications(*)
LIVE VIDEO CAMERA
Weather and astronomical events from my back porch
This web site is a collection of my personal work over the past few years.
All of the photographs, images, diagrams, and charts were created by me.
This page has been officially designated as Messier object M102
Comets, Eclipses, Satellites, Nature Photography, News, Trivia, Occultations
Satellite Weather Images of the western U.S. and Canada I receive daily with my low budget "ground station".
(These are low orbit images, NOT those you see on TV or internet weather sites)
click on images below to select topic
music control
comet page, eclipse page, photo page, satellite page, trivia, news
Dale Ireland's LIVE CAM
and Satellite Images of Silverdale, WA. 47.7N, 122.7W
The camera is pointed out our back window E.N.E. across the northern end of Dyes Inlet, an arm of Puget Sound, 20mi west of Seattle, Washington State, USA. The tidal variation here can be up to 14ft in 6hrs. Camera updates every 30 minutes dawn to dusk.. The time is PST, Pacific Standard Time, (GMT -8hrs). If I am home when there is something interesting on the beach like a Heron or Eagle I may grab an image and leave it up for a few hours, so the webcam may stop updating for a while.
These are images that I receive directly from the weather satellites. They are low orbiting NOAA sats that come over a couple times each day. I receive the signals with a scanner type radio, and a small antenna, and feed the sound signal into my computer where it is converted to a photo with the freeware program WXSAT. It is easy to do, a cheap police band scanner and 2 ft all-band antenna is all that is required, and you need to know when the satellites will pass over you. I add the map grid with Adobe Photoshop.
Click HERE to see my satellite receiving station and an explanation of how easy it is to do.
contrails from ship exhaust (not airplanes).
Click HERE for more images of Ship Trails and Jet Contrails
how they are different and how to identify them.
Ship Trails and Jet Contrails on NOAA Weather Satellite Images
The image below shows condensation trails from ships covering thousands of miles west of California
click on images for larger view
Below is a rare image showing both ship contrails and jet contrails
The contrails are very different.
Ship contrails are low, warm, "fog", seeded by sulphuric acid droplets and unburned hydrocarbons from ship exhaust.
Jet contrails are very high, extremely cold ice crystals.
The image above is shown again below in two versions, infrared on the left and visible on the right.
Jet contrails are most easily seen in the infrared images because their cold temperature makes them very bright white. They are usually hard to spot in visible images because they are narrow and do not persist very long. Jet contrails appear over both land and sea, and are much straighter than ship trails because the are so short lived.
Ship trails last for hours or days and twist into many shapes as they are blown by light low level winds. Their shape does not denote the ship's path since the wind may move the trails hundreds of miles. Ship trails are large and bright in the visible light images but invisible on the infrared because they are low and almost the same temperature as the sea surface.
Same image, infrared channel left and visible channel right
This is another close-up of the same visible image as above showing the jet contrails in more detail. Close inspection reveals the contrails as well as their shadows cast on lower level clouds.
All of the photographs, images, diagrams, and charts may not be used or displayed without my written permission, copyright 1997, Dale E. Ireland. direland@drdale.com I appreciate any comments, suggestions or corrections. My location is Latitude 47.7N, Longitude 122.7W in the city of Silverdale, Washington State, USA. I am a dentist. I maintain a solo, family oriented, general practice.tip of the month (68k wav)
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Deb
Joined: 04 Oct 2001
Posts: 163
Location: Plainfield, Indiana USA |
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Thu Jan 31, 2002 1:40 pm
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WOW! Molliani, great post! Thanks for the "turn-on." And he's just a dentist from Puget Sound. |
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3T3L1
Joined: 08 Mar 2001
Posts: 1344
Location: Lubbock, Texas |
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Thu Jan 31, 2002 3:22 pm
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Thanks, Molliani! Here is part of his section on ship trails vs. contrails:
quote:
Below is a rare image showing both ship contrails and jet contrails
The contrails are very different.
Ship contrails are low, warm, "fog", seeded by sulphuric acid droplets and unburned hydrocarbons from ship exhaust.
Jet contrails are very high, extremely cold ice crystals
[Edited 1 times, lastly by Lulu on 06-22-2003] |
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