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General Astronomy >> General Observing and Astronomy

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Puck Ja
scholastic sledgehammer
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Reged: 11/21/12

Loc: OK, USA
High transparency after storm? new
      #5702623 - 02/26/13 10:40 PM Attachment (12 downloads)

I have been using SSEC Geostationary Image to help my observation session. Tonight after the Rocky storm I found the 6.3um image shows a great "dark band" across US continent. I was excited about it and tried to do some DSO observation. Unfortunately I was too late and the moon was just too bright to do any meaningful DSO observation. So I wonder if anyone has had a good viewing before moon coming up.

I remember a great night in Feb. that was new moon and I had darkest background and greatest DSO hunting night. I have been trying to catch those great evening ever since.


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Tony Flanders
Postmaster
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Reged: 05/18/06

Loc: Cambridge, MA, USA
Re: High transparency after storm? new [Re: Puck Ja]
      #5703001 - 02/27/13 07:47 AM

Yes, after storms we in the Northeastern U.S. generally have superb transparency coupled with abysmal seeing.

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csrlice12
Postmaster
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Reged: 05/22/12

Loc: Denver, CO
Re: High transparency after storm? new [Re: Tony Flanders]
      #5703296 - 02/27/13 11:14 AM

Here in Denver, it's usually the day or two AFTER a storm that the transparancy and seeing improve...unless another storm comes in...

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Puck Ja
scholastic sledgehammer
*****

Reged: 11/21/12

Loc: OK, USA
Re: High transparency after storm? new [Re: csrlice12]
      #5703363 - 02/27/13 11:55 AM Attachment (6 downloads)

Thanks for the report. This water absorption (the lack of it) "dark belt" still exist today. Unfortunately, my locate (OK) has been out of it. People in northern TX area may have a great night according to this image?

Here is today image:


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GlennLeDrew
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Reged: 06/18/08

Loc: Ottawa, Ontario, Canada
Re: High transparency after storm? [Re: Puck Ja]
      #5703381 - 02/27/13 12:03 PM

This is the 'dry slot' which typically follows close behind a cold front. My experience has it that the initial clearing behind a cold front almost always results in the best transparency. Once a day or thereabouts has passed the sky tends to worsen, although the trend is for better seeing (steadiness.)

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Puck Ja
scholastic sledgehammer
*****

Reged: 11/21/12

Loc: OK, USA
Re: High transparency after storm? new [Re: GlennLeDrew]
      #5704475 - 02/27/13 10:51 PM Attachment (5 downloads)

Glenn:

Thanks for the sharing. Now I learned what that was called. I took a quick peek tonight right before moon coming up and the transparency was good!

The dry slot now moved back to OK.


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