• Thank you for visiting the Cafe Rad Lab Forum
  • We present & discuss radiation health, science & news
  • To keep you informed about vital nuke information.
Hello There, Guest! Login Register


Thread Rating:
  • 1 Vote(s) - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Gamma on Cam
#1
[Image: 07-26%20212534%20spark%20cam4_zpsmg7mdz2p.png]

I record the two TEPCO live feed cameras, Cam1 and Cam4 in real time.  As I would go thru the recordings I noticed these small bursts of light lasting a single frame, which made them easy to separate from other light effects.  There has been a marked increase in sparks and more smoke/Fuku fog/steam emission events were documented when they increased.  Very few are watching the TEPCO cameras; popular timelapse videos remove most lightening strikes and sparks, so no one was seeing these events.  Watching in real time it looks like the twinkle of a star in the black background.  The recordings allowed me to step thru a recording and output frames for posting so others could see too.  As I grabbed frames I started noticing a timing pattern and got serious about trying to count these things while they were firing off so frequently.   Cam1 is the closest to the reactors and shows the most sparks.   Cam4 is much further away but still shows an occasional spark. The TBS/JNN cam is even further away and hasn't shown any sparking yet, but it does show the smoke/Fuku fog/steam events at the site.  Each frame grab has a timestamp so anyone could go thru a recording and verify the data.  The gamma spark grabs are posted in albums at HorseCam
 
I scan a recording at 1.5x speed, grabbing frames with sparks, naming them with the date, time, and a description.  I probably miss a few at that speed but three hours of recording to get a good average can take easily twice that to grab the sparks.  The graphs were made by piping out the directory to a text file and importing that into excel.  I calculate the time difference from one spark to the next.  In the graph, the horizontal is the spark count.  The vertical is the delay time between sparks.  The spark albums are best viewed in filename order to preserve the time sequence.  You can see the different types and colors of the sparks.  Watch for the light flaring on the right side of the screen over the r3 pit, where I suspect the radiologic event to be occurring.  Did you notice the variety of sparks?  Do you think sparks might be something other than gamma bursts? 
 
As to how I source these to gamma radiation, the effect on CCD cameras has been seen in several videos showing the inside of reactors.  Dr Goodheart has some examples at Agreenroad .  The Live_ISS_Stream camera shows gamma storms up there produce the same spark show on the HD CCD cams they use.  Look for them in the black of the night time part of the orbit when increased solar emissions are reaching earth.  Gamma fireworks belong in space, not sitting on a coastline.
 
ISS live feed - 3 min recording at start of a gamma storm.
https://www.dropbox.com/s/q2g3dgdraiv45h1/ISS%20gamma%20storm%203.flv?dl=0
 
ISS live feed - 30 screen grabs of random gamma.  http://s87.photobucket.com/user/HorseCam/library/ISS%20gamma%20storm
 
Twinkle, twinkle little star… If the camera sparks are gamma bursts we might expect to find them during known radiation spikes.  Bo posted radiation readings, TY, showing spikes on 7-7, the event a few days ago and a spike on 5-15. 
http://fukuichi.mods.jp/?p=37&fname=p34.csv&cnt=300&update=%E6%9B%B4%E6%96%B0

Went spark fishing on the 5-15-2015 recording and found 112 sparks amid multiple emission events. 

 
Start of 05-15 sequence, use left arrow to advance. 
http://i87.photobucket.com/albums/k146/HorseCam/05-15%20202550_zpsl416ld0j.png

End of sequence 05-16, use right arrow. 
http://i87.photobucket.com/albums/k146/HorseCam/05-16%20010329%20sprk%20yel_zpsa99euuma.png

A few are out of time order.  Notice the smoke/Fuku fog/steam over the r3 pit as it flares a few times to fill the screen.  Lots of color and combo sparks.  Sparks were dimmed by the smoke. 


There’s a slide show of the 5-15 steam/smoke event in my dropbox that has more sparks and is in chronological order to show off the eruptions of steam/smoke.  A gamma sparks perspective on the emissions questions. 
https://www.dropbox.com/s/0b7z4afykhe2pvg/5-15-2015%20Spike.ppsx?dl=0

The timelapse archive 5-15-2015 had 204 views.  I saw one spark at 0:51 near the tower. 
https://www.youtube.com/watch?v=JKhpwUsxsTg


Uploaded more sparks to the 7-7-2015 album.  http://s87.photobucket.com/user/HorseCam/library/7-7-2015
Graphed the time data and saw the same pattern as in the 5-15 time data; a few bursts over minutes, a long pause of about 40 minutes, more bursts over minutes, and another long pause, quite regular in both the measured timeframes.  The sparks indicate gamma activity occurring in a regular pattern during both radiation events.  
 

[attachment=16]

 7-16-2015 Sunset to Dawn
The weather had started to clear a bit during the day.  I was looking for when the sparks might decrease or disappear in clear weather, but we haven't had much clear weather the last few weeks, too much smoke and Fuku steam/fog to see anything but new colors in the sunrise/sunset.  At sunset another eruption of yellow smoke clouded the view.  I can't pinpoint where the smoke originates. There are sparks in the yellow/orange smoke.  The smoke cleared quickly this time and the sparks put on a strong show until after midnight when they slowed to a different rate till dawn’s early light ends the show. 

http://s87.photobucket.com/user/HorseCam/library/07-16-2015

The graph of the delay time between sparks shows a step change in the rate to a slower frequency.  The sparking doesn’t end by dawn and probably continues unseen in the daylight. 

http://i87.photobucket.com/albums/k146/HorseCam/07-16-2015/GAMMA%20SPARKS%20%20170%20%20%207-16-2015%201900-0400_zpsdejrqzdm.png

Majia posts a hypothesis quoted here to save me the time typing.

Quote: I've been a bit discouraged by the escalating signs of trouble in the Pacific and in Japan, which is becoming more fascistic daily. Webcam images haven't looked stable for months.
What hypotheses can we forward?
H1: Melted nuclear fuel at Daiichi is experiencing ongoing water-mediated sub-criticalities (sub-criticalities are not capable of producing an explosive chain. Geometry may explain).
Evidence:
Empirical evidence of Iodine-131 detections in dry sewage sludge. (TEPCO data courtesy of Fukushima Diary and Optimal Prediction).
Assertion by TEPCO that they cannot find the melted corium from reactor 1 (all over the news).
Webcam evidence of episodic, pulsating events at the plant whose precise nature is not clear but appear as "emissions" from buildings, strange fogs, eclipsing lights, patterned pulses of "sparks," wavering and/or pixilated imagery.
Clear evidence of severe ongoing fresh and sea water contamination with levels rising rather than falling. (TEPCO data)
No single piece of evidence stands alone to support the hypothesis but as a whole they provide persuasive circumstantial evidence for the hypothesis.
Are there data points that dis-confirm the hypothesis, other than TEPCO's fraudulent assertion of cold shutdown in November 2011?
I personally don't trust any of TEPCO's automated plant readings.
Other hypothesis that supplement or compete?
I don't think the ice wall can explain all the strange emissions since the emissions have been documented in screenshots and cams for years and the ice wall is newer (2014 I think).


I suspect sub-criticalities in the melts as well. I would add possible zirc fires in the CSFP to the list. I think the last few months events are more than just incinerating debris onsite. 


7-21 Sample of smoke clearing during regular hourly breaks and an hour and 15 minute sample of sparking.
http://s87.photobucket.com/user/HorseCam/library/07-21-2015%20smoke

Cleared during the day, evening spark activity was increased.
http://s87.photobucket.com/user/HorseCam/library/07-22-2015

7-22 spark activity graph dusk to midnight
http://i87.photobucket.com/albums/k146/HorseCam/07-22-2015/07-22%20graph_zpsdpccqxos.png

 
Quote:bo
July 24, 2015 at 9:48 am
Via @akira_pt4ever

'Unit 3 reactor containment monitor spiking same time as the steam/fog/black smoke seen on webcam.
If this wasn't criticality what is?'

http://fukuichi.mods.jp/show_graph.php?fname=p34.csv&cnt=100&p=37&vmode=mobile

This monitor had spiked 7 times this month
 
Quote: Horse
July 24, 2015 at 9:29 pm
TY, Bo, for posting the recent graph of U3. It seems the smoking and sparking seen lately could be a sub-criticality becoming more active. I think a melt has jumped to a more active level. I keep seeing sparks. Keep posting those graphs.

[attachment=19]

8-1-2015
“TEPCO successfully removed the fuel handling crane from the spent fuel pool on August 2nd amid problems with fog.”
http://www.fukuleaks.org/web/?p=14930

“It originally weighs 35 t, so Tepco cut it into 20 t piece in the pool water.
Two large cranes were remotely operated to remove this debris. In case of oil leakage from the debris, they stopped the coolant system of SFP 3 (Spent Fuel Pool of Reactor 3) for 12 hours.”

http://fukushima-diary.com/2015/08/tepco-completed-removing-20-t-debris-from-sfp-3/

Disturbing the contents of the R3 spent fuel pool while removing the large fuel handling crane could be the source of the increase in gamma sparks and the radiation spikes that occurred over the last two months.  While stations in Japan reported radiation spikes, TEPCO site readings on NETC did not change.  TEPCO is not telling us the true radioactivity at the site.  Gamma sparking went from peak rates of 30 per hour in June and July back down to an average 20 per hour.  From a count on August 1st it seems to be dropping below that 20 per hour average.  The gamma sparks in the recordings indicate that radiologic events are still happening; whatever the cause or whether they get reported or not. 

 
The fog may have provided cover for the other emissions web cam watchers noticed, it may even be heat from the pool steaming away that caused unusual thick fogging over the site.  CodeShutdown posted this reference on radioactive fog.
 
“Thus it is concluded that the presence of these radio-nuclides in atmospheric aerosols can increase their seeding capability and more fog can form in the atmosphere. Therefore the presence of radioactive aerosols is also one of the so many factors responsible for fog formation.” 6 Issue 14 Gohar Ali, E.U. Khan, N. Ali, H. A. Khan, A. Waheed http://www.pmd.gov.pk/rnd/rnd_files/vol7_issue14/1_The%20Effect%20of%20Radioactive%20Aerosols%20on%20Fog%20Formation_GoharAli.pdf
 
When TEPCO says the fog interfered with recent efforts, they would like you to believe it is just normal fog, but it was an increase in radioactive emissions as evidenced by the gamma spark counts that increased the fogging problem.  For the last three months the fogging grew so dense at times there was zero visibility on the TEPCO cameras.  Dense fog seen on one camera but not the other was not like the normal fog that usually affects both cameras the same.  The dense fogging coincided with peaks of 30 gamma sparks an hour.  The more gamma sparks, the more fog.  I was only counting 20 an hour on 8-1-2015. That has dropped down to about 15 an hour since the crane removal.
 
Quote:Horse
jec, while counting the sparks, I wondered if workers were getting an unexpected dose of gamma.  Sad to hear one reached his limit.  A count of 47 sparks in three hours on 8-2 for an avg. 15.66 sparks per hour.  Count seems to be steadily decreasing. 

Then another worker died.
http://fukushima-diary.com/2015/08/another-fukushima-worker-died-after-leaving-the-frozen-wall-area-tepco-the-cause-of-death-is-not-identified/

 
Conditions at the plant look to be deteriorating; plans and actions have been delayed again by years; the media, too silent on the dangers of the Fukushima nuclear disaster.  The explosions that made headlines four years ago were fixed by ignoring the problems that followed.  Increasing radiation at the site may lead to abandonment or halt the feeble efforts TEPCO/Japan has made so far.  Their efforts haven’t stopped the radiation spewing to air and sea.  Nuclear fuel still sits in pools near broken reactors too radioactive for men or equipment.  They tiptoe away from the problem trying not to waken the sleeping masses.
 
The reason I bring these little gamma bursts to your attention is that they are occurring more often than last year, when the phenomena was hardly noticed. 

[attachment=17]
"The map is not the territory that it is a map of ... the word is not the thing being referred to."
 
Reply
#2
Reactor 3 PCV equipment hatch investigation 9/9/2015  https://www.youtube.com/watch?v=jzAdZFU8N_c
   
Pia
just pm me if needed.
 
Reply
#3
[Image: ISS%20spark%2025_zpsjz5tnq8n.png]

[Image: ISS%20spark%2019_zpsxyyuilan.png]


These are pics of ISS live feeds that show the same characteristics of the tepcam sparks. A blogger in the ISS chat called them a gamma storm. Maybe different particles have different color or size. Comparing the tepcam sparks and the ISS gamma storm, I see many of the same shapes and colors.
"The map is not the territory that it is a map of ... the word is not the thing being referred to."
 
Reply
#4
[Image: 02-27%20r1%20053230%20green%20flash_zpsw0vav2nu.png]

califnative
February 27, 2015 at 10:58 pm
Wanted to add I was looking through FD 3 minute videos and captured this interesting pic. 2-27-15 05.23.00am JST cam4 looks like there is a red flare at the top of R4 corner, then at 05.32.20 a streak of white light shot by and captured it as neon green directed at the R4. What the heck was that?
http://postimg.org/image/40d11z0uh/
http://postimg.org/image/8nz6r5b6z/
http://postimg.org/image/q1g8fl167/

Horse
February 28, 2015 at 4:22 pm
Califnative, Great capture, green flare only lasted one frame so it was quick. Not sure what it was, lens flare lasts as long as the light source shines on the lens. Here's another pic of the event on 02-27 05:32:30 r1 cam.
http://i87.photobucket.com/albums/k146/H...vav2nu.png

Horse
February 28, 2015 at 9:07 pm
Califnative found a green flash in the timelapse, a remarkable capture. When I reviewed the recording it didn't look like the usual lens flare on that camera. The green and purple flash only lasted one frame so it was quick. I haven't noticed anything like it on that cam before. Maybe some help analyzing 'cause I'm not sure what it was. Here's the frame grab of the flash 02-27 05:32:30 r1 cam.
http://i87.photobucket.com/albums/k146/H...vav2nu.png

califnative
February 28, 2015 at 10:47 pm
Horse – yes, it was difficult to catch wasn't it and you caught it at 10 seconds later, great! I originally was looking at that area of interest and saw the red flare (also in your picture) at the top of R4 http://postimg.org/image/40d11z0uh/ then saw the white streak of light shooting out of the sky from the left which I agree is remarkable, the question is where did it come from.
Might I add Fukushima Diary posted on the same day that a leakage detector went off at 11:19 of 2/27/2015.
http://fukushima-diary.com/2015/02/13440...ted-water/
Here is FD's 2015.02.27_03.00-06.00.TimeLapse short video, starts around 05:23:00.
https://www.youtube.com/watch?v=-hEshHElqcA
It would be great to find the long version if there is one somewhere.
I magnified your green flash at 05:32:30, though pixelated the colors are bright.
http://postimg.org/image/c9kp44l97/
http://postimg.org/image/6iz4452mz/
http://postimg.org/image/wc26xvd89/ (10 seconds earlier)

Horse
March 1, 2015 at 6:16 am
Califnative, TY, On my recording it was just the one flash that lasted the one frame. The clock on the timelapse would be misleading. A clip from my recording wouldn't show any movement up or down, it flashed as seen in the frame grab, gone in the next.
AirSepTech has identified orbs but then if it was reflected light, it didn't last like a web does, webs last a few frames.
When reviewing the recordings, I've noticed white specks that last a single frame. One I caught on the top of the screen had a small rainbow effect. I can step thru the frames to take screen grabs. The green flash lasts just one frame like the white specks but is much larger. No pet theory yet on what it is.

http://enenews.com/forum-fukushima-webca...nt-page-81
"The map is not the territory that it is a map of ... the word is not the thing being referred to."
 
Reply
#5
Here's a few early grabs of sparks posted by an enenewser.  I think it was CalifNative or Chasaha that posted the links.  I thank whoever grabbed these and posted them.  

   

   

   

The 2012-06-29 grab of the double blue baddie spark shows the view of the early tepcam. Different angle and zoom than we get now. Notice the area of the bright light is no longer in the current cam1 or cam4 views. The sparks must have been flying to have been found in the two time lapse grabs.
"The map is not the territory that it is a map of ... the word is not the thing being referred to."
 
Reply
#6
Thanks go to Chasaha.  

Quote:ChasAha
June 29, 2012 at 2:00 pm
Captured BIG BLUE Spark. Check this out.
I started watching the above video at about 15:30 in.
"Wow", I thought.
Then, I saw a BIG blue spark toward the end.
What is it? Any thoughts?
Screen Shot:
https://dl.dropbox.com/u/2099954/Rad%20S...%20003.JPG
Blue Sparkly:
Tepco Web Cam time 2012-06-29 20:59:59
Video Time – @29:52
Pg 83
http://enenews.com/forum-fukushima-webca...nt-page-83

The double blue spark was in this time lapse video at about 15:30 in:  
2012.06.29 20:00-21:00 / ふくいちライブカメラ(long ver)

Spark fishing in the time lapse yielded lots of sparks in the emissions. Here's three more spark grabs from that time lapse.  

   

   

   
"The map is not the territory that it is a map of ... the word is not the thing being referred to."
 
Reply
#7
This is a speed-up video --- but even so the lower right corner white light and (end of video) lower left corner purple light are unusual.
http://youtu.be/GTwNQhbs2uA

(10-18-2015, 11:41 PM)missFrill Wrote: This is a speed-up video --- but even so the lower right corner white light and (end of video) lower left corner purple light are unusual.
http://youtu.be/GTwNQhbs2uA

. . .  and for viewers who don't know my earlier cam watching there's more from this fall on this thread (created when ENE-News had technical problems with their live cam forum):
http://fukushimahounds.freeforums.net/th...ment-forum
 
Reply
#8
Thanks for jumping in with more observations!
Pia
just pm me if needed.
 
Reply
#9
(10-18-2015, 11:41 PM)missFrill Wrote: This is a speed-up video --- but even so the lower right corner white light and (end of video) lower left corner purple light are unusual.
http://youtu.be/GTwNQhbs2uA

(10-18-2015, 11:41 PM)missFrill Wrote: This is a speed-up video --- but even so the lower right corner white light and (end of video) lower left corner purple light are unusual.
http://youtu.be/GTwNQhbs2uA

. . .  and for viewers who don't know my earlier cam watching there's more from this fall on this thread (created when ENE-News had technical problems with their live cam forum):
http://fukushimahounds.freeforums.net/th...ment-forum

Hi missFrill, good pictures on your replacement thread and good info on the rest of the Hounds forum.  I don't think tepco liked our documenting their coverup, ugh cleanup.  Now the flowplayer change to the camera feeds.  The enenews webcam forum falling apart came at a bad time, just when things were happening on the cams.  Welcome to the Café Rad Lab, still trying to document the problems with current nuclear technologies despite the industry's whitewash job.  

Not much happening on the tepcams lately, saw the comment "This 'live cam' appears to me to show a still photograph".  Less detail for us to nitpick tepco with and if they drop something cleaning up r1 we might not see much.  Yes, we do have the time lapse.  Those are great for showing the crane activity and the daily weather but they tend to run short when something happens.  I don't worry too much about the sun glare on cam1 in the morning.  Links to the time lapse videos are useful, I look at them to save time.  No way can I watch all the recordings and I sometimes wonder how much doesn't get noticed 'cause watching cams is pretty boring for the most part.  I think we'll still have plenty to document soon enough.  You were often the first warning of unusual events so more of us could see, thanks for all your hard work, hope to see you post observations here more often.
"The map is not the territory that it is a map of ... the word is not the thing being referred to."
 
Reply
#10
a great compilation by nuckelchen.blog.de

http://youtu.be/i58Dt5oo8sk
 
Reply
#11
livestream on two players

http://youtu.be/hiJeK695gDU
 
Reply
#12
yeah, and the point of it was that the right sided player "GOM" was the favorite used player in japan.
SO NO WONDER WHY THE GOM PLAYER DIDN'T SHOWED  ANY RAYS.

that one wasn't bad too:



 
Reply
#13
some more "stars and stripes" from 2011, 31th of october:










and here we got a mix of rays and bugs from one night that ended into a doubble-woubble picture of the plant on the morning:



 
Reply
#14
Hi Folks - haven't had a chance to post here for a while but I've been watching. Hi Horse, thanks for pointing out the pink steamy clouds earlier, I think the Fuku Plant atmosphere so just saturated with heavy emissions (no doubt) and the pink, green spaying is going on all the time. Those black specs that float around off and on during the day and night since FlowPlayer started seem to be enhancing the heavy vapors into what looks like oily black specs is my conclusion. When you slow down the speed the bugs and birds are apparent. Heavy pixations distort into cube like cloud formations adding to bizarre webcam views. And to think I used to complain before FlowPlayer was introduced.

Nuck, great vids, thanks for posting spark close ups and the colorful Screen Blips!
https://www.youtube.com/watch?v=i58Dt5oo8sk  some really wild sparks in here.
Been wanted to re-post this pic I caught from one of your vids Nuck, a camouflaged military vehicle driving towards Fuku Plant.
http://postimg.org/image/ks7aps8yl/ (closer view)
Taken 4-11-15 around 12:00AM
   

Your right Horse, I do have an artistic side and I crave COLOR when watching the webcams. As you know, I ZOOM IN on the active areas, that is one thing FlowPlayer is capable of, enhancing the colors of HOT SPOTS.  
1-22-16 there was a boat light flashing on cam1 horizon all night long, caught the colors of it at Dawn. What is this thing?
   
   
Then after the light stopped, daylight showed two boats sailing away from view.
1-23-16 at 6:45am
   

So R4 extension room corner is a HOT SPOT for sure. Pic on 1-20-16 at 7:17am, tilting your monitor screen shows the color contrast better.
   

Then tepco tried to hide the hot spot with the old "crane cover up" trick, I think they sprayed inside the room using the emission reduction spray which you can see along the edges. 1-24-16 at 11:14am.
   

Green spark during the flashing boat light 1-23-16
   

And one more pic during that stormy night with all the rain, sleet, arching, sparking on 1-23-16 at 17:55pm.
   

 
Reply
#15
Lightbulb 
Something that may or may not be of historical note.

I don't daily observe like I used to, but it seems  that my recollection of wild lightning storms over the first couple of years was more extreme then, than it has been lately.   Meaning, lots of weird cloud lightning colors.  
(2011-2013)

Nuckelchen and others took some good shots of  blue, orange and purple-like lightning and full sky "light ups".

Wink Right Click to view the full screenshot of the attachment.


Attached Files Image(s)
   
 
Reply
#16
(01-28-2016, 10:48 PM)Chasaha Wrote: Something that may or may not be of historical note.

I don't daily observe like I used to, but it seems  that my recollection of wild lightning storms over the first couple of years was more extreme then, than it has been lately.   Meaning, lots of weird cloud lightning colors.  
(2011-2013)

Nuckelchen and others took some good shots of  blue, orange and purple-like lightning and full sky "light ups".

Wink  Right Click to view the full screenshot of the attachment.

Chasaha, I agree that electrical storms were more intense than they are now.  I think the large radioactive emissions turned the area into a radioactive cathode that provided a strong path to ground relative to the surrounding regions.  Two things have occurred with the passage of time. The air emissions are half what they were because the spent fuel has had time to cool down thermally and workers can maintain the chemistry of the pools better than in the early days.  The plume of radioactive noble gases has mixed into the atmosphere of the northern hemisphere increasing the conductivity of the air mass over a larger area while eating a bigger hole in the polar ozone layer.  

Other radionuclides now fallout with every rain or snow to contaminate the land.  The tritium releases will continue to flow to the sea to kill aquatic life.  Contaminated sea spray will fill the air in coastal regions.  The three corium melts leaching radiation into the water will bio-accumulate up the food chain in any creature that relies on ocean produce.  

Ionizing radiation is invisible to our senses but the effects on life and our environment becomes ever more apparent.
"The map is not the territory that it is a map of ... the word is not the thing being referred to."
 
Reply
#17
I am in agreement also re: electrical storms. First few years after there was a lot of amped up lightning I witnessed in several different regions - whenever I brought up the topic, people agreed it was more intense than usual. So far, this year in Uruguay, not as bad as last year. Much briefer, and wind not so punishing.
Pia
just pm me if needed.
 
Reply
#18
here are a bundle of some lightnings:
kraftzwerk

and here we got some older captures:



 
Reply
#19
Arto Lauri has a helpful video showing vacuum chemistry and he explains spark colors with home experiments.
He has improved his translation system so his videos are easier to understand.
http://youtu.be/O08ih0tL-OU

(lots more on his channel)
 
Reply
#20
Hey Horse,

Great work identifying and documenting the occurrences over time. I had a thought on how you might be able to VERY ROUGHLY quantify what is being captured.

https://www.youtube.com/watch?v=aR--2dASoJA
The video here was from one of the camera probes going into the primary containment in R2. Early in the video there are a great number of frames inside the PCV that are nearly completely black (in photon light), but show TONS of gamma making noise on the CCD. My take is this is the same effect you are documenting, just an extremely higher radiation field.

Here is my idea on how you could ROUGHLY of determine activity on the webcams.

Start by grabbing a bunch of frames from the video above. For each frame, count the noise spots and average out the number per frame. For a quick reference, I counted 67 dots in one quarter of a frame, so that's roughly 250 noise dots per frame. The video description says readings were over 20mSv/hr. So lets assume 25mSv/hr (maybe more?). If we do a quick calculation, we'll figure out a ration for number of frame dots per mSv. ~250 dots divided by 25mSv= 10. So roughly 10 dots in a frame is 1mSv. Then we'll determine what 1 dot in a frame is about .1mSv. Ok, but we need to figure out one last thing and that is the time interval. In the video above, we are seeing ~250 (again rough estimation on my part) per frame. We'll assume 30 frames per second recording, which means every second there would be about 7500 noise dots we could count. 7500 dots per second = ROUGHLY 25mSv/hr. Now, lets get the time base he same. For this, I'm going to go with seconds, so we want to convert 25mSv/hr to mSv/s. There are 3600 seconds in an hour, so we divide 25/3600 = 0.006944mSv/s
Now we know all of these values are equivalent:
7500 dots per second = 250 dots frame = 25mSv/hr = 0.006944mSv/s = 6.944uSv/[b]s

[/b]With these numbers in mind, you could determine activity by counting the number of frames or seconds between each dot you find on the webcam feed. Lets just go with one more example to determine a scenario of activity on the web cam. If we witness a dot on the frame every 3 seconds (this would be calculated from averaging), we'll convert 30FPS*3seconds = 90 frames, or the fraction 1/90 dots per frame. To convert that to mSv we do the following

1/90dpf dots per frame = .33 dots per second

we know 7500 dots per second = 25mSv/hr, so we set up the ratio 7500/25mSv = .33/.0011mSv/hr

.00111mSv/hr = 1.11uSv/hr or roughly 20x background

again, these were all rough calculations and estimations, but you could refine this process to get a better level of accuracy. Frame rates of the cameras is probably the biggest factor to throw off the calculated results. Other factors are unknown to us, so we just have to make some assumptions.

 
Reply
  


Possibly Related Threads...
Thread Author Replies Views Last Post
Video Gamma on Cam - Analysis RodgerRoentgen 7 4,311 04-19-2016, 02:28 PM
Last Post: RodgerRoentgen

Forum Jump:


Browsing: 1 Guest(s)