Incoming gamma radiation
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Author:  Bert490 [ Thu Mar 09, 2017 10:59 pm ]
Post subject:  Re: Incoming gamma radiation

I see that my detector photo below and initial results have a bad link. I just found how to attach rather than link images, so this one should be more reliable. the Lead sides and bottom are now 35 mm / 1.4" thick, and reduce the overall background by 32%, so anything from above should have been detectable.

File comment: Initial pass of Snap-10A with promising data but proven to be not related.
Snapshot-Sept-21-pm-76d.jpg [ 33.98 KiB | Viewed 28673 times ]
GM tube in box.jpg
GM tube in box.jpg [ 83.73 KiB | Viewed 28673 times ]

Author:  peter febbroriello [ Fri Mar 17, 2017 7:28 pm ]
Post subject:  Re: Incoming gamma radiation

Stay tuned...we have results.

Author:  peter febbroriello [ Mon Mar 20, 2017 5:22 am ]
Post subject:  Re: Incoming gamma radiation

IRID.JPG [ 78.55 KiB | Viewed 28597 times ]

Raw count summaries for Iridium fragments 34073,34356,34499 and 34498
December and July are being re-processed. These fragments have the highest counts for the available data set, and have been consistently on the top of the list. I will be attempting to produce clear graphics to show the contrasting levels for all fragments. Also, the data used only represents 1/3 of the total available data. the reminder of which has yet to be downloaded and processed.

Author:  peter febbroriello [ Tue Mar 21, 2017 5:06 am ]
Post subject:  Re: Incoming gamma radiation

Here are the graphics for February and March 2017 with the spreadsheet for the 4 hot fragments at the bottom. If you want graphics for the rest, please PM me.

march 2017 iridium spectrum.png
march 2017 iridium spectrum.png [ 2.86 KiB | Viewed 28587 times ]

bottom (x axis) norad numbers left side (y axis) total counts for March
iridium spectrum for February 2017.png
iridium spectrum for February 2017.png [ 3.01 KiB | Viewed 28587 times ]

File comment: updated Iridium results
IRIDIUM.JPG [ 74.16 KiB | Viewed 28587 times ]

Author:  peter febbroriello [ Sat Mar 25, 2017 6:06 am ]
Post subject:  Re: Incoming gamma radiation

The remaining 60% of Iridium33 Debris data has been processed and a few more hot fragments can be identified:
File comment: Spectrum of debris from Iridium 33
Norad numbers on bottom and total cpm on left axis.

spectrum Iridium33DEB.png
spectrum Iridium33DEB.png [ 3.14 KiB | Viewed 28554 times ]

Here is the chart showing March 2017 additions and updated data as of March 24:

CHART.JPG [ 272.01 KiB | Viewed 28554 times ]

Note the decay dates...something is not right. I tried to calculate the decay dates with bad results. I'm now wondering if the TLE data has been tampered with.

Author:  rbette1299 [ Mon Mar 27, 2017 12:25 am ]
Post subject:  Re: Incoming gamma radiation

Ok so this is my first post and so am probably doing it wrong. Member for 3 years just never posted. My question is what is happening with ALL of the EPA sites going inactive since March 23, 2017 and the last readings posted were much higher than normal?

Author:  peter febbroriello [ Tue Mar 28, 2017 5:25 am ]
Post subject:  Re: Incoming gamma radiation

The news media have been reporting the shutdown of the EPA and the gov. has ordered them to pull all projects and grants and shut down all data sources to the public. I'm still accessing some privately held data on orbits, but it now seems to have been "contaminated" making it impossible to estimate re-entry dates and locations. There are many more radioactive sources in orbit that will be posted in my next report. It takes days to run the software on nearly 600 Iridium debris fragments to calculate what you see here. The results may indicate big trouble ahead. Or not.

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