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magnitude of flashing satellites

 
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Stefano Sposetti



登録日: 2009.01.22
記事: 4

記事日時: Mon Jun 15, 2009 2:07 am    記事の件名: magnitude of flashing satellites 引用付きで返信

I detected several flashing_satellites with my all-sky camera and UFOCapture.
http://web.ticino.com/sposetti/html/all_sky.html
Most flashes lasts from 5 to 30 frames (i.e. 0.2s to 1.2s).
The flashes are pointlike, and they show no movement .

I want to evaluate the magnitude of those flashes. I tried with UFOAnalyzer V2.25.
This software calibrated correctly the positions and the magnitude of the stars in the field with the stars in the database. ("analyze" ,"adjust" , "link" and "auto link" commands).
But I cannot measure the magnitude of the satellite_flash. I tried to remove the "opt-mask" and tried to recognise the flash as a star but failed.
Can you tell me an easy way to calculate the magnitude of the satellite_flashes?

Best regards,
Stefano



sposetti.JPG
 説明:
I cannot evaluate the magnitude of the satellite_flash in the upper-right part of the image.
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sposetti.JPG


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記事日時: Mon Jun 15, 2009 9:03 am    記事の件名: Re: magnitude of flashing satellites 引用付きで返信

Stefano Sposetti wrote:
But I cannot measure the magnitude of the satellite_flash. I tried to remove the "opt-mask" and tried to recognise the flash as a star but failed.

I am not sure about what is happening on your clips.

It seems that no object was found by UA2.
The "__none" in the class column means no changing pixel was detected.
Object should be recognized before the magnitude measurement.
(Object will not be recognized as a star anyway).

There are many possibilities that cause it.
Firstly, try followings
1) push "del" in the Mask Editor sheet and delete the edited mask file (*N.bmp)
2) push "qm" and drag rectangle around the object.
3) set "ddl" = 2, "f1"= 10 in the "Profile/Analyze" sheet.
4) push "A" in the "Profile/Analyze"

It you cannot solve the problem by this, I need all clip files (*avi,*M.bmp, *A.XML ...) to advise more.
If you can use some file transfer service on the net, use it and let me get it.
If you cannot, I will prepare a temporal FTP account for you.
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