atmospheric extinction for low altitude flares

From: Tom Wagner (sciteach@mchsi.com)
Date: Wed Jun 16 2004 - 00:34:48 EDT

  • Next message: Ed Cannon: "Re: atmospheric extinction for low altitude flares T"

    I watched 3 Iridium flares tonight in the mosquito laden air. One was a -8,
    the other 2, -6 apiece. The magnitudes seemed accurate even down to the 13
    degrees altitude of the lowest one. It was a -6, was NNE and latest quite a
    bit longer than the others.
    
    Two questions:
    (1) Does H-A consider atmospheric extinction when making their flare
    magnitude predictions?
    (2) Does anyone know the lowest in the sky someone has observed an Iridium
    flare?
    
    Thnaks,
    
    Tom  Iowa  USA
    +   +   +
    
    ----- Original Message ----- 
    From: "Tom Wagner" <sciteach@mchsi.com>
    To: <SeeSat-L@satobs.org>
    Sent: Tuesday, June 15, 2004 10:32 PM
    Subject: Iridium flare light across a cloud?
    
    
    > I just saw a -8 Iridium flare at an elevation of 59 degrees toward the
    ENE.
    > It occurred through a high thin narrow cloud. About two seconds before the
    > maximum brightness I swear I saw its light sweep across the cloud. I
    cannot
    > say for certain which direction the light was moving but I think it was
    > going in the opposite direction of the moving satellite, which was moving
    > southward.
    >
    > Is it possible I saw the light sweep across the cloud before it "swept" by
    > me on the ground?
    >
    > Tom  Iowa  USA
    > Latitude: 42.473513              42 deg  28' 25"
    > Longitude: -92.360413          92 deg  21' 37"
    > Meters above sea level: 274
    > 6/15/04
    > Time zone: USA Central Daylight Time, GMT -5
    > Local Time: 22:05:06
    > Object altitude: 59 degrees  Direction ENE  of travel: South
    >
    > -------------------------------------------------------------------------
    > Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive:
    > http://www.satobs.org/seesat/seesatindex.html
    >
    
    -------------------------------------------------------------------------
    Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive:  
    http://www.satobs.org/seesat/seesatindex.html
    



    This archive was generated by hypermail 2b29 : Wed Jun 16 2004 - 00:42:52 EDT