Re: ISS Magnitude, Atlas 5 Fairing

From: Art Glick (omb00900@mail.wvnet.edu)
Date: Sun Jul 20 2003 - 16:48:38 EDT

  • Next message: Tom Wagner: "Re: ISS Magnitude, Atlas 5 Fairing"

    Like most of you, I have also noticed significant differences between the 
    magnitudes reported by H-A and those that I've observed.
    
    After years of depending on H-A, I just downloaded Mike McCants' Quicksat, 
    and I want to take the opportunity to thank Mike publicly for making this 
    code available in the public domain.  As an old DOShead myself, Mike, I can 
    tell you that the elegant simplicity of your code is much appreciated.
    
    To all the rest of you still using H-A exclusively (it's good "in a 
    pinch"), I downloaded Mike's program for two reasons.  First, no matter how 
    I try, I can't "fool" H-A to display past Mag 5.  You can change the last 
    part of the URL all you want, but typing anything in over Mag 5 still 
    results in no more than that.  Here in the mountains of West Virginia we 
    can get down to Mag 6 (1X that is!) easily on a good night.
    
    Besides, if H-A is going to routinely underestimate magnitudes anyway, 
    they're going to leave out a bunch of stuff that I might be able to see.  I 
    especially enjoy the multiples e.g. NOSS, which are often right in that range.
    
    As for magnitudes, and those of you that have noted the discrepancies re: 
    ISS, you should know that Quicksat (with the accompanying quicksat.mag) is 
    much more accurate, too.  On two ISS passes tonight, H-A lists the mags as 
    0.6 and 1.4, as compared to Mike's -1.3 and -0.4 respectively.  From 
    experience, we all know who's more accurate, don't we?
    
    By the way, the second (and main) reason that I downloaded Quicksat was so 
    that I could add TLE's that are posted in this list to my predictions.  H-A 
    doesn't add them as quickly, and Mike couldn't have made them easier to add 
    to Quicksat (unless you don't know how to use Wordpad or an equivalent!).
    
    I was interested in seeing parts of the recent Atlas 5 that was 
    launched.  It had an awfully large fairing around the upper stage.  I 
    didn't even know if anything that big would make it to orbit, but I knew 
    that it wouldn't last too long, and that I wouldn't have much of a chance 
    of seeing without using TLE's posted to this list.
    
    I saw two items listed here (27852 & 27853), but alas, no passes at my 
    location.
    
    Thanks, Mike, for making it possible to check!
    
    Best Regards,
    
    Art
    
    
    
    Almost Heaven Group
    HC 67  Box 539 BB
    Renick  WV  24966
    Phone 304-497-2610
    Fax 304-497-2698
    e-mail   art@almostheaven.net
    http://www.almostheaven.net/
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