Ir 14? & Ir 11 tum

Jim Nix (nixj@bellsouth.net)
Thu, 22 Oct 1998 16:00:54 -0500 

Hi all,

Some additional data on Iridium 14? and Iridium 11 tum and a question or
two for Rich, Ralph, Don or Bjorn.

Ir 14? 97030A Flash Data  From 10/22/98 UTC.

  1     Tape data:  00:10:31  first flash that caught my attention then
three
         more at 00:11:00, :05,:10.  These 4 very brilliant mag -1 to 1.

         (Period of 5.0s on last three.)

  2     For two min. no flashes 11:10 to 13:??, just 1.75s at mag 6.with

         invisible for .75 secs. Rotation 5s?

  3     Flashes of Mag 3.? to 4.? (stopwatch)
           00:13:05.55, 09.61, 14.50, 19.51, 24.37, 29.16, 34.07, 38.90,

           43.90,48.78 for 42.23/9 = 4.803 period

  4     Additional flashes (tape data) Mag 4.5? to 5.1? at:
00:14:04,06,09,12,14,16,21,28.

  5     Predicted Data (Satspy & Iridium.tle of 10/19/98)
           Time        RA      Dec  AZ    El      Range   %Illum    Mag
Sun Elev
         00:10:30  005300  3.4  98.8  18.0  1828.9   98.29    6.6
-11.6
         00:11:00  010632  9.6  91.6  18.9  1784.7   99.29    6.5
-11.7
         00:11:10  011124 11.7  89.0  19.1  1775.3   99.46    6.5
-11.76
         00:13:10  022528 34.6  59.4  17.2  1874.3   95.19    6.7
-12.16
         00:13:30  024030 37.5  55.2  16.2  1926.2   93.58    6.8
-12.2
         00:13:50  025608 40.2  51.2  15.2  1986.6   91.85    6.8
-12.24
         00:14:10  031215 42.5  47.5  14.1  2054.7   90.03    6.9
-12.36

Iridium 11 tum, Flash data

  1  5 degrees above Jupiter at 00:55:33, tumbling no flashes.
      00:56:06.78,12.65,18.87,25.06,31.09,36.71,42.65,48.88,54.65,
     58.40,00:57:06.59

     97030G 005706.59 98-10-22 JN 59.81" 10 5.981 r

  2     Tape data:  primary Flashes (no mag estimate):

         97030G 005759 98-10-22 JN 48" 8 6.0

  3     Primary and Secondary Flash pattern,   FffFffFffF
         Tape data: 00:59:04F, 07f, 9f, 10F, 12f, 14f, 15F, 17f, 19f,
20F
         97030G 00:59:20 98-10-22 JN 16" 3 5.3 F  primaries
        97030G 00:59:20 98-10-22 JN 16" 9 1.7 Ff combined
         97030G 00:59:20 98-10-22 JN 13" 5 2.6 f  secondaries

  4     Predicted Data Iridium 11 tum   Sun 9.5 degrees below Horizon
       Time         RA      Dec   AZ       El     Range   %Illum   Mag
Sun Elev
     00:56:30  233044  18.6  106.2  52.4  933.4    91.72   5.2    -21
     00:58:00  010106  54.2  45.7   44.8  1031.3   85.84   5.5    -21.3
     00:59:10  032118  67.5  26.2   30.4  1330.4   75.92   6.2    -21.53

     00:59:20  034426  68.2  24.6   28.6  1382.2   74.64   6.3    -21.56

Rich Keen Wrote

 "Here's the Iridflar output for my site:"
 "Ir   Date     Time     Az  El  Sun  Ant Flar   Vis Peak Stand"
        "         UT              elev     Angle  Mag  Mag  Mag"
 "14? 98-10-18 02:30:00  014 23 -25.2  L  0.18  -6.8 -7.0 -8.1"

 Is Iridflar a program?  How do you Calculate Flar Angle and what is
Ant?

Jim
35 18 58.88412N  89 53 10.5396W 100m