Re: Consecutive ISS passes

From: Bjoern Gimle (b_gimle@algonet.se)
Date: Thu Aug 02 2001 - 02:45:05 PDT

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With a current elset, adjusted to pass apogee at apex on midnight of summer
solstice, 7 passes are possible near latitude 35 degrees N or S. Sun would
be just on the horizon at that latitude for the first and last pass.
6 passes are possible for 5-6 consecutive nights.


6 passes higher than 17 degrees, with sun at -3 or lower, can be seen at
latitude 42 degrees:


From SkyMap for 35 deg N:
1/ 6/20 19:12:04 146 14  19:12:53 128 15  19:17:30  67  0   0.1 25544 ISS
max
1/ 6/20 20:43:38 243  0  20:48:46 322 38  20:53:58  42  0   0.4 25544 ISS
max
1/ 6/20 22:21:42 291  0  22:25:39 340  8  22:29:38  29  0   3.4 25544 ISS
max
1/ 6/21  0:00:22 327  0   0:03:19   1  3   0:06:16  35  0   3.7 25544 ISS
max
1/ 6/21  1:36:50 330  0   1:40:56  21  9   1:45:02  73  0   3.0 25544 ISS
max
1/ 6/21  3:12:30 317  0   3:17:44  39 47   3:22:56 121  0  -0.2 25544 ISS
max
1/ 6/21  4:49:09 290  0   4:51:32 268  8   4:51:32 268  8   0.8 25544 ISS
max

For 42 deg.N:
1/ 6/20 19:57:26 204  0  20:02:18 135 22  20:07:13  66  0  -0.4 25544 ISS
max
1/ 6/20 21:33:04 250  0  21:38:16 331 44  21:43:31  53  0  -0.1 25544 ISS
max
1/ 6/20 23:10:15 286  0  23:15:01 351 17  23:19:48  55  0   2.3 25544 ISS
max
1/ 6/21  0:47:16 306  0   0:52:05  11 17   0:56:53  77  0   2.1 25544 ISS
max
1/ 6/21  2:23:30 306  0   2:28:46  30 52   2:34:00 114  0  -0.5 25544 ISS
max
1/ 6/21  3:59:53 292  0   4:04:40 227 18   4:09:24 162  0  -0.2 25544 ISS
max

Allowing daylight, eight passes are possible, at around 33-36 deg. lat.
7 passes, all higher than 9 degrees, can occur at lat.39 degrees.

ISS max         40.0  0.0  0.0  0.5 d   72       397 x 381 km
1 25544E 98067A   01172.00000000  .00011683  00000-0  14964-3 0  2367
2 25544  51.5663 179.0000 0011969 270.0000 167.0000 15.59603035152440


-- bjorn.gimle@tietotech.se (office)                         --
-- b_gimle@algonet.se (home)  http://www.algonet.se/~b_gimle --
-- COSPAR 5919, MALMA,    59.2576 N, 18.6172 E, 23 m         --
-- COSPAR 5918, HAMMARBY, 59.2985 N, 18.1045 E, 44 m         --



> Steve Newcomb wrote:
> > What is the maximum number of consecutive passes viewable (at different
> > latitudes and not counting daytime, when that happens) and who has seen
the
> > most consecutive passes?
>
> Jay Respler:
> A few years ago I saw 5 passes of Mir in one night.
> (I didn't get much sleep that night)
>



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Next message: Ed Cannon: "Visiting observer plus a few obs"
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