I believe 5 passes can be observed in 6 hours 30 minutes .... unless you have
some other definition of a pass... than seeing a satellite pass overhead.
I have seen 4 consecutive ISS passes ( last year). One of my friends here in
Edmonton Alberta saw 5 consecutive passes in June of this year.
This summer we had two occasions to see 5 passes. Times for both passes are
listed below. The ISS is bright enough to be seen when the Sun is more only 3°
below the horizon. I have seen it more than once with the Sun very little more
than the minimum negative elevation.
Solar Elevation at 22:23 July 25 = -5.5°
Solar elevation at 04:51 July 26 = -6.3°
If I place my location as 387 km above the Earth at Lat 51.6374° at solar
midnight at 01:34 July 26 the Sun is still 52 arc-minutes above the horizon.
Sure makes for a fainter and red tinted ISS.
Larry Wood
W 113.565 N 53.558
==================================
Element File: Latest.tle
Tracking Station: Edmonton,AB
Visibility Mode: Optical
Satellite: ISS
Local
Date Time Elev Azim Range Lat Long Alt Dopp Dopp Phz
Sqt V
MM/DD/YY HH:MM:SS Deg Deg Km Deg Deg Km Up Down 256 Ang
-- Rev # 21011 --
07/25/02 22:23:00 6.1 176.1 1675 39.3 -112.3 387 -1487 -4492 10 -1 Y
07/25/02 22:24:00 8.9 161.8 1476 41.5 -108.3 387 -1680 -5074 12 -1 Y
07/25/02 22:25:00 10.3 144.2 1385 43.7 -104.1 388 -1866 -5635 15 -1 Y
07/25/02 22:26:00 9.7 125.9 1424 45.6 -99.6 389 -2044 -6173 18 -1 Y
07/25/02 22:27:00 7.4 110.0 1583 47.3 -94.8 389 -2214 -6685 21 -1 Y
-- Rev # 21012 --
07/25/02 23:57:00 5.8 230.3 1706 43.1 -128.8 388 -448 -1353 14 -1 Y
07/25/02 23:58:00 11.5 224.3 1319 45.1 -124.4 389 -617 -1864 17 -1 Y
07/25/02 23:59:00 19.7 213.0 968 46.8 -119.6 389 -784 -2368 20 -1 Y
07/25/02 00:00:00 30.7 188.0 708 48.4 -114.6 390 -948 -2862 22 -1 Y
07/26/02 00:01:00 33.7 143.5 662 49.7 -109.2 390 -1108 -3345 25 -1 Y
07/26/02 00:02:00 23.5 110.9 863 50.7 -103.6 391 -1263 -3815 28 -1 Y
07/26/02 00:03:00 14.1 96.2 1192 51.4 -97.7 391 -1414 -4269 31 -1 Y
07/26/02 00:04:00 7.7 88.8 1570 51.7 -91.8 391 -1558 -4706 34 -1 Y
-- Rev # 21013 --
07/26/02 01:33:00 7.2 260.5 1598 49.3 -134.2 390 433 1309 24 -1 Y
07/26/02 01:34:00 14.1 257.9 1192 50.4 -128.7 390 292 880 27 -1 Y
07/26/02 01:35:00 25.8 251.9 808 51.2 -122.9 391 148 447 30 -1 Y
07/26/02 01:36:00 49.4 230.0 504 51.7 -116.9 391 4 11 33 -1 Y
07/26/02 01:37:00 54.4 135.8 474 51.8 -110.9 392 -142 -427 35 -1 Y
07/26/02 01:38:00 28.5 106.4 752 51.6 -104.9 392 -287 -866 38 -1 Y
07/26/02 01:39:00 15.6 99.5 1129 51.1 -98.9 392 -431 -1303 41 -1 Y
07/26/02 01:40:00 8.2 96.5 1533 50.2 -93.2 392 -575 -1737 44 -1 Y
-- Rev # 21014 --
07/26/02 03:09:00 7.0 272.0 1621 51.8 -136.0 392 1364 4119 34 -1 Y
07/26/02 03:10:00 13.4 266.4 1230 51.7 -130.0 392 1233 3724 37 -1 Y
07/26/02 03:11:00 23.1 254.9 875 51.2 -124.0 392 1096 3311 40 -1 Y
07/26/02 03:12:00 36.9 225.9 622 50.5 -118.2 392 954 2882 43 -1 Y
07/26/02 03:13:00 37.5 172.5 615 49.4 -112.7 392 807 2438 45 -1 Y
07/26/02 03:14:00 23.7 142.1 860 48.1 -107.4 392 656 1980 48 -1 Y
07/26/02 03:15:00 13.8 130.2 1213 46.5 -102.4 392 500 1510 51 -1 Y
07/26/02 03:16:00 7.3 124.4 1602 44.6 -97.7 392 341 1030 54 -1 Y
-- Rev # 21015 --
07/26/02 04:46:00 8.4 254.5 1520 48.5 -132.3 392 1994 6021 47 -1 Y
07/26/02 04:47:00 11.8 238.6 1314 46.9 -127.2 392 1849 5584 50 -1 Y
07/26/02 04:48:00 13.4 218.5 1229 45.2 -122.5 392 1696 5121 53 -1 Y
07/26/02 04:49:00 12.2 198.0 1290 43.2 -118.0 392 1534 4633 56 -1 Y
07/26/02 04:50:00 9.0 181.4 1478 41.0 -113.9 392 1365 4121 58 -1 Y
07/26/02 04:51:00 5.3 169.5 1753 38.7 -110.0 392 1188 3587 61 -1 Y
The earlier date of 5 passes was as follows:
-- Rev # 20074 --
05/26/02 22:31:29 7.5 176.1 1575 40.2 -112.3 389 -1481 -4473 205 -1 Y
05/26/02 22:33:00 11.3 151.4 1337 43.4 -106.2 390 -1763 -5325 209 -1 Y
05/26/02 22:34:29 10.4 122.7 1386 46.3 -99.3 390 -2029 -6127 213 -1 Y
05/26/02 22:36:00 5.9 100.9 1698 48.6 -91.8 390 -2275 -6872 217 -1 Y
-- Rev # 20075 --
05/27/02 00:06:00 9.8 229.2 1421 44.9 -126.3 390 -512 -1546 211 -1 Y
05/27/02 00:07:29 22.5 212.9 886 47.5 -119.1 390 -759 -2293 215 -1 Y
05/27/02 00:09:00 37.0 158.8 617 49.6 -111.2 390 -1000 -3020 219 -1 Y
05/27/02 00:10:29 22.0 106.2 901 51.0 -102.7 390 -1232 -3721 223 -1 Y
05/27/02 00:12:00 9.6 90.5 1440 51.7 -93.8 390 -1453 -4388 228 -1 Y
-- Rev # 20076 --
05/27/02 01:42:00 11.9 260.2 1305 50.4 -130.4 390 392 1185 221 -1 Y
05/27/02 01:43:29 29.5 251.0 730 51.5 -121.7 390 179 540 225 -1 Y
05/27/02 01:45:00 61.4 162.7 440 51.8 -112.6 390 -38 -114 229 -1 Y
05/27/02 01:46:29 24.8 105.4 829 51.4 -103.6 390 -255 -771 234 -1 Y
05/27/02 01:48:00 9.9 98.4 1417 50.2 -94.9 389 -473 -1427 238 -1 Y
-- Rev # 20077 --
05/27/02 03:18:00 11.4 267.9 1329 51.7 -131.5 390 1321 3989 231 -1 Y
05/27/02 03:19:29 25.6 248.8 809 50.9 -122.7 389 1116 3369 235 -1 Y
05/27/02 03:21:00 37.3 186.4 612 49.4 -114.2 389 897 2710 240 -1 Y
05/27/02 03:22:29 19.8 141.0 964 47.3 -106.4 388 668 2018 244 -1 Y
05/27/02 03:24:00 8.2 127.9 1521 44.6 -99.2 388 430 1299 248 -1 Y
-- Rev # 20078 --
05/27/02 04:54:00 7.1 256.2 1606 48.4 -133.6 389 2060 6222 241 -1 Y
05/27/02 04:55:29 11.4 232.5 1325 46.0 -126.1 388 1841 5561 246 -1 Y
05/27/02 04:57:00 11.3 202.9 1327 43.1 -119.4 387 1602 4839 250 -1 Y
05/27/02 04:58:29 6.9 179.3 1612 39.8 -113.3 387 1345 4062 254 -1 Y
Larry Wood
W 113.565 N 53.558
----- Original Message -----
From: "Dale Ireland" <direland@drdale.com>
To: "Seesat-l" <SeeSat-L@satobs.org>; "Edward Ehrlich" <eehrlich@shani.net>
Sent: Friday, August 09, 2002 2:21 PM
Subject: RE: ISS 5 consecutive passes
>
> I've seen 4, I think the record and theoretical max is 6.
> 52 N is too far north because the alignment has to occur in local
> spring-summer and at 52 north the period of darkness is too short. The
> optimum latitude is 35-40, longer night, still adequate elevation at
> farthest north pass.
> Dale
>
>
> > -----Original Message-----
> > From: Edward Ehrlich [mailto:eehrlich@shani.net]
> > Sent: Friday, August 09, 2002 12:49 AM
>
> > sunlight.
> > >Jay lives near New York. But also from my location at 52 degrees north
> > it >is possible to see ISS (and other sats)on more than 2 consectutive
> > passes.
> >
> > Thank you for the explanation. I'm a little surprised because I just
> > don't remember a case in the many (hundreds of thousands) low flying
> > satellite predictions that I've made, ever seeing more than two
> > consecutive passes.
> >
> > If anybody has the time and location from which they have seen 3 or more
> > consecutive passes, I would very much appreciate the information. I
> > would like to check if my software is handling that situation correctly.
> >
>
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