New Iridium orbits

Bjoern Gimle (bjorn@tt-tech.se)
Fri, 15 May 1998 11:57:23 +0200

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Jim Varney <jamesv@softcom.net> wrote:

>
Keith Stein <kstein@launchspace.com> wrote:
>
>> Delta/Iridium Nominal Orbit Data
>> 
>>                                     SV-1 SEP         SV-2 SEP        
>> PERIOD (MIN):                       97.478           97.267
>> ...
>>                                     SV-3 SEP         SV-4 SEP        
>> PERIOD (MIN):                       97.172           97.113
>> ...
>>                                     SV-5 SEP         SECO-3     
>> PERIOD (MIN):                       97.107           92.734
>> ...
>(snip)
My guess is that these periods are nodal. Since Iridium perigees
precess about 3.6 degrees forward (correct me if I'm wrong on either
of these assumptions) MM should be reduced by 0.01 from Jim's post:

Iridium SV4 SEP                                  637 x 610
1 90004U 98999D   98135.95064815  .00000600 +00000-0  60000-4 0 00000
2 90004 086.579  265.2510 0018820 241.5390 199.2790 14.81802449000008
Iridium SV5 SEP                                  635 x 611
1 90005U 98999E   98135.95354167  .00000600 +00000-0  60000-4 0 00003
2 90005 086.579  265.2490 0017280 262.9760 193.2100 14.81899900000009
Iridium SV3 SEP                                  639 x 614
1 90003U 98999C   98135.94775463  .00000600 +00000-0  60000-4 0 00006
2 90003 086.579  265.2530 0017460 219.0050 206.4410 14.80905132000004
Iridium SV2 SEP                                  641 x 621
1 90002U 98999B   98135.94486111  .00000600 +00000-0  60000-4 0 00004
2 90002 086.580  265.2550 0013920 194.3570 215.7060 14.79461050000005
IRIDIUM xx, 15 May 98, 21:28:30 UT               641 x 626
1 98765U 980xxA   98136.07113438  .00000026  00000-0  00000+0 0    17
2 98765  86.5808 257.4270 0011126 223.7504 136.2836 14.78706595    26
Iridium SV1 SEP                                  644 x 639
1 90001U 98999A   98135.93791667  .00000600 +00000-0  60000-4 0 00007
2 90001 086.583  265.2570 0003410 119.1820 253.8990 14.76260425000001

Name added for Iridflar use, heights/checksums by Orbitel.exe,
Ron Lee's first elset included, sorted on MM.

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