Tuesday, August 21, 2001

Sirio 1

 1977-080A


Sirio 1 tested Ku-band propagation, TV broadcasting and interactive video conferencing. NASA launched the satellite and controlled it for a 45 day test period after which control was from Fucino. After a successful 6 year test program at 15W, it was relocated to the Indian Ocean for experiments with the People's Republic of China. In 1985 the satellite was moved to 75.1E for VHF propagation experiments. The hydrazine ran out during this move and pressurization gas was used instead; 75.1E is a stable point where EW stationkeeping is not required. After that date it was operated intermittently. On 1989 Sep 28 it was switched off after performing end-of-life maneuvers.

Sirio was built by CIA SpA (Compagnia Industriale Aerospaziale, Roma), a consortium probably of Aeritalia and Selenia. They operated the spacecraft for 45 days, and then it was transferred to Telespazio from control from Fucino and Lario.

Launch mass was 398 kg. Size 1.44 dia 0.95 high cylinder bus, 2.0m high overall including antenna and ABM nozzle (1.5m without nozzle). The SNIA ABM is ellipsoid-cylinder 1.27 long 0.49 dia.

The apogee motor fuel was 178 kg with 500 kNs impulse. It gave a dV of 1.634 km/s in a 35 s burn using up 177kg of fuel and with an SI of 284s. On orbit the satellite was 220 kg (190 kg dry) and spun at 90 rpm. 30 kg of hydrazine.

Post 1999 TLEs for SIRIO appear to be cross-tagged with Ekran 9.

Sirio was moved to the eastern GEO stable point 75E in 1985; it librates between 74.4E and 75.9E.

Sirio dry  168 kg 
ABM dry  22 kg 
ABM prop  178 kg 
Hydrazine  30 kg 

Total  398 kg 

Thanks to Ted Molczan:


Objects mistagged as Sirio 1 
 

DateTimeEventOrbit  

1979 Oct 23   08366 GOES-1? [Mistag] 1437.71 35612 x 36023 x 1.3 GEO 116W+0.4W 
1985 Mar 30-1999  Insat 1A  1435.005 35694 x 35836 x 4.08  
1999-2002   ISON UI.41 (C00101) 


Sirio 1 
 

DateTimeEventOrbit  

1977 Aug 25  2349  Launch by Delta 2313  CC LC17 
  T+0:38 SRM 1-3 off 
  T+1:10 SRM 1-3 sep 
  T+3:48 MECO 
  T+3:56 Stage 1 sep 
  T+4:06 SES-1 
  T+4:55 Fairing sep
 2358  T+8:54 SECO-1 180? x 180? x 28.5  
  13 min coast 
1977 Aug 26  0010 T+21:55 SES-2 
 0011 T+22:08 SECO-2  180? x 2081?  
 0012 T+23:07 spinup 
 0012 T+23:09 Stage 2 sep 
 0012 T+23:51 Star 37D burn 
 0013  T+24:35 TECO  230 x 37670 x 23.0 
 0014 T+25:47 Stage 3 sep 
 0029? Depletion  872 x 2081 x 27.1 
 0500? Apo 1 
 1700? Apo 2 
1977 Aug 27  0400?  Apo 3 
 1500? Apo 4 
1977 Aug 27  1457  Sirio AKM burn 
1977 Sep 8   On station  GEO 15W 
1977 Sep 15   Final trim, 24 kg hydrazine left 
1977 Sep 29   Fucino tests 
1977 Sep 29 0000  To SIOCC Telespazio/Fucino 
1977 Dec 1  1120 EW trim burn 15.6W 
1978 Mar 30  0745 NS trim burn 
1978 May 2  1911 EW trim burn  GEO 15.6W 
1978 Jul 21    GEO 14.6W 
1978 Oct 31  1612 NS trim burn, 18.5 kg left GEO 15.0W 
1978 Dec 12  1240  EW trim  
1979 Apr    GEO 15W 
1979 May 4   NS and EW trim 
1979 Oct 30   NS and EW trim 
1980 Dec    GEO 15.2W 
1981 Nov 5   First archival TLE 1436.21 35776 x 35801 x 0.1 GEO 24.9W 
1982 Oct 30   1436.11 35767 x 35806 x 0.1 GEO 24.4W 
1983 Jan 9    1436.09 35772 x 35800 x 0.0 GEO 24.5W 
1983 Mar    GEO 25W 
1983 Mar 24   Out of GEO 
1983 Aug   Arrive 65E for PRC experiments  GEO 65E 
1983 Aug 30    1436.34 35774 x 35808 x 0.5 GEO 65.3E 
1984 Mar    GEO 64E 
1985 Jan    GEO 65E 
1985 Jan 30    1436.01 35769 x 35800 x 1.7 GEO 65.2E 
1985 Feb 28   mv out35760 x 35793 x 1.8  
1985 Mar 30    1435.53 35758 x 35792 x 1.9 GEO 70.8E+0.13E 
1985 Apr   AOCS problem 
1985 Apr 9   Stop at 73.3E 
1985 Apr 10   Fucino ground stn dismantled (to San Marco) 
1985 Apr 11   Stop burns 1-2  
1985 Apr 17   Stop burn 3-12 
1985 Sep   mv in at 75.1E 
1987 May 30   [Mistag]  1435.37 35733 x 35810 x 4.0 GEO 36.7E+0.2E 
1987   Orbital trim  
1989   Attitude manuever tests 
1989 Jul 12   [Mistag] 1436.41 35726 x 35858 x 5.9 GEO 29.1E 
1989 Sep 28   end of opsGEO 75E 
1990 Mar 25   [Mistag] 1434.75 35704 x 35816 x 6.6 GEO +0.33E 
1999 Apr 27   [Mistag] 1437.30 35721 x 35899 x 12.5 GEO 56.9E+0.3W

Saturday, August 18, 2001

Kosmos 1410

 1982-096A


The S5M performance was lower than usual across both burns but this does not seem to have had a major impact on Kosmos-1410’s geodesy mission.


Kosmos-1410 
 

DateTimeEventOrbit  

1982 Sep 24  0915 Launch by 11K68  PL 
  T+2:00 St 1 sep 
  T+3:33 GO sep 
  T+4:38 St 2 sep, alt 148 km  -2700? x 200? x 82.6  
  T+5:20 S5M burn 1, alt 172 km  -2700? x 200? x 82.6  
 0921 T+6:52 S5M MECO-1, alt 222 km  -31 x 1502 x 82.6 
  T+42:18 BOZ burn 
  T+43:56 S5M MES2  -31 x 1502 x 82.6  
  T+44:15 S5M MECO2 
 0959 T+44:45 S5M sep 
1982 Sep 25   116.0 1500x1522x82.6 

Friday, August 10, 2001

Orbcomm FM5

 1997-084F


8 satellites were launched to plane A on 1997 Dec 23. Each had mass 41 kg, was 1.0m dia and 0.17m high. Future planes would be B,C,D and G. The Pegasus XL rocket, launched from Wallops Island, entered transfer orbit, with the HAPS stage circularizing, dispensing, and then lowering perigee.

The HAPS stage was the first to be integrated by Primex rather than Orbital. It was also the first to make a depletion burn to avoid repeating the debris explosion of the second HAPS flight in 1994.


Orbcomm A1 
 

DateTimeEventOrbit  

1997 Dec 23  1813  L-1011 takeoff from WFF 
  100 km E of Virginia, 12 km alt 
 1911:42  T+0:00 Drop by L-1011 
 1911:47  Launch by Pegasus XL/HAPS   
  T+1:17 Pegasus stage 1 burnout 
  T+1:38 Stage 2 burn 
  T+2:18 Fairing sep 
  T+2:49 Stage 2 burnout 
  T+6:14 Stage 2 sep 
 1917  T+6:14 Stage 3 burn 
 1919:03  T+7:21 Stage 3 burnout 
 1920:02  T+8:20 Stage 3 sep  298 x 734 x 5.0 
 1920:03  T+8:21 HAPS burn 1 34s 
 1920:37  T+8:55 HAPS cutoff, transfer orbit  300? x 825? x 45.0 
 2004:21? T+52:39 HAPS burn 2 223s 
 2008:04? T+56:22 HAPS cutoff  825 x 836 x 45.0 
 2008  T+57:02 A5 sep 
 2010  T+59:02 A6 sep 
 2012  T+61:02 A7 sep 
 2014 T+1:03:02 A8 sep 
 2016  T+1:05:02 A1 sep 
 2018  T+1:07:02 A2 sep 
 2020  T+1:09:02 A3 sep 
 2022  T+1:11:02 A4 sep 
 2025?  HAPS depletion  97.1 410 x 827 x 42.7 

Monday, August 6, 2001

Molniya-1S

 1974-060A


Molniya-1S, 11F658 No. 38, was launched by a Proton from Baikonur in Jul 1974, to test out communications from geostationary orbit and the new Blok DM booster. 


Molniya-1S 
 

DateTimeEventOrbit  

1974 Jul 29  1200:00 Launch by Proton  KB 
 1209  Stage 3 sep 
 1316? DM burn 1  200? x 35840? x 47.3  
 1845?  DM burn 2 
 1850?  DM sep 
1974 Jul 29  0417   1439.00 35843 x 35843 x 0.1 
1977 Aug 20  0418   1435.91 35751 x 35814 x 2.5 GEO 41.7E+0.04W 
 
1978 Apr 3  1015   1435.11 35726 x 35808 x 2.9 GEO 86.1E+0.2E 
1981 Jan 24  1300   1436.43 35732 x 35855 x 4.9 GEO 105.2E+0.1E 
1981 Apr 23    1436.97 35753 x 35854 x 5.0 GEO 92.0E+0.2W 
1981 May 7    1437.04 35745 x 35865 x 5.1 GEO 88.8E+0.2W 
1983 Jan 28    1435.75 35732 x 35827 x 6.2 GEO 105.9E+0.07E 
1987 Oct 27    1436.32 35758 x 35823 x 9.7 GEO 107.1E+0.0E 
1988 Jan 28    1436.93 35768 x 35837 x 9.9 GEO 94.2E+0.2W 
1989 May 5    1435.10 35725 x 35808 x 10.9 GEO 64.8E+0.2W 
1992 Aug 29    1436.96 35762 x 35845 x 13.1 GEO 92.5E+0.2W 
1996 Mar 3    1435.15 35743 x 35793 x 14.7 GEO 61.1E+0.2W 
1998 Aug 1    1435.04 35727 x 35804 x 15.2 GEO 71.6E+0.2W 

Thursday, August 2, 2001

Marisat 2

  1976-053A


Comsat General's second maritime communications satellite, Marisat F-2, was stationed at 177E to become Marisat Pacific. In 1982, it was leased by INMARSAT to become their Pacific Primary satellite, being replaced in that role in late 1983 by Intelsat 507.


Marisat 2
 

DateTimeEventOrbit  

1976 Jun 10  0009  Launch by Delta 2914  CC LC17 
 0012  Thor sep 
 0013  T+4:01? SES-1 4:59? 
 0018:00  SECO-1  
 0030:44  T+21:44 SES-2 9s 
 0030:53  T+21:53 SECO-2 
 0031:54  T+22:54 Stage 2 sep 
 0032:36  T+23:36 TES 
 0033:20  T+24:20 TECO 
 0034:32  T+25:32 Stage 3 sep 185 x 36924 x 25.5 
 0127:20  SES-3 test 1s 
 0127:21  SECO-3  273 x 649 x 28.5 
 0800?  Apo 1 over 61E 
 1900? Apo 2 over 103W 
1976 Jun 11  0600?  Apo 3 over 92E 
 1700?  Apo 4 over 70W 
1976 Jun 12  0030  AKM 
1976 Jun    GEO 176.5E 
1977 Jan 18   (9478) 1436.08 35781 x 35791 x 2.1 GEO 175.9E 
1977 Dec 7   (9478) 1436.16 35778 x 35796 x 1.5 GEO 176.3E 
1978 Jan 30   (9478) 1435.97 35770 x 35798 x 1.4 GEO 176.7E 
1978 Feb 8   (9478) 1435.97 35769 x 35798 x 1.3 GEO 177.0E 
1978 Feb 8   (8882)  1435.97 35769 x 35798 x 1.3 GEO 177.0E 
1980 Mar 5   (8882)  1436.02 35772 x 35797 x 0.2 GEO 176.7E 
1981 Sep 15   (8882) 1435.98 35772 x 35796 x 1.4 GEO 176.8E 
1981 Sep    GEO 176E+0.00 
1981 Oct 1   (9478) 1436.19 35778 x 35798 x 1.5 GEO 176.4E 
1982 Feb   Control to INMARSAT 
1982 May 25   (9478) 1436.22 35782 x 35795 x 2.0 GEO 176.6E 
1982 Oct   INMARSAT Pacific Primary  GEO 176E 
1983 Mar 5   (9478) 1436.17 35775 x 35800 x 2.4 GEO 174.9E 
1983 May 20   (9478) 1436.14 35776 x 35798 x 2.8 GEO 176.2E 
1983 late   Replaced by I-507 MCS 
1984 Sep 16   (9478) 1436.12 35782 x 35792 x 4.0 GEO 176.2E 
1986 Aug 19   (9478) 1436.16 35783 x 35792 x 5.7 GEO 176.2E 
1990 Jan 4   (9478) 1436.14 35782 x 35792 x 8.7 GEO 176.2E 
1991 Jul 18   (9478) 1435.90 35767 x 35798 x 9.8 GEO 176.7E 
1991 Jul 28   (9478) mv  1436.09 35782 x 35791 x 9.8 GEO 177.7W 
1992 May 14   (9478) 1436.03 35775 x 35794 x 10.4 GEO 177.8W 
1993 May 18   (9478) 1436.06 35779 x 35792 x 11.2 GEO 177.9W 
1996 Feb 26   (9478) 1436.11 35772 x 35801 x 12.9 GEO 178.0W 
1996 Sep 23   (9478) 1436.11 35765 x 35808 x 13.1 GEO 177.6W 
1996 Sep 25  Boosted out of GEO 
1996 Sep 27   (8882) 1495.17 35779 x 35796 x 13.1 
1996 Oct 10   (8882) 1501.63 36489 x 37629 x 13.4 
1997 Jan 16   (8882) 1501.57 36501 x 37615 x 13.5 
1999 Apr 27   (8882) 1501.58 36509 x 37608 x 14.3 

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