Saturday, January 6, 2007

Brasilsat B2

 1995-016B


The Brasilsat B2 satellite launched for the Brazilian telephone company Embratel of Rio De Janeiro was another HS376W widebody model. The 1078 kg satellite would be stationed over the Atlantic; its C-band transponders provide television relay and telephone and data communication functions, while the X-band transponder is for military use.


Brasilsat B2 
 

DateTimeEventOrbit  

1995 Mar 28  2314  Launch  CSG ELA2 
 2317  T+3:14? Stage 1 sep 
 2318  T+4:07? Fairing sep 
 2319  T+5:27? Stage 2 sep 
 2319  T+5:32? Stage 3 burn 
 2332  Stage 3 MECO 
 2334? Stage 3 sep 
1995 Mar 28    632.30 220 x 35829 x 7.0 
1995 Mar 30  1230? LAM-1 
1995 Mar 31    765.31 6766 x 35907 x 2.7 
1995 Apr 1  1600? LAM-2 
1995 Apr 6    1424.69 35343 x 35782 x 0.2 GEO 60.9W+2.8E 
1995 Apr 8    1436.02 35764 x 35805 x 0.1 GEO 60.8W 
1995 Aug 4    1436.14 35784 x 35791 x 0.1 GEO 65.1W 
1997 Oct 16    1436.11 35779 x 35794 x 0.0 GEO 65.0W 
1999 Oct 15    1436.15 35781 x 35794 x 0.0 GEO 65.0W 
2006 Jul 28    1436.13 35781 x 35793 x 0.0 GEO 65.0W 

Friday, January 5, 2007

DMSP 1980

 1980-F02


Block 5D-1 S-4 was launched on 1980 Jul 15 by Thor DSV-2U No. 59-2425 from SLC10W at Vandenberg. The Thor and Star 37XE stages separated successfully and placed the spacecraft in transfer trajectory, coasting to apogee where the Star 37S motor ignited. However, 9 sec into the burn contact with the spacecraft was lost and it was initally assumed the motor exploded. A later Thiokol document indicates a successful motor burn. An article in The Space Review by Wayne Eleazer reveals that an incident during launch preparations when the booster partly fell off the launch mount resulted in misalignment of the electrical connectors between stage 2 and 3. Stage 2 initially failed to separate, with the third stage firing and dragging along the second stage until the wiring ripped free, causing short circuits and errors in the guidance computer. The motor burn was completed but with the vehicle descending, and the spacecraft did not achieve orbit.

It is retrospectively known as Block 5D-1 F-5. The satellite carried the first SSH-2, a vertical temperature profile instrument with tighter filter bands and the SSR, a special sensor followon to the IFM experiment on S-2. The OLS sensor was OLS-5; OLS-4 was kept on the ground and later converted to OLS-11.


DMSP 16538 (S-4, F-5) 
 

DateTimeEventOrbit  

1980 Jul 15  0222:11  Launch by Thor DSV-2U  V SLC10W 
 0224:44  Thor MECO (T+2:33) 
 Fairing sep 
 0224  Thor sep, impact 2800 km SW VAFB 
 0225? Star 37XE burn 
  Coast 
 0232? Star 37S ignition at apogee, 820 km?  -4 
 0232? Guidance failure 9s into burn  -3700 x 820 x 98.7 
 0232? Stage 2 breaks free? 

0243  DMSP/Star 37S reentry near 132W 9S? 

Monday, January 1, 2007

Club Management: August 2006

 https://welib.org/md5/50f1528ffbbcabf382ccca2a21318943

Meridian 1

 2006-061A


NPO-PM 14F112 communications satellite launched by Soyuz. Operated by Titov Center.

Replaces Molniya-1,3 and the naval comms capability of Parus. Based on Uragan-M bus? Carries 25 kg of hydrazine. Uses 14S737 fairing of 3.715m dia 10.4m long.


Meridian No. 11L 
 

DateTimeEventOrbit  

2006 Dec 24  0834:44  Launch by Soyuz-2-1A/Fregat  PL LC43/4 
  Strapons sep 
 0839  Blok A sep 
 0843  Blok I sep  8 x 204 x 62.8  
 0844 Fregat MES-1 
 0846?  Fregat MECO-1  203 x 203 x 62.8 
 0924  Fregat MES-2 10.5min 
 0930  Meridian perigee 
 0934  Fregat MECO-2  278 x 39801 x 62.8 
 1528  Meridian first apogee 
 1530?  Fregat MES-3 15s 
 1530? Fregat MECO-3  1011 x 39815 x 62.8 
 1534  Fregat sep  
 2130  Perigee at 1011 km  

Iridium 4

 1997-020E


The first batch of three Iridium satellites were ready for launch in Jan 1997, but a weather delay meant that another Delta carrying GPS satellite was launched first. When this Delta promptly exploded, the Iridium launch slipped four months and two more satellites were added to the cargo. The Delta 7920-10C made a two-burn ascent to a circular 86 degree orbit and the specially designed dispenser released the five payloads, SV004 to SV008. After the third satellite was deployed, the reaction control system of the Delta stage lost pressure. The final two satellites were safely ejected, although the last one ended up slightly low, but the vehicle was not oriented correctly for the depletion burn and ended up in a higher orbit instead of a lower one.


Iridium SV004 
 

DateTimeEventOrbit  

1997 May 5  1455  Launch by Delta 7920A-10C  V SLC2W 
 1459  Thor sep  
 1459  Delta burn 1  
  10C fairing sep 
 1506  Delta SECO 1 
 1553  T+58? Delta burn 2 
 1553  Delta SECO 2  625 x 643 x 86.4 
 1557  Iridium 8 deploy 
 1605? Iridium 7 deploy 
 1610? Iridium 6 deploy 
  Delta GN2 pressure drop
 1615? Iridium 5 deploy 
 1620  Iridium 4 deploy 
1997 May 5    97.39 625 x 643 x 86.4 
1997 May 14  0100  Iridium SV008 orbit raise phase  
1997 May 15    97.44 626 x 645 x 86.4 
1997 May 20  1324   98.07 664 x 668 x 86.4 
1997 May 23  0335   98.07 663 x 669 x 86.4 
 2135   98.87 702 x 707 x 86.4 
1997 May 27  1735   100.44 773 x 785 x 86.4 
1997 May 30  1546   100.40 771 x 784 x 86.4 
1997 Sep 9  1547   100.40 772 x 782 x 86.4 
1997 Sep 11  1114   100.15 761 x 770 x 86.4 
1997 Sep 22  0430   100.18 760 x 773 x 86.4 
1997 Sep 26  1528   100.38 769 x 784 x 86.4 
1997 Sep 30  1315  100.40 771 x 783 x 86.4 
1998 Mar 8    100.40 774 x 780 x 86.4 
2004 Jun 29    100.40 775 x 779 x 86.4

May 13,2026

  https://planet4589.org/space/jsr/back/news.855.txt