Wednesday, December 26, 2007

Astra 2D

 2000-081A


BSS 376HP at 28.2E. Launch 2000 late. Launch mass 1414 kg. Size 8m high 2.2m dia.

The V138 Ariane 5G had EPS, ASAP-5/LDREX, ACU/GE-5, SYLDA, Astra 2D.

Astra 2D will serve the British Isles.

Assume that the apogee burn was Dec 23 0800 over 42E. In 5.4 days it had moved to 24E, so -3.3 deg/d. Simulate a burn at Dec 28 0800 over 24.7E to 3.46deg/d: 6m/s does the trick. Get good agreement with transfer orbit. However, a late transfer orbit elset on Dec 30 suggests the possibility of an apogee burn at that time.


Astra 2D 
 

DateTimeEventOrbit  

2000 Dec 20 0026 Launch by Ariane 5  CSG ELA3 
  T+2:40 EAP sep 
  T+3:24 Fairing sep 
 0036 T+10:06 EPC cutoff 
 0036 T+10:12 EPC sep 59 x 1839 x 6.6 
 0036 T+10:27 EPS MES 
 0052 T+26:55 EPS MECO  
 0054 T+28:44 Astra 2D sep 
 0057 T+31:20 Sylda 5 sep 
 0100 T+34:40 GE-8 sep 
 0106 T+40:15 LDREX deploy 
 0130 T+1:04:37 LDREX sep 
 0210? EPC reentry 
2000 Dec 20    630.58 185 x 35775 x 2.0 
2000 Dec 21  1838? Orbit raise
2000 Dec 22    633.82 292 x 35835 x 2.2 
2000 Dec 23  0800?  AKM 
2000 Dec 28    1441.44 35886 x 35895 x 0.3 GEO 24.1E 
2000 Dec 30  0900?  late possible AKM 
2000 Dec 31    1436.22 35763 x 35814 x 0.3 GEO 24.0E 
2001 Jan 18    1434.18 35744 x 35753 x 0.1 GEO 26.7E+0.5E 
2001 Mar 17    1436.05 35732 x 35838 x 0.1 GEO 28.1E 
2006 Jul 28    1436.16 35770 x 35804 x 0.1 GEO 28.2E 

Saturday, December 22, 2007

Intelsat 804

 1997-083A


Intelsat 804 was launched to the IOR position, covering Asia, Europe and Africa. Mass is 3455 kg launch, 2079 kg BOL, 1601 kg dry. The bus is 2.5 x 2.2 x 5.2 m with 10.8m solar panel span. Location was be 64 E (IOR); it was moved to the Pacific 176E location in 2002 and then to the 174E location (replacing I-802) in 2004. 


Intelsat 804 
 

DateTimeEventOrbit  

1997 Dec 22  0017  Launch by Ariane 42L (V104) 
 0019  T+02:36 PAL sep 
 0020  T+03:23 St 1 sep 
 0021  T+04:13 Fairing sep 
 0022  T+05:41 St 2 sep 
 0022  T+05:50 St 3 burn 
 0035  T+18:51 St 3 cutoff 
 0037  T+20:46 St 3 sep
 0040  T+23:41 St 3 depletion
1997 Dec 22    631.81 363 x 35760 x 7.0 
1997 Dec 23??  LAM-1  
1997 Dec 25??  LAM-2
1997 Dec 29    1436.11 35767 x 35805 x 0.1 GEO 47.0E 
1998 Jan 21    1435.93 35776 x 35789 x 0.1 GEO 47.0E 
1998 Jan 25   mv out 
1998 Feb 3   mv in  1436.11 35774 x 35798 x 0.1 GEO 64.1E 
1999 Oct 17    1436.07 35767 x 35804 x 0.0 GEO 64.1E 
2002 Oct 19    1436.07 35771 x 35800 x 0.0 GEO 64.1E 
2002 Oct   Move to Pacific  
2002 Dec 4    1436.08 35772 x 35799 x 0.1 GEO 176.0E 
2004 Aug 3   mv out 1436.10 35768 x 35804 x 0.1 GEO 176.0E 
2004 Aug 27    1436.09 35771 x 35801 x 0.0 GEO 174.0E

Thursday, December 20, 2007

USA-114

 1995-057A


UHF F6, the third UHF F/O Block II satellite, was launched by Atlas II from Cape Canaveral on 1995 Oct 22. It had a launch mass of 3017 kg and was stationed at 100W, replacing Leasat 3.


UHF F/O F6 
 

DateTimeEventOrbit  

1995 Oct 22  0800:02  Launch by Atlas II (AC-119) 
 0802  BECO 
 0802  Booster sep 
 0803  Fairing sep 
 0804  SECO 
 0804  Atlas sep 
 0805  Centaur AC-119 MES1 
 0811 Centaur AC-119 MECO1 
 0822?  Centaur AC-119 MES2 
 0824? Centaur AC-119 MECO2 
 0827? Centaur AC-119 sep  551.9 320 x 31500 x 27.0 
 0845?Centaur AC-119 depletion  478.1 267 x 27483 x 27.0 (AC-119) 
1995 Oct 22    482.12 276 x 27701 x 27.0 
1995 Oct 23  1630?  LAM-1 perigee 
1995 Oct 23    551.94 320 x 31500 x 27.0 
1995 Oct 25  0100?  LAM-2 apogee 
1995 Oct 25    798.58 7657 x 36612 x 14.6 
1995 Oct 26  1630? LAM-3  
1995 Oct 27    1151.13 23391 x 36620 x 7.3 
1995 Oct 28  0630?  LAM-4 
1995 Oct 28    1411.73 34033 x 36583 x 5.3 
1995 Oct 29  0800?  LAM-5 
1995 Oct 29    1430.25 34761 x 36583 x 5.3 GEO 170.4W+1.4E 
1995 Nov 6    1436.02 34984 x 36585 x 5.1 GEO 171.4W 
1995 Nov 22    1435.98 34979 x 36589 x 5.1 GEO 172.1W 
1995 Nov 27   mv out 
1995 Dec 18    1436.05 35773 x 35798 x 5.0 GEO 105.3W 
1996 Apr 14    1436.09 35773 x 35799 x 4.9 GEO 105.4W 
1998 Jan 29    1436.12 35776 x 35797 x 4.2 GEO 104.7W 
1999 Jul 29    1436.09 35774 x 35798 x 3.5 GEO 105.9W 
2005 May 12    1436.12 35771 x 35802 x 9.0 GEO 104.5W 

Wednesday, December 19, 2007

Progress M-59

 2007-002A


PM-59 11A615A55 No 359 Soyuz U, flight 24P. Mass 7274 kg. Cargo 2561 kg, 1390 in GO.


PM59 
 

DateTimeEventOrbit  

2007 Jan 18  0212:15  Launch by Soyuz-U No. Ts15000-107 
 0220:58  T+8:45 Blok-I MECO 
 0221:04  T+8:49 Blok-I Sep 
 0610:18  DV1 11.8m/s 
 0640:27  DV2 13m/s 
2007 Jan 19  0257:08  DV3 1.0m/s 
2007 Jan 20  0102:06  DV4 22m/s 
 0125:21  DV 0.8m/s 
 0146:16  DV 17.6m/s 
 0227:43  DV 7.1m/s 
 0232:41  DV 5.0m/s 2.6km range 
 0235:11  DV 2.2m/s 1.0km range 
 0236  Begin flyaround  
 0244  Complete flyaround at 170m 
 0250  Approach  
 0258:53  Docked with Pirs 
2007 Aug 11407:05  Undocked from Pirs 
 1842  Deorbit burn 
 1927  Impact in Pacific 

Monday, December 10, 2007

Spaceway 1

 2005-015A


DirecTV (formerly Hughes Network Systems) Ka-band Spaceway constellation will have 8 satellites covering N America (101W, two), Latin and South America (49W, two), Europe-Africa-Middle East (25E, two), and Asia-Pacific (111E, two). Also reservations at 99W 54E 101E and 164E.

F1 is BSS 702 satellite at 102.8W. Launch 2005 for in-orbit delivery by Zenit-3SL.

Mass 6080 kg (or 6067 kg or 5993 kg) at launch, 3832 kg BOL, 3691 EOL. Size is 3.2 x 3.4 x 5.1m with 40.9m span.

After launch, the satellite reached GEO height very slowly - presumably using XIPS.


Spaceway 
 

DateTimeEventOrbit  

2005 Apr 26 0731:29 Launch by Zenit-3SL No. 15 
  T+2:30 St 1 sep 70 km 
  T+3:52 Fairing sep 118 km  
  T+8:31 St 2 sep  -2339 x 198 x 0  
 0740:09 T+8:40 DM-SL MES-1 
 0751:49 T+20:20 MECO-1  246 x 34290 x 0  
 0801:35  T+30:10 DM sep 
2005 Apr 26    599.73 261 x 34097 x 0.02 
2005 Apr 28   Perigee raise  619.18 1061 x 34311 x 0.36 
2005 Apr 30   Apogee raise  680.44 1068 x 37247 x 0.41 
2005 May 1   Apogee raise  744.18 1070 x 40578 x 0.34 
2005 May 2   Apogee raise  846.89 1068 x 45478 x 0.4  
2005 May 4   Perigee raise  922.00 4493 x 45509 x 0.3 
2005 May 6   Perigee raise  1057.90 10507 x 45519 x 0.13 
2005 May 7   Perigee raise  1312.52 21197 x 45465 x 0.13 
2005 May 9  1900?   1418.88 25415 x 45482 x 0.25 
2005 May 11    1435.16 26062 x 45473 x 0.23  
2005 May 12    1436.05 26097 x 45474 x 0.26 
2005 May 24    1440.11 26911 x 44818 x 0.23 
2005 Jun 1    1435.81 28119 x 43442 x 0.3  
2005 Jul 12    1435.93 33226 x 38340 x 0.2  
2005 Jul 31    1436.12 35784 x 35789 x 0.1 GEO 102.8W 

Wednesday, November 28, 2007

DemoFlight 2

 2007-F02


Falcon 1 Demo Flight 2, with payload carrying AFSS (Autonomous Flight Safety System) and LCT2.

LCT2 (Low Cost TDRSS Transceiver) is a low-cost transceiver for launch vehicles that would allow them to relay telemetry to the ground through the agency's TDRS satellites. The current goal of the LCT2 effort is to produce a transceiver that will significantly lower the flight hardware costs required to communicate through NASA's Tracking and Data Relay Satellite System (TDRSS) and will meet the suborbital and orbital launch vehicle needs for Space Based Range Communications (SBRC).

AFSS (Autonomous Flight Safety System) is a real-time onboard hardware and software system for tracking and possible flight termination. AFSS is designed primarily for small expendable vehicles at remote launch sites where providing traditional ground-based range safety infrastructure, including radio frequency (RF) communication and command links, radar stations, data processing, display facilities, and trained operators, would be extremely expensive. Advantages of using AFSS include global coverage and decreased costs during remote launch site operations.

Remains attached to Falcon stage 2 (although one report claimed it separated).

Planned orbit 330 x 684 km x 9 deg. Actual velocity 5.1 km/s and apo 289 km.

Slosh instability in second stage caused the launch to fail - it was addressed with baffles in later missions.


F2 
 

DateTimeEventOrbit  

2007 Mar 21  0110  Launch from Omelek 
  T+2:50? Stage 1 sep 
  T+2:55? Stage 2 burn, planned 6.5min 
  T+3:20 Fairing 
  T+4:25 Oscillation in control system 
  Oscillation grows with time 
  T+7:54 Stage 2 cutoff 
  Stage 2 sep from payload? 5.1 km/s -4200? x 289 x 9 
  Payload and stage 2 reentry  

Sunday, November 18, 2007

Gorizont 28

 1993-069A


In 1998 Gorizont No. 40 was reportedly subleased to Lockheed Martin Global Telecommunications and moved to a Tongasat slot,however an orbital move was not made. This is probably a misreporting of the Gorizont 41 sale. It was in service in 2000 as a GPKS satellite.


Gorizont No. 40 
 

DateTimeEventOrbit  

1993 Oct 28  1517:00  Launch by Proton-K  KB 
  Stage 2 burn 
  Stage 3 burn 
 1526  Stage 3 sep  179 x 197 x 51.7 
 1634?  DM burn 1  233 x 35782 x 47.3 
 2150?  DM burn 2 
 2154? Blok-DM No. 72L sep 
1993 Oct 29    1435.33 35753 x 35789 x 1.5 GEO 90.6E+0.2E 
1993 Nov 9    1435.94 35765 x 35802 x 1.4 GEO 89.8E 
1993 Dec 16    1436.11 35770 x 35803 x 1.4 GEO 90.4E 
1994 Jul 15    1436.03 35778 x 35791 x 0.9 GEO 90.4E 
1995 Sep 8    1436.00 35777 x 35791 x 0.2 GEO 90.0E 
1997 Feb 28    1436.23 35777 x 35800 x 1.1 GEO 89.6E 
1999 Oct 18    1436.10 35778 x 35795 x 3.0 GEO 90.2E 
2000 Apr 19    1436.04 35775 x 35795 x 3.4 GEO 90.2E 
2000 May   Move to 96E 
2000 May 9    1435.99 35760 x 35808 x 3.4 GEO 96.7E 
2004 Oct 19    1436.19 35779 x 35796 x 7.0 GEO 96.3E 
2004 Oct 28   mv out 
2004 Oct 28   mv in 
2004 Dec 30    1435.97 35779 x 35788 x 7.1 GEO 102.5E 
2006 Aug 4    1436.06 35780 x 35791 x 8.5 GEO 103.0E 
2006 Sep 28   Depart 103E 
2006 Oct   Move to 126E 
2006 Nov 10    1436.20 35780 x 35796 x 8.7 GEO 126.2E 

Wednesday, November 14, 2007

Kosmos 2431

 2007-052A


Satellite block 36, Glonass-M 18,19,20 as Kosmos-2431/2432/2433 were launched in Oct 2007. Launch by Proton K No 41017 and Blok DM2 11S861 No 110L.


Kosmos-2431 
 

DateTimeEventOrbit  

2007 Oct 26  0735:24 Launch by Proton 41017  KB PL81/24 
 0737:31  Stage 1 sep 
 0738:42  Fairing sep
 0741:02  Stage 2 sep 
 0745:04  Stage 3 MECO 
 0745:17  Stage 3 sep  
   94 x 131 x 64.8  
 0812:03  T+36:39 DM 11S861 No 110L MES-1 
 0817:49  DM MECO-1  401 x 19130 x 64.9  
 1104:47  DM MES-2 
 1107:10  DM MECO-2 
 1107:25  GLONASS sats sep from DM 

Town and Country: May 2007

 https://welib.org/md5/9fb426be80af0e7f86feaf0e41241e9f

Thursday, November 8, 2007

Aviation Week: June 11,2007

 https://welib.org/md5/c1b77d2c5c94812541f3e0700b8d8748

Navstar 26

 1992-039A


Navstar SVN 26 (USA 83) was launched on 1992 Jul 7 and became operational in plane F-2 on Jul 23.


Navstar 26 
 

DateTimeEventOrbit  

1992 Jul 7  0920:01  Launch by Delta 7925  CC LC17B 
  SRM 1-9 sep 
  St 1 sep 
 0924  T+4:40? SES-1 
 0931  T+11:00? SECO-1  185 x 185 x 34? 
  T+20? SES-2 36s? 
 0940  T+20? SECO-2  180? x 728? x 34.0? 
 0941 T+21? St 2 sep  
 0942  T+22? TES 1:24 
 0943  T+23? TECO 
 0945  T+25? St 3 sep 186 x 20459 x 34.76 
 1024? T+1:04 SES-3 depletion  564 x 728 x 20.72 
1992 Jul 10  0030? Star 37XFP burn 
1992 Jul 23   In service 
1992 Jul 24    717.95 19959 x 20403 x 55.0 
1995 Mar 15    718.03 19933 x 20434 x 54.86 
1997 Feb 1   Operating at slot F-2 
2005 May Operating at F-2 

Progress M-58

 2006-045A


PM-58 11F615A55 No. 358. 7320 kg launch. Flight 23P.

Launch by Soyuz-U No. 102. It soft-docked with the Zvezda module at 1429 UTC on Oct 26. However there were indications that the Kurs rendezvous orientation antenna mounted on the docking ring at the forward end of the Progress did not retract correctly. The Station remained in free drift for several hours; eventually it was decided that the antenna was fine, the latches between Progress and Zvezda were driven closed at around 1806 UTC, and the Station resumed active attitude control.

Launch mass 7093 kg. Probably carried BTN-M1 experiment. Cargo 2394 kg, with 16 kg of EVA accounted cargo.


PM58 
 

DateTimeEventOrbit  

2006 Oct 23  1340:36  Launch by Soyuz-U  KB  
  T+1:58 Strapons sep 
  T+2:42 Fairing sep 
  T+4:45 Blok A MECO 
  T+4:47 Blok-A sep 
  T+4:57 KhO sep 
  T+8:46 Blok-I MECO 
 1349:25  T+8:49 Blok-I sep   
 1731:37  DV1 15.7m/s 39s 
 1756:33  DV2 2.2m/s 6s 
2006 Oct 25  1419:54  DV3 7.0s 0.5m/s 
2006 Oct 26  1232:04  DV4 14.9m/s 
 1256:20  DV5 1m/s 
 1317:42  DV6 33.6m/s 
 1358:38 TCM 8.4m/s 
 1404:49  TCM 4m/s 
 1407:12  TCM 2.5m/s 
 1408  At 400m from ISS and begin flyaround 
 1419  Begin approach to Zvezda from 190m 
 1429:18  Soft docked with Zvezda 
  2AO-VKA antenna fouled SM 
 1801  Hard docked 
2006 Nov 29  2305 TCM; aborted after 3:16; 0.50m/s, 1 km 
2006 Dec 4  2136 TCM, successful 23min 
2007 Mar 21  1810:32  Undocked from Zvezda 
 1814  Sep burn  325 x 352 x 51.6 
 2244:30 Deorbit 2:29 85.4m/s 
 2319 Reentry 
 2330 Impact Pacific 44 15S 142 24W 

Tuesday, November 6, 2007

Aviation Week: February 7,2005

 https://welib.org/md5/a2270a755102f400ee419f433017817a

Satcom C4

1992-057A


Satcom C-4 was owned by GE Americom and built by GE Astro Space using the Series 3000 bus. Launched in Aug 1992, it was to replace the Satcom 4R (aka Anik D-2) satellite at 82W. In fact, it was moved soon after launch to 135W. In 2001, C-4 became the property of SES Americom, with communications services provided by SES Gibraltar.


Satcom C4 
 

DateTimeEventOrbit  

1992 Aug 31  1041  Launch by Delta  CC LC17B 
  Az 93 deg 
  Delta SES-1 
 1051? Delta SECO-1  185 x 185 x 28.5 ? 
 1105?  Delta SES-2? 
 1105?  Delta SECO-2? 185 x 1785? x 27.5 
 1156? Delta SES-3? 
 1156? Delta SECO-3?  1750 x 1800? x 26.2?  
 1156? Stage 2 sep 
 1157? Stage 3 burn 
 1158? T+1:17:00? Stage 3 sep  662.08 1785 x 35784 x 20.6 
 1208? SES-4 depletion  1768 x 2639 x 25.2 
1992 Sep 4  2052? Star 30C burn  1446.59 35815 x 36167 x 0.1 GEO 153.7W+2.6W 
1992 Sep 7    1430.24 35470 x 35873 x 0.1 GEO 155.7W+1.4E 
1992 Oct 6    1436.08 35764 x 35808 x 0.1 GEO 135.1W 
1992 Nov 30    1436.06 35782 x 35789 x 0.1 GEO 135.0W 
1994 Jul 4    1436.06 35772 x 35799 x 0.1 GEO 135.1W 
1999 Jun 14    1436.05 35770 x 35801 x 0.1 GEO 135.0W 
2001   Transfer to SES 
2004 Jun   end active orbit maintenance  
2004 Aug 11    1436.06 35775 x 35796 x 0.3 GEO 135.0W 
2004 Oct 4   mv out  
2005 Jan 20   mv in  1436.09 35777 x 35795 x 0.7 GEO 84.8W 
2006 May 15    1436.11 35776 x 35797 x 1.9 GEO 84.7W 
2006 May 16   mv out 
2006 Jun 25   mv in 
2006 Aug 4    1436.05 35784 x 35786 x 2.1 GEO 105.7W 
2006 Sep 30    1436.10 35778 x 35794 x 2.3 GEO 104.9W 
2007 Feb 22    1436.11 35763 x 35808 x 2.7 GEO 104.6W

Thursday, October 25, 2007

Soyuz TMA-6 (Basalt)

 2005-013A


11F732 No. 216 on ISS Flight 10S, callsign Bazal't. Expedition 11 crew and EP-8 visiting crew of Roberto Vittori (ASI) on ENEIDE mission for ESA/ASI. Launch mass 7195 kg.

EP-8 backup was CSA's R. Thirsk.

At docking, the Soyuz rolled about 15 degrees and it took a while to damp down the motion.

Mass 7195 kg, BO 1244 kg and SA 2894 kg, prop in PAO 880 kg. Docking mass 6829 kg.

 


Soyuz TMA-6 
 

DateTimeEventOrbit  

2005 Apr 15 0046:25 Launch by Soyuz-FG 11A511U-FG No. 0014 
  T+1:53 SAS sep 
  T+1:57 St 1 sep 
  T+2:37 GO sep
  T+4:47 St 2 sep
  T+4:57 KhO sep 
 0055:10  T+8:45 St 3 MECO 
 0055:13 T+8:48 St 3 sep 
 0421:41 DV1 17m/s 45s  221 x 269 x 51.7 
 0441:55 DV2 5.6m/s 15s  232 x 270 x 51.6 
2005 Apr 16  0159:01  DV3 2,/s 6s  238 x 270 x 51.6 
2005 Apr 17  0023  DV4 SKD 24m/s 63s 
 0046  1.4m/s DPO 34s, range 198 km  
 0107  24m/s SKD 99 km range  
 0148  7m/s SKD 2.6m/s  
 0155  5m/s SKD range 1 km 
 0157  1.5m/s DPO Range 0.6 km 
 0202  Range 900m  
 0205  Flyaround 400 m  
 0208  Range 250 m 
 0210  Range 166 m, nadir and roll 
 0211  Stationkeep 161m 
 0212  Resume approach 
 0215  75m 
 0218  30m 
 0220  12m 
 0220:23  Soft Docking to Pirs 
  Docking complete 
 0445  Hatch open 
2005 Jul 19  1038:10  Undock Pirs 
  Back off 25 m 
 1107:59  Dock Zarya 
2005 Oct 10  1848  HC 
 2149:14  Undocking  346 x 348 x 51.6 
 2152  8s sep burn 
2005 Oct 11  0018:43  deorbit 115.2m/s 4:11  
 0043  modules sep  -40 x 348 x 51.6 
 0046  entry 
 0109:48  landing 57 km NE from Arkalyk 

USA-134

 1997-065A


B-13 was the first DSCS satellite to complete testing at Lockheed Sunnyvale following construction at Valley Forge. By 1996, the DSCS system customer was the MILSATCOM Joint Program Office at AF Space and Missile Systems Center, LAAFB.

Launch mass of combined DSCS and IABS was 2733 kg. The Falcon Gold experiment was attached to the Centaur stage.


DSCS III B-13 
 

DateTimeEventOrbit  

1997 Oct 25  0046  Launch by Atlas IIA Centaur AC-131 CC SLC36A 
 0048? T+2:44? Atlas BECO 
 0048? T+2:47? Atlas booster sep
  T+3:53? Fairing sep
  T+4:41? Atlas SECO 
 0050? T+4:43? Atlas sep 
 0051? T+5:00? Centaur MES-1 
 0056? T+10:07? Centaur MECO-1  150? x 900? x 29?  
 0108? T+22:17? Centaur MES-2 
 0109? T+23:43? Centaur MECO-2 
 0112  T+26:38 Centaur sep  619.1 316 x 35771 x 25.3 (UN) 
1997 Oct 30   IABS final burn  1424.9 35533 x 35602 x 0.0 (UN)

Tuesday, October 23, 2007

August 14,2001

 https://web.archive.org/web/20070807072543/http://digest-archive.degrassi.ca/DD134.htm

Rebels [and] chicks : a history of the Hollywood teen movie

 https://welib.org/md5/71b612282440fd3a960530e7d2d68286

You'll Never Nanny in This Town Again : The True Adventures of a Hollywood Nanny

https://welib.org/md5/80ad45012065a8b406162e68fcc842bd

Voyager 2

 1977-076A


Voyager SC3 (Voyager 2, VGR-2) was launched at 1429:44 on 1977 Aug 20 by Titan IIIE Centaur from LC41 at Cape Canaveral. Although it immediately encountered problems with its science boom and other systems, these were soon resolved and it would become probably the most successful probe ever, visiting four planets and revolutionizing our knowledge of the outer solar system.

The Centaur stage cutoff into an orbit with an aphelion of around 2.8AU. The VGR propulsion module - a Star 37 motor - fired to increase aphelion to 6.3AU.

The scan platform stuck during deployment; an attempt to shake it by jettisoning a dust cover failed when the command sent VGR-2 into safemode.

VGR-2 settled into Cruise mode on Sep 2, and made a TCM on Oct 11. However, the success of launch led to complacency and the Voyager program ran into management problems at this time, with operations errors nearly losing the vehicle. Many Voyager team members moved on to work on the future Galileo project, with Voyager project manager John Casani's attention had been split between Voyager and Galileo Bob Parks was brought in to take over Voyager full-time in April 1978, soon after a crisis in which the main radio receiver switched to the backup when no message was sent to the spacecraft for over a week. A capacitor in the backup shorted, but when controllers ordered a switch back to the main reciever it failed permanently, and a week later the backup cut back in, to be used thereafter.

The first Jupiter imaging was done on 1979 Apr 24, with Jupiter Observatory Phase starting in May 1979. TCMs on May 26 and Jun 27 were made before encounter on Jul 9. TCM5, 6 and 7 were made on Jul 9, Jul 23 and 1981 Feb 26.

The Saturn Observatory Phase began on 1981 Jun 5. TCM-8 on Jul 19 and TCM-9 on Aug 18 set up the final encounter geometry. Far Encounter phases 1 and 2 began on Jul 31 and Aug 11 respectively, with Near Encounter on Aug 25. Periapsis was at 0324 on Aug 26. Voyager 2 crossed the ring plane at the G ring at 0415. The scan platform failed at 0514 on Aug 26, but most of the imaging had been taken. A Saturn Post Encounter phase lasted from Aug 27 to Sep 28.

Voyager 2 was now on course for Uranus. TCM-10 (1981 Sep 29), TCM-11 (1984 Nov 13), and another TCM on 1985 Dec 24 set up the encounter, which happened on 1986 Jan 26. The results were eclipsed by the loss of the Space Shuttle Challenger two days later.

During the Neptune cruise phase, TCM B15 (1987 Mar 13), TCM B16 (late 1988), TCMB17C (1989 Apr 20), TCM B18 (about 1989 Aug 1) and TCM B20 (1989 Aug 21) set up the accurate flyby. The Neptune Observatory Phase began on Jun 5, and transitioned to Far Encounter on Aug 6 and Near Encounter on Aug 24. Voyager 2 encountered Neptune at a distance of 4h 6min from Earth. At 2356 on Aug 24, it passed 4.6 million km from Nereid; at 0253 on Aug 25 it crossed the Neptune ring plane inbound. Closest approach to Neptune was 4905 km at 0355. The ring plane was traversed outbound at 0514, and Voyager 2 made its final flyby, of Triton, at a distance of 38360 km on 1989 Aug 25 at 0919. A Neptune Post Encounter phase from Aug 20 to Oct 2 marked the end of the Voyager outer planets exploratory mission. Voyager now began the search for the heliopause - the boundary between the solar system and interstellar space. Beginning of the Voyager Interstellar Mission was declared on 1990 Jan 1. By 1992 Oct 9, Voyager 2 was 38 AU from the Sun.

In 1999, five experiments were still operating: the CR, LEPI, PSI, PWI, and MAG.


Voyager 2 
 

DateTimeEventOrbit  

1977 Aug 20  1429:44  Launch by TC  CC LC41 
  T+1:50 SRM cutoff 
  T+1:51 St 1 burn 
  T+2:02 SRM sep 
  T+4:15 St 1 MECO 
  T+4:15 St 1 sep, St 2 MES 
  T+4:26 CSS jettison 
  T+7:44 St 2 MECO 
  T+7:50 St 2 sep 
  T+8:01 TC MES-1  
 1439:25 T+9:48 TC MECO-1  167 x 167 x 37.6 
  T+53:00? Science boom deploy failed 
 1523:20 T+53:36 TC MES-2 
 1527:52 T+59:16 TC MECO-2  195 x -29536 x 41.87 
 1530:42 T+1:02:06 TC sep 
  T+1:02:08 TC avoidance 
 1530:58 T+1:02:21s PMI burn 
 1531:40 T+1:03:06 PM burnout  326 x -20835 x 41.86 
 1543:01 T+1:12:33 PM sep 
 1937  VGR pass EL1:4 
 2050  Centaur pass EL1:4 
1977 Aug 21  0200  VGR pass lunar orbit 
1977 Aug 21  1600? VGR exit SOI/929 at Vinf=10.14 km/s 
1977 Aug 22  0824 VGR exit SOI/L1 
1977 Aug 22  0300?  Centaur exit Earth SOI (929k) at Vinf = 6.93 km/s  1.02 x 3.02 AU x 3.7 deg? 
1977 Aug 23  0215?  Centaur exit Earth Hill sphere per orbit soln 
1977 Aug 26   Attempt to jettison IRIS cover aborted  
1977 Aug 29   IRIS cover jettisoed 
1977 Sep 2   Begin cruise 
1977 Oct 11   TCM B-1 
1978 Apr   Main radio receiver fail 
1978 May 3   TCM B-2 
1979 Apr 24   First Jupiter image 
1979 Apr 30  1830? Enter Jupiter sphere 
1979 May 1   48M km from Jupiter 
1979 May   Jupiter Observatory Phase 
1979 May 26   TCM B-3 
1979 Jun 27   TCM B-4 
1979 Jul 8   Jupiter Near Encounter 
1979 Jul 8  1313  Callisto, 214930 km C/A 
1979 Jul 9  0806  Ganymede, 62130 km C/A 
 0850  Max earth-rel velocity 55.91 km/s 
 1843  Europa, 205720 km C/A 
 2030?  Amalthea 558370 km C/A 
 2229:00  Jupiter, 650178 km (721670 km C/A) 
1979 Jul 9   TCM B-5 peri+2hr, 76min 
1979 Jul 23   TCM B-6 
1979 Aug 5   Cruise phase 
1979 Sep 18  0240?  Exit Jupiter sphere 
1979 Sep 23   48Mkm from Jupiter 
1981 Feb 26   TCM B-7 
1981 Jun 5   Saturn Observatory Phase, 77 Mkm 
1981 Jun 18  2000? Enter Saturn sphere 64.5M 
1981 Jun 22   55 Mkm from Saturn 
1981 Jul 19   TCM B-8 
1981 Jul 31   Saturn Far Encounter 1 
1981 Aug 11   Saturn Far Encounter 2 
1981 Aug 18   TCM B-9 
1981 Aug 25   Saturn Near Encounter 
1981 Aug 23  0127  Iapetus, 908680 km C/A 
1981 Aug 25  0125  Hyperion 471370 km C/A  
1981 Aug 25  0937  Titan 666190 km C/A 
 2258  Helene, 270000 km C/A 
1981 Aug 26  0105  Dione, 502310 km C/A 
 0222  Calypso, 200000? km C/A 
 0234  Mimas, 309930 km C/A 
 0308  Atlas, 287000 km C/A 
 0319  Pandora, 107000 km C/A 
1981 Aug 26  0324  Saturn, 100800 km 
 0333  Prometheus, 247000 km C/A 
 0345  Enceladus, 87010 km C/A 
 0350  Janus, 223000 km C/A 
 0406  Epimetheus, 147000 km C/A 
 0415  Ring plane crossing, in G ring 
 0440  Max earth-rel velocity, 61.7 km/s 
 0514  Scan platform fail 
 0603  Telesto, 300000 km? 
 0612  Tethys, 93010 km C/A 
 0629  Rhea, 645260 km C/A 
1981 Aug 27   Saturn Post Encounter 
1981 Sep 4  0130? Phoebe, 2075640 km C/A 
1981 Sep 28   Cruise Phase 
1981 Sep 29   TCM-10 
1981 Nov 2  1030?  64.5M exit Saturn SOI 
1981 Nov 10   55Mkm exit Saturn SOI 
1984 Nov 13   TCM-11 
1985 Nov 4   Uranus Observatory Phase 103 Mkm 
1985 Dec 1  0430?  69.6M enter U SOI 
1985 Dec 24   TCM-12? 
1985 Dec 31   Uranus SOI 
1986 Jan 24   Uranus near encounter 
 1530? Titania, 365200 km C/A 
 1600? Oberon, 470600 km C/A  
 1700? Ariel, 127000 km C/A 
1986 Jan 24  1730? Miranda, 28260 km C/A 
1986 Jan 24  1759 Uranus 81541 km (71000 km old) (107100 km C/A) 
 1800? Umbriel, 325000 km C/A 
1986 Feb 25   Cruise phase 
1986 Mar 20  0630? Leave Uranus Sphere 69.6M 
1987 Mar 13   TCM B15 
1988 late   TCM B16 
1988 Nov 11   TCM B17B 0.45 km/s 
1989 Apr 20   TCM B17C 0.3 km/s 
1989 Jun 5   Neptune Observatory Phase 
1989 Jun 6  1200  N Sphere 115.2M 
1989 Jun 30   Neptune SOI 87Mkm 
1989 Aug 1   TCM B18 0.92 km/s 
1989 Aug 6   Neptune Far Encounter 
1989 Aug 21   TCM B20 0.47 km/s 
1989 Aug 24   Neptune Near Encounter 
 2356  Nereid, 4.6Mkm 
1989 Aug 25  0253  Ring plane inbound 
1989 Aug 25  0356  Neptune, 4476 (old 4905 km) (29242+-2 km C/A)  
 0514  Ring plane outbound 
 0910  Triton, 38360 km (39780+-20 km C/A) 
1989 Aug 26   Post Encounter 
1989 Oct 2   Cruise 
1989 Oct 25   Leave Neptune SOI 
1989 Nov 12  2000? Leave Neptune sphere 115.2M 
1990 Jan 1   Voyager Interstellar Mission 
1998 Nov 12   Comms lost 
1998 Nov 14   Comms restored 
1998 Nov   Scan platform turned off 
1999 Feb 1   OWLT 16 hr 
2007 Aug 30   First helioshock pass at 84AU 

Payload:

  • MHW RTG

  • Imaging TV cameras (2), 1500mm f/8.5 narrow angle, 200mm f/3 wide angle

  • UVS Ultraviolet spectrometer 534-1701A Plasma spectrometers

  • IRIS IR spectrometer/radiometer

  • LEPI Low energy charged particle analyser/telescope

  • Multifilter photometer 2200-7300A, 8-in, F/1.1 scope

  • Triaxial fluxgate magnetometers

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