Wednesday, August 12, 2015

O3b 1

 2013-031D


O3b Networks Ltd, Jersey, Channel Islands. "O3b" means 'the other 3 billion' humans with no broadband access. O3b's operational hq is in Den Haag next door to SES World Skies. MEO sat 700 kg. Total mass 2800 kg, plus 404 kg adapter. 7825 x 7825 km x 0 deg.


O3b 
 

DateTimeEventOrbit  

2013 Jun 25  1927:03 Launch by 372RN21B No. E15000-003 (VS05) 
  T+1:58 strapon sep 
  T+3:29 Fairing sep
 1931 T+4:48 Blok A sep 
  Blok I burn 
 1936 St 3 MECO 

 

1936:26 T+9:23 St 3 sep  -1167 x 192 x 5.27 
 1937:29 T+10:23 MES-1 
 1941:23 T+14:20 MECO-1  153 x 227 x 5.15  

 

1949:53 T+22:50 MES-2 
 1958:25 T+31:22 MECO-2  242 x 7875 x 3.24  
 2119:28 T+1:52:25 MES-3 
 2124:30 T+1:57:27 MECO-3  7831 x 7835 x 0.02  
 2127:50 T+2:00:47 SC2/SC4 sep 
 2143:05 MES-4 preburn 10s? 
 2143:23? MES-4  
 2144?  T+2:16:03 MECO-4 
 2149:30 T+2:22:27 SC1/SC3 sep 
 2204MES-5 
 2206MECO-5  
 2239MES-6 
 2242MECO-6  
  Ascend to mission orbit T+2d to T+10d 

Sunday, August 9, 2015

SARAL

 2013-009A


'Satellite with ARgos and ALtiKa', a joint ISRO CNES mission with the Altika altimeter. Saral also means 'simple' in Hindi. CNES is overall mission manager. ISRO supplies the spacecraft bus and the launch vehicle and carries out spacecraft commanding.

Gap filler between Envisat and Sentinel-3 using ISRO SSB (IMS-2 Small Satellite Bus). Mass 346 kg. Box + 2 panels size 1.0 x 1.0 x 0.7m, span around 3.0m? Mono RCS with 1N thrusters and 21 kg propellant.

AltiKa replaces Envisat RA2 altimeter and work with Jason-2.  

SARAL is mounted on the DLA-U; NEOSSAT and Sapphire inside. Strand-1 and the NLS-8 satellites are mounted on the second stage forward adapter.

Azmuth 147 in early flight, 178 during PS3 coast.


SARAL 
 

DateTimeEventOrbit  

2013 Feb 25  1231  Launch by PSLV-CA C20  SHAR 
  T+1:53 PS1 sep 52 km 
  T+1:53 PS2 burn 
  T+2:58 HS sep, 116 km 
  T+4:25 PS2 sep 222 km 
  T+4:26 PS3 burn 224 km 
  T+6:40? PS3 burnout 
 1239 T+8:40 PS3 sep 582 km 
 1239 T+8:51 PS4 burn 593 km  
 1248 T+17:20 PS4 cutoff 789 km 
 1248 T+17:58 SARAL sep 
 1249 T+18:28 DLA-U sep 
 1249 T+18:58 SAPPHIRE sep 
 1250 T+19:23 NEOSSat sep 
 1251 T+20:12 AAUSAT 3 sep 
 1251 T+20:52 BRITE sep 
 1252 T+21:12 UniBRITE sep 
 1252 T+21:42 STRAND sep 
2013 Mar 1    100.45 771 x 788 x 98.6 
2013 Mar 15   Op orbit reached 100.54 783 x 785 x 98.5 
2013 Dec 5    100.54 783 x 785 x 98.5 

Payload:

  • AltiKA altimeter, Ka-band, 35.75 GHz. 8 km res (CNES/)

  • DORIS Precise orbit determination (CNES/)

  • LRA Laser Retroreflector array (CNES/)

  • Argos-3 Data Collection System

October 1,2026

  https://planet4589.org/space/jsr/back/news.860.txt