Wednesday, February 23, 2011

Insat 4C

 2007-037A


Launch by GSLV in Sep 2007. At 83s after launch a control actuator stuck and roll rates built up, causing premature SOM shutdown with a 120m/s underspeed. The inertial measurement unit lost reference as well, and as a result the insertion inclination was 15.8 deg instead of the planned value, presumably 19.5 deg, and the apogee was low. The payload was able to make up the insertion errors.

Mass is 2130 kg full 941 kg dry. Size is 1.6 x 1.5 x 2.4m box + 2 panels span 9.5m.


Insat 4C
 

DateTimeEventOrbit  

2007 Sep 2 1250  Launch by GSLV F04  SDSC 
  T+1:23 L40 strapon actuator failure 
  SOM shutdown 
  T+2:29 GS1 burnout 70 km 
  T+3:47 Fairing sep 115 km 
  T+4:52 GS2 burnout 
 1306 T+16:42 GS3 burnout 220 km  
 1306 T+16:55 GS3 sep  555.17 174 x 31821 x 15.8  
2007 Sep 3  0247  LAM-1 27min  2983 x 31702 x 11.1  
   2981 x 35721 x 11.1 
2007 Sep 4  2305 LAM-3 3140s burn  15994 x 35385 x 3.2 
   15993 x 35384 x 3.2 
2007 Sep 6  0700s LAM-4  1340.93 32579 x 35226 x 0.3  
2007 Sep 7  1530? LAM-5 
2007 Sep 14    1428.15 35026 x 35226 x 0.3 GEO 27.3E+25.6E/d 
2007 Sep 15    1436.07 35769 x 35803 x 0.1 GEO 73.9E 
2007 Oct 10    1436.07 35772 x 35799 x 0.1 GEO 74.1E 
2010 Nov 4    1436.12 35758 x 35815 x 0.05 GEO 73.7E 

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