Friday, August 9, 2013

Dragon CRS-2

 2013-010A


In trunk, two Heat Rejection System Grapple Fixtures to be installed on the MBS POA. Attached to P1 and S1 radiators in EVA-19.

Up cargo 677 kg including 102 kg packaging. Down cargo 1370 kg (1210 kg pay plus 160 kg packaging).

Launch mass 8830 kg; 7846 kg on Mar 2, 7656 at docking; 8182 kg after undocking.

At stage 2 separation, 3 of 4 Dragon oxidizer tanks failed to pressurize and solar array deploy was delayed in the absence of attitude control, with only Quad 1 operational. Cycling of helium isolation valves cleared the blockage in Quad 4, allowing solar array deploy. Quad 2 and 3 recovered over a 2 hour period.


CRS2 
 

DateTimeEventOrbit  

2013 Mar 1  1510:13  Launch by Falcon 9 V1.0  CC SLC40 
 1513  T+2:55 MECO 
  T+3:05 St 1 sep 
  T+3:12 St 2 burn 
 1513 T +3:52 Nose cone sep 
  T+9:19 SECO199 x 323 x 51.66  
 1519  T+9:46? St 2 sep
 1522 T+12m Solar array deploy fails 
 1540? Solar array deploy  89.76 203 x 321 x 51.7  
 2100? All thruster pods active 
 2137 Draco test burn 30s 5.05m/s  
 2205  Coelliptic Orbit raising burn 4 min 35.8 m/s  91.09 314 x 340 x 51.7  
2013 Mar 2  0011 Orbit raise HA 18.4m/s 91.80 321 x 404 x 51.7 
 0056 Orbit raise CE1 19.7m/s  92.51 391 x 403 x 51.7  
 0530?  Orbit change  92.97 332 x 507 x 51.7 
 1100? Orbit change  93.37 433 x 445 x 51.7 
2013 Mar 3  0840  At 350m point 
 0905  Range 250m 
 0906  Resume approach 250m 
 0933  Range 140m 
 1000  30m hold point 
 1006  30m approach resume 
 1022  At capture point 
 1030  1m from capture 
 1031  Capture  
 1340  RTL 
 1345  First stage capture 
 1356  Final berthing at Harmony nadir CBM 
 1814  HO 
2013 Mar 4?  SSRMS ungrapple Dragon 
2013 Mar 6    
 2000? SSRMS grapple HRSGF 
 2004  SSRMS unberth HRSGF 
 2104  SSRMS berthing HRSGF on MBS POA - range less than 1 m 
 2220?  Ungrappled and moving away 
2013 Mar 22  s  SSRMS grapple Dragon 
2013 Mar 26  0810  Unberth 
 1056:00  Release 
 1059  Sep-1 burn 
 1101  Sep-2 burn 
 1108  Sep-3 burn 
 1109  Depart KOS 
 1425s GNC door close 
 1542:33  Deorbit near 26S 75W 9:59 
 1552:32s  Deorbit complete 
 1555s  Trunk sep 
 1614s  Entry 
 1623s  Drogue parachute deployed
 1624s  Main parachute deployed
 1634:06  Splashdown near 30.5N 120.1W 

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