Integ Time Line Team - REV 15 BASELINE 3/10/2003 8 PM
Note: Rev 15 BASELINE corrects typo's, adds S-Band comm drop out data, adds new debris observations, & references QBAR, Mach no., & predicted Wing Leading Edge Stagnation temps
Rev 15 was baselined by the OVE Working Group Team as of 3/10/03.
Sum GMT Milestone Entry Event Remarks MSID
No. GMT Day 32          
1 13:10:39 TIG-5 APU 2 Start      
2 13:15:30 TIG OMS TIG      
3 13:18:08   OMS End of Burn      
4 13:31:25 EI-13 APU 1 Start      
5 13:31:29   APU 3 Start      
6 13:44:09 EI Entry Interface (400,000 ft) Mach 24.57    
6.3 13:49:32   Start of initial roll      
QBAR = ~15 psf (~0.10 psi); Mach 24.4 ------ 32:13:50:00 ------     EI + 351 sec; WLE Stagnation Temp: ~2520 F (STS-107 Nom EOM Design Pred)
6.5 13:50:00 / 43   Five events of unexpected return link comm drop-out (Comm events 1-5) On upper left aft antenna (TDRS 171/W). Appears off-nominal based on previous flt data. Comm loss not continuous thru period indicated.    
7 13:50:53 Start of Peak Heating   Determined by analysis    
QBAR = ~19 psf (~0.13 psi); Mach 24.1 ------ 32:13:51:00 ------     EI + 411 sec; WLE Stagnation Temp: ~2650 F
7.3 13:51:19 / 13:52:49   Remote sensors indicate off-nominal external event L2L, L3L, and R2R jet firings occurred near event. n/a  
7.35 13:51:46   Inertial Beta goes and stays Negative until LOS   V90H2249C  
QBAR = ~22 psf (~0.15 psi); Mach 23.7 ------ 32:13:52:00 ------     EI + 471 sec; WLE Stagnation Temp: ~2700 F
7.4 13:52:05   First clear indication of off-nominal aero increments Delta yawing moment coefficient only (as compared to nominal aero). Derived by analysis. n/a  
7.45 13:52:09 / 55   Four events of unexpected return link comm drop-out (Comm events 6-9) On upper left aft antenna (TDRS 171/W). Appears off-nominal based on previous flt data. Comm loss not continuous thru period indicated.    
7.5 13:52:17
Approx Vehicle Ground Location:
39.0 N / -129.2 W
Altitude 236,800 ft / Mach 23.6 - Over the Pacific Ocean, approx 300 miles West of California Coastline Approx vehicle position when first off-nominal data was seen; Data source: STS-107 GPS Trajectory Data    
8 13:52:17 / 52:41   LMG Brake Line Temps (D, A, C) (3) - start of off nominal trend Unusual Temperature Increase V58T1703A
V58T1700A
V58T1702A
8.5 13:52:32/55   Supply H2O Dump Nozzle Temps (A, B) (2) and Vacuum Vent Temp (1) - transient (15 to and 23 seconds, respectively) increase in typical rise rates. GMT shown indicates initial rise duration. Supply H2O Dump Nozzle temps took additional 48 secs to return to nominal temp rise, vacuum vent temps took additional 40 secs to return to nominal rise. V62T0440A
V62T0551A
V62T0439A
9 deleted          
10 13:52:59   Left INBD Elevon Lower Skin Temp (1) - OSL Began trending down 3 secs earlier V09T1006A  
QBAR = ~25.5 psf (~0.18 psi); Mach 23.2 ------ 32:13:53:00 ------     EI + 531 sec; WLE Stagnation Temp: ~2800 F
10.5 13:53:01   First clear indication of off-nominal rolling moment increment Start of steady (-) growth in roll moment. Derived by analysis. n/a  
11 13:53:10 / 36   Hydraulic System Left Outbd / Inbd Elevon Return Line Temps (4) - OSL OSL was preceded by Nominal Temp rise. V58T0394A
V58T0157A
V58T0193A
V58T0257A
11.1 13:54:24   Start of Alpha Modulation   V90H0803C  
11.2 13:53:26 Approx Veh Grd Location:
38.7 N / -123.5 W
Altitude 231600 ft / Mach 23.0 - Crossing the California Coastline Data source: STS-107 GPS Trajectory Data    
11.3 13:53:32 / 54:22   Two events of unexpected return link comm drop-out (Comm events 10-11) On upper left aft antenna (TDRS 171/W). Appears off-nominal based on previous flt data. Comm loss not continuous thru period indicated.    
11.5 13:53:44 / 54:11   1st reported debris (5) observed leaving the Orbiter just aft of Orbiter envelope (Debris # 1 thru 5) EOC video # EOC2-4-0026, 0056, & 0064. No evidence of jet firings near events. n/a  
QBAR = ~29 psf (~0.20 psi); Mach 22.7 ------ 32:13:54:00 ------     EI + 591 sec; WLE Stagnation Temp: ~2850 F
12 deleted          
13 13:54:10 / 55:12   Left Main Gear Brake Line Temp B (1) / Strut Actuator Temp (1) / Sys 3 LMG Brake Sw Vlv Ret Line Temp (FWD) (1) - start of off nominal trend Unusual Temperature Increase V58T1701A
V58T0405A
V58T0842A
14 13:54:20   Start of slow aileron trim change; Reversal in trend of derived rolling moment coefficient. GMT is approximate (+/- 10 sec) for aileron. Observed roll moment changed from a negative to positive slope. Derived by analysis. V90H1500C  
15 13:54:22   Mid Fuselage LT BondLine Temp at x1215 (1) & LH Aft Fus Sidewall Temp at x1410 (1) - start of off nominal trend Unusual increase in temperature rise rate V34T1106A
V09T1724A
 
15.3 13:54:33.3 / 37   Flash #1 - Orbiter envelope suddenly brightened (duration 0.3 sec), leaving noticeably luminescent signature in plasma trail; plus Debris # 6 - report of very bright debris observed leaving the Orbiter just aft of the Orbiter envelope. EOC video # EOC2-4-0026, 0034, & 0009B. R3R and R2R jet firings occurred near events. Debris events 6 & 14 are visually the biggest, brightest events & therefore may indicate the most significant changes to the Orbiter of the western debris events. n/a  
QBAR = ~34.5 psf (~0.24 psi); Mach 22.1 ------ 32:13:55:00 ------     EI + 651 sec; WLE Stagnation Temp: ~2900 F
15.35 13:55:04 / 55:30   Debris # 7 thru 10 observed leaving the Orbiter just aft of Orbiter envelope. Debris #8 event was followed by momentary brightening of plasma trail. Debris #9 event was followed by multiple secondary plasma trails. EOC video # EOC2-4-0005, 0017, 0021, 0028, and 0030. No evidence of jet firings near events. n/a  
15.4 13:55:30   Remote sensors indicate off-nominal external event GMT is approximate. Preliminary match to debris shedding seen in video #10 (Ivins, UT). No evidence of jet firings near event. n/a  
15.43 13:55:33 / 56:03   Two events of return link comm drop-outs (Comm events 12 & 13) On upper right aft antenna (TDRS 171/W). Uncertain if off-nominal based on previous flight data. Comm loss not continuous thru period indicated.    
15.45 13:55:36 / 56:13   Debris # 11 thru 15 observed leaving the Orbiter just aft of Orbiter envelope. Debris #12 event was preceded and followed by secondary plasma trails. Debris #13 event was followed by momentary brightening of plasma trail adjacent to debris. Debris #14 event consisted of very bright debris observed leaving the Orbiter. EOC video # EOC2-4-0005, 0017, 0021, 0028, 0030, and 0050. No evidence of jet firings near events. (Nearest jet firings occur at 56:17.) Debris events 6 & 14 are visually the biggest, brightest events & therefore may indicate the most significant changes to the Orbiter of the western debris events. n/a  
15.5 13:55:41   Mid Fuselage Port (Left) Sill Longeron Temp at X1215 - start of off nominal trend Unusual Temperature Increase V34T1118A  
QBAR = ~40 psf (~0.28 psi); Mach 21.4 ------ 32:13:56:00 ------     EI + 711 sec; WLE Stagnation Temp: ~2900 F
16 13:56:03 / 56:24   Left Lower/Upper Wing Skin Temps - Trending down (2) Indication of potential measurement failures V09T1002A V09T1024A
16.5 13:56:16 / 56:53   Hyd Sys 1 LMG Uplock Actuator Unlock Line Temp; Sys 3 LMG Brake Sw Vlv Ret Line Temp (FWD); LMG Brake Line Temp C; LMG Brake Line Temp B; Sys 3 Left Main Gear Strut Actuator Temp - all show a temp rise rate change. Significant increase in temp rise rate on all four lines V58T0125A V58T0842A V58T1702A V58T1701A V58T0405A
16.55 13:56:30 / 55   First Roll Reversal initiation / completion Mach 21.13 - 20.76 V90H1044C  
16.6 13:56:55 / 57   Return link comm drop-out (Comm event 14) On upper right aft antenna (TDRS 171/W). Uncertain if off-nominal based on previous flight data.    
QBAR = ~42 psf (~0.29 psi); Mach 20.7 ------ 32:13:57:00 ------     EI + 771 sec; WLE Stagnation Temp: ~2900 F
16.7 13:57:19 / 24   MLG LH Outbd Tire Pressures 1 & 2 - start of small increase in pressures Not seen in previous flights V51P0570A V51P0572A
16.8 13:57:19 / 58:01.5   Debris # 16 (very faint debris) observed leaving just aft of Orbiter followed by two events of asymmetrcial brightening of the Orbiter shape (Flares 1 and 2) occurred over NM Debris #16: EOC video # EOC2-4-00148-2. Flares #1 & 2: EOC2-4-00148-4. Observations by personnel from the Starfire Optical Range (Kirtland Air Force Base, NM). n/a  
17 13:57:28 / 43   Left Lower/Upper Wing Skin Temps (2) - OSL   V09T1002A V09T1024A
             
18 deleted          
19 13:57:54   Sys 2 LH Brake Sw Vlv Return Temp (1) Unusual Temperature Increase V58T0841A  
QBAR = ~52.5 psf (~0.36 psi); Mach 19.8 ------ 32:13:58:00 ------     EI + 831 sec; WLE Stagnation Temp: ~2880 F
20 13:58:03   Start of sharp aileron trim Increase GMT is approximate (+/- 10 sec) V90H1500C  
20.5 13:58:09   Increase in derived rolling and yawing moment increments Substantial increase in observed growth rate of both roll and yaw moment increments. Derived by analysis. n/a  
21 deleted          
22 deleted          
22.5 13:58:16   LMG Brake Line Temp D - Temp rise rate change Significant increase in temp rise rate. V58T1703A  
23 13:58:32 / 54   MLG LH Inbd / Outbd Tire Pressures (4) - Decay to OSL   V51P0570A
V51P0571A
V51P0573A
V51P0572A
24 deleted          
25 13:58:39 / 48   MLG LH Inbd/Outbd Wheel Temps (2) - OSL   V51T0574A V51T0575A
25.5 13:58:40   BFS Fault Msg (4) - Tire Pressures - 1st Message      
26 13:58:56   BFS Fault Msg (4) - Tire Pressures - Last Message      
QBAR = ~63.5 psf (~0.44 psi); Mach 18.7 ------ 32:13:59:00 ------     EI + 891 sec; WLE Stagnation Temp: ~2850 F
             
27 13:59:06   Left Main Gear Downlocked Indication - Transferred ON   V51X0125E  
27.5 13:59:23   Loss of MCC real-time data to the workstations in the FCR and MER      
28 13:59:30.66 / 30.68   Start of two yaw jets firing (R2R and R3R) Fired continuously until end of data at 13:59:37.4 V79X2634X V79X2638X
29 13:59:31   Observed elevons deflection at LOS Left: -8.11 deg (up) Right: -1.15 deg (up)    
29.3 13:59:31.4 / 34.5   Several events and PASS and BFS FSM messages during this time period all indicate the failure signature of ASA 4 ASAs responded appropriately. However, signature is indicative of failure of ASA 4. V57H0253A
(5 Hz)
 
             
29.5 13:59:32   Observed aileron trim at LOS -2.3 degrees    
30 deleted          
31 deleted          
32 deleted          
32.5 13:59:32 Approx Veh Grd Location:
32.9 N / -99.0 W
Altitude ~200700 ft / Mach ~18.1 - Near Dallas TX Approximate Vehicle Ground Location at Loss of Signal based on GMT; Data source: STS-107 GPS Trajectory Data n/a  
33 13:59:32.136 LOS Last valid downlink frame accepted by ODRC - OI / BFS / PASS. Start of reconstructed data. Nominal loss of comm at this GMT (for ~15 sec max based on previous flt data)    
34 deleted          
35 13:59:35/36   Sideslip on vehicle changes sign. The event occurred between the two times listed. Aerodynamic forces due to sideslip are now reinforcing aerodynamic asymmetry. n/a  
36 13:59:36   Growth in Bank attitude error Up until this time the flight control had been able to maintain the Bank error around 5 deg.    
37 13:59:36.8   Aerojet DAP Requests Third Right Yaw RCS Jet (R4R) This additional jet is required to counteract the increasing aerodynamic moments on the vehicle. Fired continuously until end of data at 13:59:37.4    
38 13:59:37.3   Aerojet DAP Requests Third Right Yaw RCS Jet (R1R) This additional jet is required to counteract the increasing aerodynamic moments on the vehicle. Fired continuously until end of data at 13:59:37.4    
39 13:59:37.n   Last aileron data The aileron position is now approx -5.2 deg with approx -2.5 deg of aileron trim. The rate of change of aileron trim had reached the maximum allowed by the flight control system.    
40 13:59:37.396 End of 5-second period of reconstructed data End of first 5-seconds of the 32-second period of post-LOS data. Start of approximately 25 seconds of no data available GMT derived by MER data personnel n/a  
41 13:59:46.347 /
14:00:01.900*
  PASS Fault Message annunciation - ROLL REF
PASS Fault Message annunciation - L RCS LEAK
BFS Fault Message annunciations - L RCS LEAK (2)
*Time info corrupted on some of the events.    
QBAR = nn psf; Mach nn   ------ 32:14:00:00 ------     EI + 951 sec; WLE Stagnation Temp: ~2800 F
42 14:00:02/06   Debris A observed leaving the Orbiter - Large debris seen falling away from the Orbiter envelope. EOC videos # EOC2-4-0024, EOC2-4-0018 & EOC2-4-0118 n/a  
43 14:00:02.654   PASS Fault Message annunciation - L RCS LJET      
44 14:00:02.660 Beginning of 2-second period of reconstructed data Start of last 2-seconds of the 32 second period of post-LOS data.      
      During this final 2 second period of reconstructed data, the data indicates the following systems were nominal: APUs were running and WSB cooling was evident. MPS integrity was still evident. Fuel cells were generating power and the PRSD tanks/lines were intact. Comm and navaids systems in the forward fuselage were performing nominally. RSB, Body Flap, main engine, and right wing temps appeared active. ECLSS performance was nominal.    
      During this final 2 second period of reconstructed data, the data indicates the following systems were off-nominal: All three Hyd systems were lost. The left inbd/outbd elevon actuator temps were either OSL or no data exists. Majority of left OMS pod sensors were either OSH or OSL or no data exists. Elevated temps at bottom bondline centerline skin forward and aft of the wheel wells and at the port side structure over left wing were observed. EPDC shows general upward shift in Main Bus amps and downward shift in Main Bus volts. AC3 phase A inverter appeared disconnected from the AC Buss.    
      GNC data suggests vehicle was in an uncommanded attitude and was exhibiting uncontrolled rates. Yaw rate was at the sensor maximum of 20 deg/sec. The flight control mode was in AUTO. (Note that all Nav-derived parameters (e.g., alpha) are suspect due to high rates corrupting the IMU state.)    
45 14:00:03.470 /
14:00:03.637*
  BFS Fault Message annunciation - L OMS TK P
BFS Fault Message annunciation - In-determinant
BFS Fault Message annunciation - SM1 AC VOLTS
PASS Fault Message annunciation - L RCS PVT
* Time info corrupted on some of the events.    
46 14:00:03.637   PASS Fault Message annunciation - DAP DOWNMODE RHC The s/w process which logs the PASS message runs every 1.92 seconds, so this event could have occurred as early as 14:00:01.717 GMT. However, during the 2 sec period, available vehicle data indicates RHC was in detent and DAP was in AUTO.    
47 14:00:04.826 End of 2-second period of reconstructed data Last identifiable OI Downlink frame   n/a  
48 14:00:17 / 22   Debris B and C observed leaving the Orbiter EOC videos # EOC2-4-0024 & -0118 (for both B and C) n/a  
49 14:00:21 / 25   Vehicle Main Body break-up EOC videos # EOC2-4-0024, -0018 &-0118 n/a  
             
50 14:00:53 End of Peak Heating   Determined by analysis    
             
  = Nominal/Expected Event or Performance