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 offnominal 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 offnominal 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