|
12:00 |
Countdown Begins |
|
12:00 |
MLP Clear of non essential personnel |
|
12:00 |
Launch Pad Environmental Control System Preps |
|
12:00 |
Nitrogen Purge |
|
12:00 |
Weather Briefing |
|
12:00 |
Search Light Power Up |
|
12:00 |
SLC41 warning lights on |
|
08:30 |
Atlas System Start in preparation for Tanking |
|
08:30 |
Instrument Checks |
|
08:30 |
Lox System Preparations |
|
08:30 |
Gas Detection System Preparations |
|
08:30 |
Internal Battery Checks |
|
08:30 |
LH2 System Preparations |
|
07:05 |
Set Roadblocks |
|
07:00 |
Atlas V Power-Up |
|
05:25 |
Weather Briefing |
|
05:15 |
Communication Checks |
|
05:15 |
C-Band Communication Checks |
|
04:50 |
Weather Balloon Release |
|
04:20 |
S-Band Communication Checks |
|
04:00 |
L-4HR Commanding |
|
04:00 |
Polls |
|
03:35 |
Initiation of Nitrogen Flow |
|
03:34 |
Set Spacecraft Clock |
|
03:00 |
SLC Clear of all Personnel |
| 02:00 |
03:00 |
Launch Conductor Briefing on Vehicle Conditions |
| HOLDING |
02:40 |
GO/No GO for Tanking Poll |
| 30min Hold |
02:33 |
Pre-Test Tanking Briefing |
| 02:00 |
02:30 |
Centaur LOX Tank Chilldown |
| COUNTING |
02:30 |
Atlas LOX Vault & MLP Chilldown |
|
02:30 |
Centaur Helium Storage Bottle Pressurization |
|
02:30 |
Atlas Pressure Vessels Charge |
|
02:30 |
Atlas V RP-1 Fuel Tank Press |
| 01:55 |
02:25 |
Safe Arm Device Cycle Test |
| 01:50 |
02:20 |
Centaur LOX Transfer Line Chilldown |
| 01:45 |
02:15 |
Launch Hazard Area in Effect |
| 01:43 |
02:13 |
Centaur LOX Tanking begins |
| 01:40 |
02:10 |
Weather Balloon Release |
| 01:33 |
02:03 |
Centaur LH2 Tank Press to Chilldown Level |
| 01:30 |
02:00 |
Atlas V LOX Tanking begins |
| 01:25 |
01:55 |
Centaur LOX at 75% |
| 01:25 |
01:55 |
Centaur LH2 Transfer Lines Chilldown |
| 01:20 |
01:50 |
Centaur LH2 Loading |
| 01:00 |
01:30 |
Centaur Engine Chilldown |
| 00:55 |
01:25 |
Flight Control Final Preparations for Hydraulic Press |
| 00:45 |
01:15 |
Main Engine Pneumatic System Press to Flight Level |
| 00:40 |
01:10 |
Heater Activation |
| 00:40 |
01:10 |
FTS Test |
| 00:35 |
01:05 |
FGM Activation |
| 00:25 |
00:55 |
Load Boost Block |
| 00:20 |
00:50 |
Fault Protection Validation |
| 00:17 |
00:27 |
Polls for Terminal Countdown |
| 00:16 |
00:46 |
Fuel Fill Sequence Initiation |
| 00:15 |
00:45 |
History Data Dump |
| 00:15 |
00:45 |
Term CT Configuration complete |
| 00:04 |
00:34 |
T-4-Minute HOLD |
| HOLDING |
00:30 |
Weather Briefing |
| Variable Hold |
00:25 |
Fuel Fill Sequence Complete |
|
00:17 |
Range Clear Poll |
|
00:16 |
Spacecraft GO/No GO Poll |
|
00:16 |
NAM Poll |
|
00:16 |
SMD Poll |
|
00:15 |
Water Deluge System actuation Pressure Adjustment |
|
00:15 |
Centaur LOX at Flight Level |
|
00:15 |
Centaur LH2 at Flight Level |
|
00:13 |
Spacecraft Poll |
|
00:07 |
Launch Director Final Poll |
|
>>>> |
SAFE L-9MIN CONFIGURATION FOR EXTENDED HOLDS |
|
00:07 |
Spacecraft Status Check |
|
00:06 |
Spacecraft on internal Power |
|
00:06 |
LD GO to Launch |
|
00:05 |
Range Clear Validation |
| COUNTING |
00:04 |
Hazardous Gas Monitoring Complete |
| 00:04 |
00:04 |
Automatic Sequence Begins |
| 00:04 |
00:04 |
Atlas LOX Replenish Terminated |
| 00:04 |
00:04 |
Atlas LOX Tank Pressurization |
| 00:03 |
00:03 |
Atlas Tanks at Flight Pressure |
| 00:02 |
00:02 |
Atlas and Centaur switch to internal Power |
| 00:01:55 |
00:01:55 |
CMD Sequence |
| 00:01:50 |
00:01:50 |
Centaur Topping Sequence complete |
| 00:01:30 |
00:01:30 |
Launch Control System Enabled |
| 00:00:16 |
00:00:16 |
Launch Verification |
| 00:00:02.7 |
00:00:02.7 |
Main Engine Start |
| 00:00:00.0 |
00:00:00.0 |
Booster Ignition |
| +00:00:01.1 |
+00:00:01.1 |
Liftoff |
