Kestrel-4 flight control

Launch clockHoldRecycleCounting

T−

000942

Holding at T−

000400

Recycling to T−

001000

Count Hold Recycle

Liftoff (L−0)

14:32:00 UTC

Window closes

14:58:00 UTC

Built-in hold

T−4:00, 10 min

Go / no-go poll

Console	Lamp	Status
Flight		FlightNo-goGo
Booster		BoosterNo-goGo
FIDO		FIDONo-goGo
Guidance		GuidanceNo-goGo
EECOM		EECOMNo-goGo
Network		NetworkNo-goGo
Range		RangeNo-goGo
Weather		WeatherNo-goGo
Surgeon		SurgeonNo-goGo
CAPCOM		CAPCOMNo-goGo
Poll		/10 go

Range & weather

Range greenWeather 80% go

Surface wind

12 kt from 072°

Gusts

19 kt

Ceiling

6,500 ft

Lightning

Nearest 14 nmi

Anvil cloud

8 nmi

Upper winds

Balloon 1132Z

Sea state

1.2 m

Launch azimuth

1. N
2. NE
3. E
4. SE
5. S
6. SW
7. W
8. NW

Updated 9s ago

Propellant & pressure

LOX 97%

1. E
2. ½
3. F

97%

LOX load

RP-1 100%

1. E
2. ½
3. F

100%

RP-1 load

49.6 psi

1. 0
2. 20
3. 40
4. 60
5. 80

49.6psi

LOX tank ullage

Ground track · rev 0 / 1GPS lock

Kestrel-4 N

• Flown
• Planned
• Station

2,000 km

Flight director loopFD-1

1. 14:12:04FlightAll stations, coming up on the T−20 poll.
2. 14:13:30BoosterStage 1 tanks at flight pressure.
3. 14:15:51WeatherAnvil cloud 8 miles west, watching it.
4. 14:17:12NetworkMadrid downlink dropped, reacquiring.
5. 14:19:40FIDOTargeting loaded, azimuth 072.
6. 14:21:58RangeRange is green, all assets on station.
7. 14:22:16WeatherNo-go: cumulus rule, recommend hold at T−4.

Vehicle telemetry1s ago

Bus voltage

28.1V

Battery

94%

Avionics temp

31.4°C

Cabin pressure

14.7psi

Hydraulics

3,012psi

Engine chill

9 of 9 chilled

FTS

Armed · safe

Downlinks

• Canberra DSS-432.0Mb/s
• Madrid DSS-630.4Mb/s
• Goldstone DSS-14AOS 15:06
• TDRS-12 relay50Mb/s

Frame sync

99.98%

Range-rate

+0.42 m/s

Next handover

Canberra → TDRS at 14:41

Mission clocks

1. 12
4. 3
7. 6
10. 9

UTC

14:22:19

Local (EDT)

10:22:19

MET

−00:09:41

Sunset

22:58

Mission timeline

1. T−3:00:00Propellant load

   LOX and RP-1

2. T−0:45:00Crew access arm

   Retracted

3. T−0:09:42Terminal count

   Poll at T−4

4. T+0:01:12Max-Q

   Shear winds high

5. T+0:02:34MECO & separation
6. T+0:08:47SECO-1
7. T+0:52:10Orbit circularise