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USSF-62

© SpaceX

All launches
SpaceX

USSF-62

Success

Falcon 9 Block 5
T-minus to liftoff

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00

HOURS

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00

MINUTES

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00

SECONDS

Thursday April 11 2024, 14:25:00 UTC
StatusSuccess
VehicleFalcon 9 Block 5
OrbitPolar Orbit
PadSpace Launch Complex 4E
Loading map…

Mission

First Weather System Follow-on (WSF) satellite. WSF-M (Weather System Follow-on - Microwave) is the next-generation operational environmental satellite system for the Department of Defense (DoD), to replace the microwave wavelength weather forecasting capabilities of the DMSP satellites. Ball Aerospace has been selected in late November 2017 to be the prime contractor for 2 Low Earth Orbit (LEO) weather satellites with a passive microwave imaging radiometer instrument and hosted Government furnished energetic charged particle (ECP) sensor space weather payload developed by the Air Force Research Laboratory. The radiometer leverages the Ball-built Global Precipitation Measurement (GPM) Microwave Imager (GMI) instrument. This mission will improve weather forecasting over maritime regions by taking global measurements of the atmosphere and ocean surface.

Launch Timeline

Countdown

T-00:38:00

GO for Prop Load

T-00:35:00

Prop Load

T-00:35:00

Stage 1 LOX Load

T-00:16:00

Stage 2 LOX Load

T-00:07:00

Engine Chill

T-00:01:00

Startup

T-00:01:00

Tank Press

T-00:00:45

GO for Launch

T-00:00:03

Ignition

In-flight

T+00:00:00

Liftoff

T+00:01:12

Max-Q

T+00:02:19

MECO

T+00:02:23

Stage 2 Separation

T+00:02:30

SES-1

T+00:02:36

Booster Boostback Burn Startup

T+00:03:01

Fairing Separation

T+00:03:30

Booster Boostback Burn Shutdown

T+00:06:07

Entry Burn Startup

T+00:06:25

Entry Burn Shutdown

T+00:07:24

Stage 1 Landing Burn

T+00:07:52

Stage 1 Landing

T+00:08:27

SECO-1

T+00:49:51

SES-2

T+00:49:56

SECO-2

T+00:54:57

Payload Separation

Quick facts

VehicleFalcon 9 Block 5
OrbitPolar Orbit
PadSpace Launch Complex 4E
SiteVandenberg SFB, CA, USA
WindowThursday April 11 2024, 14:25:00 UTC→Thursday April 11 2024, 14:35:00 UTC

Vehicle

FamilyFalcon
Height70 m
Diameter3.7 m
Stages2
ReusableYes
LEO capacity22,800 kg
Track record606/607 successful
Landings593/598
Launch CodexDossier

Every source for this mission in one place — news, social, references, notes & the exact timeline.

Explore

Reusable Hardware

All boosters →
First Stage · Flight-provenB1082
active3rd flight
Flights22
Landings22/22100%
Fastest turn25d
Recovered · RTLS · LZ-4· 0 km downrange
55d 16h since last flight

Falcon 9 Block 5 booster.

Previous flights · 22
  1. #23Starlink Group 17-39+51d 23hOCISLYJul 21, 2026
  2. #22Starlink Group 17-41+45d 10hOCISLYMay 30, 2026
  3. #21Starlink Group 17-27+44d 18hOCISLYApr 15, 2026
  4. #20Starlink Group 17-23+30d 16hOCISLYMar 1, 2026
  5. #19Starlink Group 17-19+50d 6hOCISLYJan 29, 2026
Scrub riskLOW
Go92%
Q

Q's read

Weather & scrubLOW risk
Weather Go92%LL2 Go95%Wind2 m/sGusts2 m/sCloud3%Temp14°C

Limiting rule: Droneship recovery upper limit on sea state.

6.2 ≥ 6 ft significant wave height

Acquiring satellite view…
Trajectory unknown
Space Launch Complex 4E
Vandenberg SFB, CA, USA
34.632, -120.611