Falcon 9 Block 5 — mission imagery
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JPSS 4 (Joint Polar Satellite System spacecraft No. 4)

Falcon 9 Block 5SpaceXSpace Launch Complex 4E
Friday, December 31, 2027 · 12:00 AM UTCAdd to Calendar

NextGo for Prop LoadT-35:00

Time to launch

537
DAYS
:
14
HRS
:
04
MIN
:
18
SEC
Launch Window Confidence
46% — Uncertain

Vehicle

Falcon 9 Block 5

Profile →

Falcon 9 is a two-stage rocket designed and manufactured by SpaceX for the reliable and safe transport of satellites and the Dragon spacecraft into orbit. The Block 5 variant is the fif...

Height70 m
LEO Payload22,800 kg
Launches832
Successes687

Provider

USA • Founded 2002

Space Exploration Technologies Corp., known as SpaceX, is an American aerospace manufacturer and space transport services company headquartered in Hawthorne, California. It was founded in 2002 by entrepreneur E...

Mission Brief

The JPSS constellation of satellites collects global multi-spectral radiometry and other specialized meteorologic, oceanographic, and solar-geophysical data via remote sensing of land, sea, and atmospheric properties. These data support NOAA’s mission for continuous observation of Earth’s environment to understand and predict changes in weather, climate, oceans, and coasts to support the nation’s economy and protect lives and property. NASA uses the instruments aboard the JPSS satellites to continue decades of Earth science research for the betterment of humanity. JPSS-4 carries the NASA Earth Venture mission Libera, an instrument to improve our understanding of trends in Earth’s energy imbalance and our changing climate.

PayloadJPSS 4 (Joint Polar Satellite System spacecraft No. 4)
OrbitSun-Synchronous Orbit
CustomerSpaceX
Stages2
PadSpace Launch Complex 4E, Vandenberg SFB, CA, USA

Mission Timeline

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Go for Prop Load

Launch director gives the go to begin fueling

T-35:00
11:25 PM UTC
  • Go for Prop LoadT-35:00
  • RP-1 Loading BeginsT-35:00
  • Stage 1 LOX Loading BeginsT-35:00
  • Stage 2 LOX Loading BeginsT-16:00
  • Engine Chill BeginsT-07:00
  • Flight Computer Final ChecksT-01:00
  • Tanks Pressurize for FlightT-01:00
  • Strongback Retract BeginsT-00:45
  • Engine Ignition Sequence StartsT-00:03

Ground vector

Launch site

Site locked

Space Launch Complex 4E

Vandenberg SFB, CA, USA

Global range
SITE LOCK
Latitude
34.632°N
Longitude
120.611°W

Range Weather

Launch commit criteria

Clear
Watch
TrackingNo active constraints
Weather Rules

Tracking no weather issues at this time.

Primary concern
No weather issues
Rule count
0
Temperature
Not reported
Surface wind
Not reported
Window

12:00 AM UTC - 12:00 AM UTC

Schedule History

No delays or schedule changes recorded.