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SpaceXFalcon 9 Block 5Space Launch Complex 4E, Vandenberg SFB, CA, USA

WSF-M2 & BLAZE-2 (USSF-178)

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NET Q1 2027Add to calendar

To Be Determined

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Summary

WSF-M2 & BLAZE-2 (USSF-178) is expected to launch on a SpaceX Falcon 9 Block 5 from Space Launch Complex 4E, Vandenberg SFB, CA, USA in Q1 2027. It is SpaceX's 795th launch, 13th this year and humanity's 7,559th orbital launch attempt. It is planned as the 693rd Falcon 9 Block 5 flight and the 12th this year. The payload is bound for Polar Orbit (PO).

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Mission
Earth Science · Polar Orbit (PO)for USSF
Milestone
Planned as the 693rd Falcon 9 Block 5 flight · 12th this yearSpaceX's 795th launch13th this yearhumanity's 7,559th orbital launch attempt28th orbital launch attempt this year

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About this launch

Second 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. The launch will also include BLAZE-2, a launch opportunity for operational, research, development, and prototype small satellites from across the DoD.

Pad

Map of Space Launch Complex 4E

Space Launch Complex 4E, Vandenberg SFB, CA, USA

Planned as the 329th launch from Space Launch Complex 4E, 5th this year · 957th from Vandenberg SFB, CA, USA

303 launches from this pad · 919 from Vandenberg SFB, CA, USA

31 days after the previous launch from this pad

Updates

NET early 2027.

Show 2 earlier updates
  • NET 2028.

    Cosmic_Penguin · 2/9/2026 · source

  • Added launch.

    Cosmic_Penguin · 6/28/2025 · source

Questions

When does WSF-M2 & BLAZE-2 (USSF-178) launch?

WSF-M2 & BLAZE-2 (USSF-178) is scheduled in Q1 2027.

Where can I watch WSF-M2 & BLAZE-2 (USSF-178) live?

No webcast has been announced yet.

What rocket is launching WSF-M2 & BLAZE-2 (USSF-178)?

Falcon 9 Block 5, flown by SpaceX. Falcon 9 Block 5 spec sheet

Where is WSF-M2 & BLAZE-2 (USSF-178) launching from?

Space Launch Complex 4E, Vandenberg SFB, CA, USA.

What orbit is WSF-M2 & BLAZE-2 (USSF-178) going to?

Polar Orbit (PO), a earth science mission.