SpaceXFalcon 9 Block 5Space Launch Complex 4E, Vandenberg SFB, CA, USA
WSF-M2 & BLAZE-2 (USSF-178)
Launch window
No countdown — this launch time is not yet known to the minute.NET Q1 2027Add to calendar
Image: SpaceX
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).
- Watch
- No webcast announced yet.
- Vehicle
- Falcon 9 Block 5 · SpaceX
- Booster
- Booster not yet assigned
- 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
Flight preview
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

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
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.
