Launch index
To Be Determined

Falcon 9 Block 5 | WSF-M2 & BLAZE-2 (USSF-178)

March 31, 2027 at 12:00 AM UTC

Vandenberg SFB, CA, USA

Falcon 9 Block 5 | WSF-M2 & BLAZE-2 (USSF-178) launch image
Mission imagery · Falcon 9 Block 5

Launch details

LAUNCH TIME UNCONFIRMED

T−00d00h00m00s

March 31, 2027 at 12:00 AM UTC

Status: To Be Determined · Live feed refreshes every 30 seconds

Space Launch Complex 4E

Vandenberg SFB, CA, USA · 34.6320, -120.6110

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Launch site
Space Launch Complex 4E

Vandenberg SFB, CA, USA

Launch probability
Not published
Window opens
March 31, 2027 at 12:00 AM UTC
Window closes
March 31, 2027 at 12:00 AM UTC
Feed updated
August 20, 2026 at 8:12 PM UTC

Mission description

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.

Vehicle

Falcon 9 Block 5

Falcon · Block 5

Height

70 m

Diameter

3.65 m

LEO capacity

22,800 kg

Successful launches

624

Launch complex

Space Launch Complex 4E

Vandenberg SFB, CA, USA

Vandenberg Space Force Base is a United States Space Force Base in Santa Barbara County, California. Established in 1941, Vandenberg Space Force Base is a space launch base, launching spacecraft from the Western Range, and also performs missile testing. The United States Space Force's Space Launch Delta 30 serves as the host delta for the base, equivalent to an Air Force air base wing. In addition to its military space launch mission, Vandenberg Space Force Base also hosts space launches for civil and commercial space entities, such as NASA and SpaceX.

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Mission updates

NET early 2027.

August 20, 2026 at 8:12 PM UTC · Cosmic_Penguin

NET 2028.

February 9, 2026 at 6:50 PM UTC · Cosmic_Penguin

Added launch.

June 28, 2025 at 1:30 AM UTC · Cosmic_Penguin