USA-233, or Wideband Global SATCOM 4 (WGS-4) is a United States military communications satellite operated by the United States Air Force as part of the Wideband Global SATCOM program, launched in 2012.

[1] The Wideband Gapfiller SATCOM (WGS) system is a constellation of military communications satellites.

[2] According to the United States Space Force Fact Sheet "Just one WGS satellite provides more SATCOM capacity than the entire legacy Defense Satellite Communications System (DSCS) constellation.

WGS provides worldwide flexible, high data rate and long haul communications for the Department of Defense (DOD), governmental organizations and international partners.

The launch vehicle successfully placed the satellite into a 440 by 66,870 km (270 by 41,550 mi) supersynchronous geostationary transfer orbit, with 24° of inclination.