NASA Logo Wilkinson Microwave Anisotropy Probe
NASA Logo, National Aeronautics and Space Administration

WMAP Spacecraft

WMAP Spacecraft > WMAP Instrument

WMAP Instrument and Feedhorn Pair
WMAP Instrument

WMAP's Microwave System consists of ten 4-channel “differencing assemblies”, each of which receives signals from a pair of feeds. The output of each assembly is proportional to the temperature (brightness) difference between the two lines of sight on the sky. To improve sensitivity and stability the system has a cold section where the first stages of microwave signal amplification occur, then a warm section where the remaining amplification occurs before being converted to an electrical signal.

Credit: NASA / WMAP Science Team

Available formats:
160 x 90 JPG (3 KB)
250 x 193 JPG (10 KB)
320 x 228 JPG (16 KB)
621 x 480 JPG (49 KB)
2016 x 1436 JPG (386 KB)
2016 x 1436 PNG (514 KB)

WMAP # 990180

  • Webmaster: Britt Griswold
  • NASA Official: Dr. Edward J. Wollack
  • Page Updated: Friday, 04-16-2010