Primary Goal: The QMAP experiment was a balloon-borne CMB telescope designed to map anisotropy on degree scales and to measure the angular power spectrum covering the range 40 < l < 200.


  • Two 40 GHz HEMT detectors at resolution of 0.9 degrees (one in each polarization)
  • Four 30 GHz HEMT detectors at resolution of 0.6 degrees (two in each polarization)
  • Optics: Four cooled corrugated feeds under-illuminate a fixed off-axis parabolic mirror of 0.85m diameter. The mirror in turn under-illuminates a large chopping flat (chopper). The chopper is closest to the sky so that the illumination on the parabola is stationary.


  • Flight 1  - Palestine, Texas, June 1996 (4.7 hours of integration) float at 30 km
  • Flight 2 - Fort Sumner, New Mexico, November 1996 (11 hours of integration) float at 30 km
  • Sky Coverage: 527 square degrees in multiply interlocking pattern allowing for internal checks leading to a true map

    Example HR

    The Team
    Lyman Page
    Mark Devlin
    Tom Herbig
    Barth Netterfield
    Amber Miller
    Max Tegmark
    Angelica de Oliveira-Costa
    Photo Galleries

    launch pad  On the launchpad

    santa fe  Near Fort Sumner, New Mexico

    Princeton QMAP site