[1] The experiment was conducted at an observation site on the southern slopes of Cerro Toco in the Atacama Desert of northern Chile.

[3] The telescope refitted the gondola and receiver from the QMAP experiment, mounted on a donated Nike Ajax trailer.

[4][5] Observations were taken in 1997 and 1998 from the Cerro Toco site, at an elevation of approximately 5,200 m (17,000 ft), with measurements of the angular power spectrum of the CMB in the multipole moment range of 50 to 400.

The Ka band HEMT channels observed the same pixel in the sky, orthogonally polarized to each other.

[1] The experiment aided in the detection of the first peak of the CMB's anisotropy power spectrum.