A single-channel prototype pushbroom imager has been developed to the specifications required for forestry remote-sensing applications and for mapping. It is based on a commercially available 6000-element linear array for which a special wide-angle, high modulation transfer function lens was designed and fabricated. The test was flown aboard a twin-engine jet aircraft. The sensor has produced high-quality imagery with pixel sizes down to 25 cm.
R. A. Neville, R. Marois, J. W. Schwarz, and S. M. Till, "Wide-angle high-resolution line-imager prototype flight test results," Appl. Opt. 31, 3463-3472 (1992)