A wide-angle Michelson Doppler imaging interferometer (WAMDII) is described that is intended to measure upper atmospheric winds and temperatures from naturally occurring visible region emissions, using Spacelab as a platform. It is an achromatic field-widened instrument, with good thermal stability, that employs four quarterwave phase-stepped images to generate full images of velocity, temperature, and emission rate. For an apparent emission rate of 5 kR and binning into 85 × 105 pixels, the required exposure time is 1 sec. The concept and underlying principles are described, along with some fabrication details for the prototype instrument. The results of laboratory tests and field measurements using auroral emissions are described and discussed.
© 1985 Optical Society of America
Original Manuscript: July 19, 1984
Published: June 1, 1985
Gordon G. Shepherd, William A. Gault, D. W. Miller, Z. Pasturczyk, Sean F. Johnston, P. R. Kosteniuk, J. W. Haslett, David J. W. Kendall, and J. R. Wimperis, "WAMDII: wide-angle Michelson Doppler imaging interferometer for Spacelab," Appl. Opt. 24, 1571-1584 (1985)