The characterization of atmospheric turbulence at and above the two candidate sites for the 15 m National New Technology Telescope (NNTT) has required the development of specialized measurement techniques. The equipment used to measure astronomical seeing, microthermals, water vapor, and temperature is discussed, along with sample data and calibration results. By use of instruments with overlapping altitude coverage, it has been possible to "bookkeep" qualitatively all of the sources of innate degradation, especially near the ground.
F. F. Forbes,
D. A. Morse,
G. A. Poczulp,
"Site Survey Instrumentation For The National New Technology Telescope (NNTT)," Optical Engineering 27(10), 271045 (1 October 1988). https://doi.org/10.1117/12.7976774