TY - GEN AU - A P Barsis AU - K O Hornberg C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1955-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CIRC.554 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1955 TI - Circular of the Bureau of Standards no. 554::Cheyenne Mountain tropospheric propagation experiments ER -