TY - RPRT TI - Performance predictions for single tropospheric communication links and for several links in tandem AU - Barsis, AP AU - Longley, AG AU - Norton, KA AU - Barsis, A P PY - 1961 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS TN 102 DO - 10.6028/NBS.TN.102 ER -