Synoptic observations of the radio noise background in the frequency range 150-180 kHz to provide design data for the low frequency communications designer

Observations were made of the radio noise background in the frequency range 150-180 kHz to provide reference data for the design of the Ground Wave Emergency Network (GWEN) system. These observations were undertaken at Nanjemoy, Maryland, during early summer 1983, and included forty-one days of data recording. The noise environment was found to be dominated by impulsive thunderstorm noise. Preliminary data analysis is presented; the recorded data is available on magnetic tape for authorized users to use for system design purposes.