Unknown Marine Band 157.740
From Signal Identification Wiki
This is POCSAG. --Cartoonman (talk) 16:15, 27 November 2016 (NZDT)
Unknown signal picked up in Marine band at 157.740 MHzMegaHertz (MHz) 10^6 Hz in central Massachusetts. (Picked up in Kalamazoo County, Washington County Vermont,and Michigan)
Signal IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. [1]