  The formalism for computing the signal-to-noise ratio (SNR) for laser radar
is reviewed and applied to the tasks of target detection, direction-finding,
and phase change estimation with squeezed light. The SNR for heterodyne
detection of coherent light using a squeezed local oscillator is lower than
that obtained using a coherent local oscillator. This is true for target
detection, for phase estimation, and for direction-finding with a split
detector. Squeezing the local oscillator also lowers SNR in balanced homodyne
and heterodyne detection of coherent light. Loss places an upper bound on the
improvement that squeezing can bring to direct-detection SNR.
