SIN - (PSI). Measurement of five complex pp elastic scattering amplitudes and their relative phases at 447, 497, 517, 539, and 579 MeV energies. The formalism used is that developed in J.Bystricky et al., J. Phys. (Paris) 39, 1 (1978). The phases are relative to the phase of the amplitude & apos;E& apos;. Errors given are statistical only.