Omnidirectional proton intensities (E?9--310 MeV) have been measured in seven energy channels by means of instruments on board the satellite OV1-19 (1969--25C). Undirectional spectra representative of the time interval March--November 1969 (a period near solar maximum) have been constructed from the data by standard methods. The results enable one to construct the distribution function f (M, L) at vanishing second invariant J for 1.18?L?2. The profiles of f (M,L) thus obtained are manipulated by a new variational method to yeild normalization parameters for the radial diffusion coefficients Dll(m) and DLL(e), caused, respectively, by magnetic and electrostatic impulses of magnetospheric extent. One typically obtains DLL ~[7¿10-9+1¿10-10¿ (&ggr;M0/M)2>L10 day-1 as the best two-parameter fit to DLL¿DLL(m)+ DLL(e), where M0¿1 GeV/G and &ggr; is the ratio of relativistic mass (m) to rest mass (m0).