During this era, radar meteorology moved from qualitative detection to quantitative interpretation of precipitation. Early work linked radar reflectivity to rainfall intensity and explored how backscatter and attenuation are governed by tropospheric turbulence and hydrometeor structure. Researchers also began addressing radar clutter and speckle through statistical reasoning, laying groundwork for operational rainfall estimation. Historical Significance: These advances established a lasting paradigm in which radar signals quantify hydrometeor processes. The introduction of a rainfall estimation framework, a tropospheric scattering theory, and a physical interpretation of the bright band and echo fluctuations provided essential tools for interpreting radar data and planning later weather radar systems. Together, these contributions anchored radar as a quantitative instrument in meteorology and informed subsequent developments in radar technology and atmospheric science.