Some Trans-Pacific Radio Field Intensity Measurements

The paper describes measurements on the daylight radio field intensity produced in San Diego, California, by the arc stations at Cavite, Philippine Islands, 11,800 km., and Malabar, Java, 14,700 km. distant. These distances are nearly twice as great as any previously studied, except for a few scattered measurements. The average observed intensities were, from Cavite 2.04 μ v./m.., and from Malabar 4.02 μ v./m., while those calculated from the Austin-Cohen formula are respectively 0.69 μ v./m., and 1.83 μ v./m. These ratios of observed to calculated values indicate an increase in the divergence from the formula with increasing distance, but not so great as was indicated by earlier scattered observations.