Accession Number:

AD0460278

Title:

ATMOSPHERIC TRANSMISSION AND WEATHER MEASUREMENTS,

Descriptive Note:

Corporate Author:

NAVAL APPLIED SCIENCE LAB BROOKLYN NY

Personal Author(s):

• Derksen, Willard L.
• Bates, John J.
• Murtha, Thomas D.
• Monahan, Thomas I.

Report Date:

1953-01-01

Pagination or Media Count:

45.0

Abstract:

The purpose of the NMLs participation in Operation TUMBLER-SNAPPER was to measure the transmissivity of the atmosphere and to obtain the temperature, humidity and other weather data which are pertinent in evaluating the results of experiments concerned with the effects of thermal radiation. The atmospheric attenuation of a ground level path indicated serious deviations because of atmospheric boil, dust and refraction effects. Measurement over a slant path, employing a hilltop station and approximating the path of thermal radiation from a nuclear detonation, gave reliable results. Lower transmissivities were found for ultraviolet and infrared wave lengths than for visible light and indicated the need for more complex attenuation relationships especially for spectral energy determinations. The NML transmissometer was operationally successful and was operated unattended in the area at the time of an atom bomb detonation. Author

Descriptors:

• *NUCLEAR EXPLOSIONS
• *WEATHER FORECASTING
• MEASUREMENT
• THERMAL RADIATION
• THERMAL RADIATION
• TEMPERATURE
• HUMIDITY
• DIURNAL VARIATIONS
• INFRARED SPECTRA
• VISIBLE SPECTRA
• ULTRAVIOLET SPECTRA

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE