Some results with the new digital ionosonde in San Diego

Technical Report · Fri Jan 01 00:00:00 EST 1993

OSTI ID:6195324

Paul, A K; Sprague, R A

The new digital ionosonde (Dynasonde) became operational in early March 1992. The system takes ionograms in five minute intervals and the data are processed, extracting F-region profile and propagation parameters on a routine basis. The data verify earlier findings that a minimum sampling rate of twelve ionograms per hour is necessary to avoid aliasing. The most surprising result to date is the observation of large variations of the height of the F-region maximum (of the order of 100 km) during the nighttime hours of otherwise undisturbed days in late March and early April. The observed height variations are quasi-periodic, with periods of two to three hours and appear to have little effect on the F-region maximum electron density.... Electromagnetic, Propagation, Electro-optics, Atmosphere.

• Research Organization: Naval Command, Control and Ocean Surveillance Center, San Diego, CA (United States)
• OSTI ID: 6195324
• Report Number(s): AD-A-265178/4/XAB
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DIGITAL SYSTEMS
PERFORMANCE TESTING
F REGION
DISTURBANCES
ELECTRO-OPTICAL EFFECTS
IONOSONDES
CALIFORNIA
ELECTRON DENSITY
SAMPLING
DEVELOPED COUNTRIES
EARTH ATMOSPHERE
ELECTRONIC EQUIPMENT
EQUIPMENT
IONOSPHERE
NORTH AMERICA
PLANETARY IONOSPHERES
RADIO EQUIPMENT
TESTING
USA
440700* - Geophysical & Meteorological Instrumentation- (1990-)
661320 - Auroral
Ionospheric
& Magnetospheric Phenomena- (1992-)