Data driven ionospheric mapping technique for wide area nowcasting. Scientific report no. 4
A new multidimensional mapping technique is being developed which determines the three dimensional electron density distribution of the ionosphere over a wide area of several thousand kilometers at any time, from sounder data recorded at the previous period just before this time. Electron density profiles from five Digisonde stations in the northeastern regions of the North American continent are used to describe the electron distribution in a 30 deg longitude by 30 deg latitude region. The time histories over 32 hours of the profiles (the polynomial coefficients) from each station are Fourier transformed to determine the spectral components. For each spectral component a damped plane wave is fitted to amplitudes and phases at the five stations. This analysis is performed for each of the profile coefficients, and zonal maps are constructed as sums of these plane waves. This nowcasting technique can find applications in ray tracing for OTH radar, HF communication and HF direction finding.
- Research Organization:
- Massachusetts Univ., Lowell, MA (United States). Center for Atmospheric Research
- OSTI ID:
- 6721012
- Report Number(s):
- AD-A-258601/4/XAB; CNN: F19628-90-K-0029
- Country of Publication:
- United States
- Language:
- English
Similar Records
Global effects on Ionospheric Weather over the Indian subcontinent at Sunrise and Sunset
Polar-cap plasma convection measurements and their relevance to the real-time modeling of the high-latitude ionosphere
Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRON DENSITY
MAPPING
IONOSPHERE
ALGORITHMS
AMPLITUDES
COMPILED DATA
DAMPING
DETECTION
DISTRIBUTION
ELECTRON DETECTION
FOURIER TRANSFORMATION
MAPS
NORTH AMERICA
POLYNOMIALS
RADAR
THREE-DIMENSIONAL CALCULATIONS
USA
CHARGED PARTICLE DETECTION
DATA
DEVELOPED COUNTRIES
EARTH ATMOSPHERE
FUNCTIONS
INFORMATION
INTEGRAL TRANSFORMATIONS
MATHEMATICAL LOGIC
MEASURING INSTRUMENTS
NUMERICAL DATA
PLANETARY IONOSPHERES
RADIATION DETECTION
RANGE FINDERS
TRANSFORMATIONS
540110*
661320 - Auroral
Ionospheric
& Magnetospheric Phenomena- (1992-)