Accession Number:

ADP002731

Title:

Automatic Electron Density Profiles from Digital Ionograms,

Descriptive Note:

Corporate Author:

LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH

Personal Author(s):

• Reinisch,B. W.
• Gamache,R. R.
• Tang,J. S.

Report Date:

1983-08-01

Pagination or Media Count:

11.0

Abstract:

Over-the-horizon HF radar detection and sea state monitoring require fairly precise knowledge of the ionospheric reflection point. Automatic scaling of ionograms and calculation of the vertical electron density profile can provide the reflection point characteristics in real time if adequate ionosondes are available at the expected midpoints. The automatic scaling algorithm developed at the University of Lowell extracts the E and F region traces from Digisonde ionograms without any human intervention and automatically produces the corresponding electron density profiles. The algorithm was tested on several thousand Digisonde ionograms covering the four seasons, day, night, quiet and disturbed conditions, as observed at the AFGL Ionospheric Observatory, Goose Bay, Labrador.

Descriptors:

• *IONOGRAMS
• *OVER THE HORIZON DETECTION
• *SEARCH RADAR
• *IONOSPHERIC PROPAGATION
• *ELECTRON DENSITY
• *PROFILES
• *SEA STATES
• IONOSONDES
• HIGH FREQUENCY
• SEASONS
• DIGITAL SYSTEMS
• SCALING FACTOR
• F REGION
• AUTOMATIC
• REFLECTION
• MONITORING
• INTERVENTION
• REAL TIME
• OBSERVATORIES
• NIGHT
• QUIET
• RADAR
• ALGORITHMS
• HUMANS

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE