Premium
Ten‐Point Method of lonogram Reduction
Author(s) -
Schmerling E. R.
Publication year - 1967
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1002/rds19672101233
Subject(s) - ionogram , reduction (mathematics) , point (geometry) , data reduction , sampling (signal processing) , mathematics , geodesy , statistics , optics , physics , geology , geometry , electron density , quantum mechanics , detector , electron
The “ten‐point” manual method of ionogram reduction provides true heights at selected frequencies. The method is especially convenient when only the height of maximum density is required, but it can also be used to obtain the complete profile. A single true height is obtained as the average of ten virtual heights sampled at fixed submultiples of the frequency. The sampling points, which depend on the geomagnetic parameters, may be rapidly selected by using the appropriate transparent overlay. A correction for underlying ionization may be incorporated by reading one virtual height from the extraordinary trace.