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Quantitative Observations of Dot Angel Echoes at Two Frequencies
Author(s) -
Deam Andrew P.,
LaGrone Alfred H.
Publication year - 1966
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/rds196615537
Subject(s) - wavelength , physics , radar , inversion (geology) , optics , astrophysics , geology , telecommunications , seismology , computer science , tectonics
Results of many observations of radar echoes of the clear‐air dot angel type at Austin, Tex., are reported. Measurements were made at two wavelengths, $#x03BB;=3.3 em and $#x03BB;=9.1 em, using nearly identical antenna beams pointed vertically. Results suggest particulate matter, probably insects, as the source of most clear‐air dot angel echoes. Other clear‐air angel‐type echoes which were observed on rare occasions are believed to originate at inversion layers. They were received only on S‐band and did not exhibit the same characteristics as most echoes of the dot angel type.