High resolution D-region measurements at Arecibo
Article first published online: 7 DEC 2012
Copyright 1974 by the American Geophysical Union.
Volume 9, Issue 2, pages 151–157, February 1974
How to Cite
1974), High resolution D-region measurements at Arecibo, Radio Sci., 9(2), 151–157, doi:10.1029/RS009i002p00151., and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Received: 12 NOV 1973
D-region electron densities have been measured with a height resolution of less than 1 km using the incoherent scatter technique with coded pulses. Using a theoretical production model and the measured densities, recombination coefficients were computed for the altitude range from 80 to 95 km. The effective recombination coefficient decreases across the D-region ledge from a value of about 2 × 10−5 cm3 sec−1 below the ledge to a value of the order of 1 to 5 × 10−7 above. The change is presumably due to a transition from water cluster ions to the molecular ions NO+ and O2+.