Physics
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2745e&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 24, p. 2745-2748
Physics
18
Earth Ionosphere, Helium Ions, Hydrogen Ions, Incoherent Scattering, Least Squares Method, Photoelectrons, Proton Density (Concentration), Protons
Scientific paper
We have successfully employed a constrained non-linear least squares analysis of incoherent scatter data from the topside ionosphere over Arecibo, Puerto Rico to simultaneously deduce concentrations of helium ions, protons, and oxygen ions as well as ion and electron temperatures. The constraint encourages smooth temperature profiles, and its use avoids unrealistic parameter values in regions where light ions are more than 80% of the total. Here we report proton concentrations that remain higher than helium ion concentrations even though the latter reach 30% of the total and exceed the oxygen ion densities at altitudes as low as 700 km at night and 1500 km in the daytime. Before local sunrise the effects of conjugate-point photoelectrons are clearly seen, while after sunrise the transition heigh between oxygen and helium rises much more rapidly than does the transition from oxygen to hydrogen.
Erickson Philip J.
Swartz Wesley E.
No associations
LandOfFree
Mid-latitude incoherent scatter observations of helium and hydrogen ions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Mid-latitude incoherent scatter observations of helium and hydrogen ions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mid-latitude incoherent scatter observations of helium and hydrogen ions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1409218