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Proposal Identification No.:

T2252

Date Received:

2006-May-30 10:08:56

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Terrestrial Aeronomy Radar Thermosphere 20 Hours

The effect of the magnetic field on the plasma line asymmetry

A recent experiment in April 2006 measured the up-shifted and down-shifted ionospheric plasma lines using the modern coded long pulse (CLP) technique and the Arecibo 430 MHz incoherent scatter radar (ISR). The purpose of that experiment, as described in proposal T2211, is to use the plasma line asymmetry to extract the electron temperature. Such an advance could be a powerful new ionospheric diagnostic. Analysis of the April 2006 data indicates a fairly complicated relationship between the plasma line asymmetry and the density and temperature of the ionosphere, as we will show in this proposal. Using detailed kinetic theory for Langmuir waves, we believe we can extract the temperatures from the plasma line asymmetry. We have theoretically evaluated the role of the magnetic field on the plasma line asymmetry, and the results are rather unexpected (that there is an effect at all) but important. The experiment proposed here is designed to evaluate the magnetic field effects on the plasma line asymmetry, by using the dual-beam system aligned along the magnetic meridian. This is an interesting test of kinetic plasma theory (and the assumptions therein) and will also help in our goal of extracting the temperatures from the plasma line asymmetry.

Name Michael J Nicolls

Institution Cornell University

E-mail mjn25@cornell.edu

Phone 607-255-9070

Student G

Remote Observing Request

X

Observer will travel to AO Remote Observing In Absentia (instructions to operator)

Instrument Setup
430 G 430 CH receiver 430 CH radar

Atmospheric Observation Instruments:

1


Sp ecial Equipment or setup: Dual beam experiment (both transmitters needed)

RFI Considerations Frequency Ranges Planned
420-440

2