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Proposal Identification No.:

T2568

Date Received:

2010-Feb-01 13:33:48

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: Regular Terrestrial Aeronomy Radar Solar System 24 hours Hours

Electromagnetic Scattering from Meteors Detected Simultaneously at VHF and

UHF
ABSTRACT:
We propose to characterize the scattering mechanism of meteor plasmas, referred to as head echoes, using the 46.8 MHz and 430 MHz systems. Specifically, we will collect dual-frequency measurements and compare the radar cross section (RCS) of the VHF and UHF events using well-established as well as new waveforms and test our assumptions on meteor plasma size. By utilizing these data in an electromagnetic scattering model, we can determine the plasma density of the meteor and determine the dependence between peak density, meteoroid velocity and altitude. Additionally, through modeling of the ablation parameter, we can derive fundamental meteoroid parameters including the mass and density by using the ballistic parameter in conjunction with the measured signal strength. This will be the first time that meteoroid densities will be derived independently. These results will be used to determine the mechanism for scattering, which remains a controversial and as yet unconfirmed theory to date and allow us to test our theory with the Arecibo data set that is rich in both its precision and sensitivity. It will also provide an opportunity for students in the Department of Aeronautics and Astronautics at Stanford University to learn about Arecibo Observatory and become familiar with the data.

Name Sigrid Close

Institution Stanford University

E-mail sigridc@stanford.edu

Phone 650 725 2863

Student no

Remote Observing Request

X

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

Instrument Setup
47 radar 430 CH radar

Atmospheric Observation Instruments: 1


Sp ecial Equipment or setup:

none

RFI Considerations Frequency Ranges Planned

2