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Proposal Identification No.:

T2250

Date Received:

2006-Jun-05 19:57:43

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: Large Terrestrial Aeronomy Radar Thermosphere 528 hours Hours 3 hours

The Burnside Factor Revisited: A Model-Independent Ion Momentum Balance

Study
ABSTRACT:
Studies of momentum exchange between the thermosphere and ionosphere have been used for decades to infer discrepancies between observation and theory in terms of the Burnside factor F . The lack of independent information regarding O density, however, introduces an ambiguity regarding the physical meaning of this "correction" factor: while it is usually intended to constrain theoretical estimates of the O+ -O momentum transfer cross section QO+-O , it could also reflect systematic bias in the (historically required) model specification of O density. We propose to incorporate O density and T values, derived empirically as solutions to the H+ continuity balance equation, into the O+ momentum balance equation to determine F and thus QO+-O . The pro ject will use incoherent scatter measurements of the F-region and topside ionosphere in conjunction with passive optical observations of thermospheric winds (O 630.0 nm emission) and neutral H density (H 656.3 nm emission). This result has the potential to increase the accuracy of both future experimental studies - such as momentum or energy balance derivation of thermospheric density and temperature - as well as model calculations of thermospheric energetics or dynamics.

Name Waldrop S Lara

Institution Univ. of Illinois at Urbana-Champaign

E-mail lwaldrop@uiuc.edu

Phone 217-244-5129

Student no

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 1


Atmospheric Observation Instruments: Tilt-Photometer Fabry-Perot none

Sp ecial Equipment or setup:

RFI Considerations Frequency Ranges Planned

2