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Proposal Identification No.:

T2686

Date Received:

2011-Sep-28 15:43:48

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Long-term Terrestrial Aeronomy Radar Thermosphere 260 Hours 10 hours

Electron Thermal Balance in the Midlatitude Ionosphere

This proposal addresses the problem of electron thermal balance in the midlatitude ionosphere. Radar data acquired at Arecibo Observatory, Puerto Rico together with modeling calculations will be used to solve this problem. Past studies have led to a long-standing debate as to whether solar EUV fluxes must be doubled, or electron gas cooling rates must be halved. The proposed experiments will for the first time decisively separate out the increase in solar EUV flux from the decrease in cooling rates required to achieve electron thermal balance. While the first illustration of this straight-forward concept was published in 1977 [Carlson et al., 1977, GRL], current observing techniques at Arecibo will allow us to acquire and process 100 times more information than available in the 1970s. Because the earlier experiments pointed towards thermal balance heating/cooling rates versus a solar EUV problem, several experiments must be performed over a range of electron densities/temperatures and/or neutral density conditions to determine electron gas cooling rates when different terms dominate (electrons, ions, neutral species).

Name Herbert C Carlson

Institution Utah State University

E-mail herbert.c.carlson@googlemail.com

Phone 435-797-9210

Student no

Remote Observing Request

X

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

Instrument Setup
430 CH radar Atmospheric Observation Instruments: 1


Ionosonde Sp ecial Equipment or setup: No special equipment, hardware, or software required.

RFI Considerations Frequency Ranges Planned
None.

2