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Proposal Identification No.:

T2698

Date Received:

2011-Nov-10 20:36:34

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: Urgent Terrestrial Aeronomy Radar Mesosphere 24 Hours 2

Electron Line Measurements at Arecibo: Electron Temperature and Collision

Frequency
ABSTRACT:
While typical incoherent scatter (IS) measurements focus on the ion contributions to the IS spectrum, which provide sensitivity to parameters like the electron density, ion composition, electron and ion temperatures, ion-neutral interactions, electric fields, more recent measurements have made use of Arecibo's extreme sensitivity combined with advances in electronics and computational capabilities to detect and study electron components of the incoherent scatter spectrum, such as the gyro line and plasma line. In this proposal, we attempt to measure an additional feature of the incoherent scatter spectrum in the lower ionosphere associated with collisional effects on the electrons. If successful, these measurements may lead to a diagnostic tool to assess the electron temperature and / or electron collision frequency in the lower ionosphere, where such effects are particularly hard to diagnose. Such measurements would be applicable to future ionospheric heating campaigns at Arecibo.

Name Michael J Nicolls

Institution SRI International

E-mail michael.nicolls@sri.com

Phone 6508594813

Student no

Remote Observing Request

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

Instrument Setup
430 CH receiver 430 CH radar Atmospheric Observation Instruments: Ionosonde Sp ecial Equipment or setup: none 1


RFI Considerations Frequency Ranges Planned

2