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Proposal Identification No.:

T2961

Date Received:

2014-May-11 14:16:48

Technical Page
This proposal has not been submitted before. Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT:
The incoherent scatter radar (ISR) plasma line (PL) during the daytime is excited by photoelectrons (Perkins and Salpeter, 1965). Measure of its intensity (kTp) has been used for their study since the earliest days of ISR (Yngvesson and Perkins, 1968; Cicerone, 1974). At night in the absence of any other excitation mechanism the PL intensity should have a thermal amplitude level kTe, determined by the electron gas temperature Te. To the contrary Carlson found the nighttime PL over Arecibo was enhanced 3-10 times above thermal level intensities despite the absence of any known causative mechanism (e.g. Carlson et al, 1982). That remains true now (figure 2 herein). This proposal is to solve the puzzle of why. Benefits can include adding a new user Arecibo community once the new excitation mechanism is discovered, and we hope to enable future auto-self calibration of world day runs 24 hours/day.

Regular Terrestrial Aeronomy Ionosphere 110 Hours 11

Solve the puzzle of what excites night-time plasma lines. (cover sheet was assigned ID 140508170733.0)

Name Herbert c Carlson

Institution Utah State University

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

Phone 1 435 760 1831

Student no

Remote Observing Request

X

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

Instrument Setup
430 G Atmospheric Observation Instruments:

1


Sp ecial Equipment or setup:

none

RFI Considerations Frequency Ranges Planned

2