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Proposal Identification No.:

T2214

Date Received:

2006-Feb-01 00:50:53

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Prop osal Title: Regular Terrestrial Aeronomy Radar Ionosphere 112 Hours

Optical and Radar Diagnostics of Energetic Electron Precipitation over Arecibo,

Puerto Rico.
ABSTRACT:
We propose to conduct experiments for the further optical and radar diagnostics of energetic electron precipitation over Arecibo, caused by 40.75 kHz radio signals from the Naval transmitter (NAU) in Aquadilla, Puerto Rico. The proposed work is based on the evidence that NAU 40.75 kHz signals had caused electron precipitation from radiation belts over Arecibo, acquired from our experiments carried out from December 27, 2005 to January 3, 2006. In brief, on the night of January 1, 2006, the 40.75 kHz NAU signals monitored by MIT VLF receiving system were found to be absent for about 4 hours from 9 PM of January 1 to 1 AM of January 2. Very few events of E region plasma line enhancement were seen. In contrast, when the 40.75 kHz signals were present after 1 AM of January 2, E region plasma line enhancement was frequently recorded (see attached proposal for details). Six (6) MIT graduate and undergraduate students will participate in proposed experiments for their thesis research.

Name Min Chang Lee

Institution M.I.T.

E-mail mclee@mit.edu

Phone 671 253 5956

Student no

Service Observing Request

Remot e Observing Request

X

None All of the observing run. Part of the observing run. Queue Observing

X

No Maybe Yes

Instrument Setup
430 CH radar Atmospheric Observation Instruments: Fabry-Perot Ionosonde Description of Observer Equipment: MIT All Sky Imaging System (ASIS) MIT VLF receiving 1


system Sp ecial Equipment or setup: None

RFI Considerations Frequency Ranges Planned
None

2