Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/LeetagT2318tp.pdf Дата изменения: Fri Feb 9 22:21:14 2007 Дата индексирования: Sun Apr 13 02:17:36 2008 Кодировка: Поисковые слова: reflection nebula

Proposal Identification No.:

T2318

Date Received:

2007-Feb-01 22:40:21

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Terrestrial Aeronomy Radar Ionosphere 80 Hours 5 hours

Multi-diagnoses of processes leading to ionospheric plasma line enhancement

Based on Arecibo experiments carried out in late December of 2005 and early January of 2006, we have found possible processes leading to two types of plasma line enhancement. These processes were caused by 40.75 kHz whistler modes, originating from Naval transmitter located in Puerto Rico. Direct interactions of 40.75 kHz whistlers with ionospheric plasmas can excite lower hybrid waves to accelerate electrons and, subsequently, yield enhanced plasma lines with rather broad frequency spectra. In contrast, whistler waves propagating from the ionosphere into magnetsophere will interact and precipitate trapped energetic electrons from the inner radiation belts into the lower ionosphere, generating enhanced plasma lines with realtively narrow frequency spectra. As outlined in the attached proposal, several students have developed thesis research plans for further experimetal and theoretical investigation of these intriguing phenomena. For optimum optical diagnoses, it is highly desirable to conduct experiments during the new moon period.

Name Min-Chang Lee

Institution MIT

E-mail mclee@mit.edu

Phone 617-253-5956

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: Fabry-Perot Ionosonde Lidar Description of Observer Equipment: MIT All Sky Imaging System and VLF/LF Receiving System. 1


Sp ecial Equipment or setup: None

RFI Considerations Frequency Ranges Planned

2