Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/RapptagT2253tp.pdf Дата изменения: Tue Aug 15 22:46:03 2006 Дата индексирования: Sat Dec 22 21:20:30 2007 Кодировка:

Proposal Identification No.:

T2253

Date Received:

2006-Jun-01 16:22:04

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Terrestrial Aeronomy Radar Thermosphere 24 hours Hours

Signatures of charged meteoric smoke particles in incoherent scatter radar spectra

Meteoric smoke particles have long been predicted to exist in the mesosphere as a result of meteoroid ablation and subsequent recondensation and coagulation processes. These particles have been suggested to be involved in a wealth of atmospheric processes such as aerosol nucleation or heterogeneous chemistry. However, to date only very few in situ measurements have succeeded to provide evidence for their existence and consequently our present knowledge of the properties of these particles is scarce. In this application, we propose to perform an in-depth study of the spectral shape of D-region incoherent scatter radar spectra in order to clarify whether charged meteor smoke particles do lead to prominent signatures in these spectra which can be used for determining characteristic parameters like the particle radius. For this purpose, the Arecibo incoherent scatter radar is the ideal tool since it provides both unprecedented signal to noise ratio at altitudes between 75 and 90 km, and a sufficient spectral bandwidth.

Name Rapp

Institution Institute of Atmospheric Physics, Kuehlungsborn, Germany

E-mail rapp@iap-kborn.de

Phone +49 38293 68 126

Student no

Remote Observing Request

X

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

Instrument Setup
430 CH receiver 430 CH radar

Atmospheric Observation Instruments: 1


Sp ecial Equipment or setup:

none

RFI Considerations Frequency Ranges Planned

2