Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/CartertagR2105tp.pdf Дата изменения: Sun Sep 11 17:41:55 2005 Дата индексирования: Sat Dec 22 22:47:48 2007 Кодировка: Поисковые слова: regolith

Proposal Identification No.:

RR2105

Date Received:

2005-Jun-01 09:47:49

Technical Page
Proposal Type: General Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT: Regular Planetary Radar Solar System 13 Hours

A Radar Search for Regolith on the Asteroid 2004 VG64

We prop ose S-band (12.6 cm) radar observations of the near-Earth asteroid 2004 VG64 in order to search for the presence or absence of regolith and to study the surface physical prop erties. If the incident radar wave refracts into a surface (such as regolith) and is reflected by buried scatterers, the return echo will have a linear-p olarized comp onent that can b e measured using a full Stokes parameter analysis of the echo. This technique has b een successfully applied to the asteroids 1999 JM8 and 4179 Toutatis, and the requested observations are part of a larger pro ject to obtain data for a sample of asteroids and correlate the radar p olarimetric prop erties with different sizes, shap es, and p erhaps comp ositions. The size and rotation p erio d of 2004 VG64 are not known, but its absolute magnitude suggests that it is ab out 1 km in diameter. The asteroid comes within 0.044 AU of Earth, which will provide the high signal-to-noise ratios needed for the p olarimetric analysis.

Name Lynn M Carter

Institution Smithsonian Institution

E-mail carterl@si.edu

Phone 202-633-2254

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
S-Band radar S-band receiver

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
1


Frequency Ranges Planned
2378-2382

2