Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/2013Fall/HowelltagR2829.pdf Дата изменения: Wed Mar 6 01:08:20 2013 Дата индексирования: Fri Feb 28 23:03:51 2014 Кодировка: Поисковые слова: storm

Proposal Identification No.:

R2829 Arecibo Observatory

Date Received: 2013-Mar-02 17:24:50 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Mar 1 2013. This proposal has not been submitted before. Proposal Type: General Category: Observation Category: Time Requested this semester: Hours already used for this pro ject: Additional Hours required to complete pro ject: Minimum Useful Time: Expected Data Storage: Prop osal Title: ABSTRACT: Regular Planetary Radar Solar System 48

4 hrs 100-500 GB

Systematic Radar Observations of Small Near-Earth Asteroids

We propose a systematic radar survey of all available NEAs in an 8-hour observing run one night each month. Ob jects are available at any given time, but newly discovered ob jects will be more plentiful near the time of first quarter. We expect to observe about 8-10 ob jects each month to measure orbit distance and velocity, ob ject size, spin rate, polarization ratio and radar reflectance properties. These characteristics will give new insights about smaller NEAs than previously sampled. Outreach Abstract: Near-Earth asteroids are left over material from forming the planets. These bits of rock are orbiting the sun, and when they come near the Earth we can learn about them by using the Arecibo radar system, one of only two such systems in the world. We send a radar signal to the asteroid, and by receiving the echo that comes back, we can determine the orbit more precisely, and find the size, rotation rate and sometimes the shape of the asteroid. We can effectively do a fly-by of many asteroids for a small fraction of the cost of a spacecraft mission.

Name Ellen S Howell Michael C Nolan

Institution Arecibo Observatory Arecibo Observatory

E-mail ehowell@naic.edu nolan@naic.edu

Phone 787 878-2612 x282 787 8782612x334

Student no no

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Additional Authors
Patrick Taylor ptaylor@naic.edu Alessondra Springmann sondy@naic.edu Jon Giorgini jdg@tycho.jpl.nasa.gov

This work is not part of a thesis.

Remote Observing Request

X

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

Section I I - Time Request
The following times are in AST. For these observations night-time is required.

Begin ­ End Interval­Interval ­ ­ ­ ­

Days Needed at This Interval

Time Constraints (Must Be Justified in the Prop osal Text) We require one 8-hour block of time centered on local midnight each month. We prefer times 4-5 days after new moon, near first quarter. See proposal for scheduling constraints.

Section I I I - Instruments Needed
S-Band radar S-band receiver

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

Section IV - RFI Considerations
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Frequency Ranges Planned
2380

Section V - Observing List Target List
Targets of opportunity available at any time.

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