Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/2015Spring/HowelltagR2957.pdf Дата изменения: Tue Sep 9 17:25:08 2014 Дата индексирования: Mon Apr 11 16:43:40 2016 Кодировка: Поисковые слова: annular solar eclipse

Proposal Identification No.:

R2957 Arecibo Observatory

Date Received: 2014-Sep-01 22:32:07 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Sep 1 2014. This proposal has not been submitted before. Proposal Type: General Category: Observation Category: Time Requested this semester: Hours Next 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: The NASA support for the planetary radar program at Arecibo Observatory is now 800 hours/year, of which at least 500 hours/yr are devoted to near-Earth asteroids (NEAs). This proposal covers the time request for the second-best imaging opportunities, radar astrometry, and systematic survey time. Radar characterization of NEAs is valuable, even at the lower signal-to-noise levels that precludes high-resolution imaging. Overall shape determination, astrometry to improve the orbit solution, and regular surveys to observe new ob jects and targets of opportunity all yield valuable scientific results. Outreach Abstract: Arecibo Observatory is one of only two places in the world with a radar transmitter for studying planets and asteroids in the solar system. We send out a radar signal, and receive the signal that bounces off the asteroid or planet's surface. From these echos we can make images to determine the size, shape and rotation rate of the asteroid. We have discovered that some asteroids near Earth have moons in orbit around them. Some are round, others are elongated, or look like two balls, stuck together. Radar measurements can greatly improve the orbit of recently discovered ob jects, and let us predict hundreds of years into the future if any might collide with the Earth. Regular Planetary Radar Solar System 150 150 300 hours/yr 300 hours/yr 2 hours 100-500 GB

Radar Characterization of NEAs: Using Moderate Resolution Imaging, Astrometry, and a Systematic Survey

Name Ellen Howell Michael Nolan

Institution Arecibo Obs Arecibo Obs.

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

Phone 787 878-2612 x282 787 878-2612 x334

Student no no

1


Additional Authors
Radar team (see proposal for full author list)

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 UT. For these observations night-time is not needed.

Begin ­ End Interval­Interval ­ ­ ­ ­

Days Needed at This Interval

Time Constraints (Must Be Justified in the Prop osal Text) see proposal

Next Semester Time Request

Begin ­ End Interval­Interval ­ ­ ­ ­ 2

Days Needed at This Interval


Time Constraints (Must Be Justified in the Prop osal Text) see proposal

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 Frequency Ranges Planned
2380 MHz

Section V - Observing List Target List
see proposal for target list and ephemeris information

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