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28 March 2005, 01:55 UTC:   Instruments of the Deep Space Mission

bullet Instruments Aboard The Space Craft
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Instrument aboard the Deep Impact Space Craft have two major purposes:

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They help guide the space craft to its intercept point. The intercept point of the Deep Space Mission is Comet Tempel 1.

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They accumulate the mission's scientific data before impact, during the impact sequence, and post impact.

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Telescopes:

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HRI
High Resolution Instrument (HRI)
MRI
Medium Resolution Instrument (MRI)
ITS
Impactor Targeting Sensor (ITS)
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High Resolution Instrument (HRI)

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The HRI is one of the two main mission instruments. The Medium Resolution Instrument is the second of the two main instruments.

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The High Resolution Telescope provides an interface for the multispectral camera,  an infrared spectrometer, and a special imaging module to the point of focus on comet Tempel 1. It is the telescope that sets the field of view (FOV) and the resolution of both the High and Medium resolution instruments. The MRI also plays a major role in the navigation systems of the space craft.

RIGHT: Image of the telescope platform on the Deep Space Impact Mission

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The Impactor Targeting Sensor (ITS) uses the same telescope and Charge Coupled Device (CCD) as the Medium Resolution Instrument. The difference between the Impactor Targeting Sensor and the Medium Resolution Instrument is the lack of a filter wheel in the ITS.

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We have written several articles on the "Bakeout procedure" that is a necessary part of the maintenance procedure for the "Charge Coupled Device" aboard the SOHO Great Observatory. The CCD aboard the Deep Space Impact Mission and the SOHO Mission require the same bakeout procedures to keep the CCDs free of  moisture and an organic slurry that fog the CCDs.

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Following the Bakeout procedure on the Deep Impact Mission's High Resolution Imager's CCD, scientist discovered that image quality and resolution was not as good as expected through the HRI.

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Relatively poor resolution on images obtained using the HRI are due to the fact that the telescope that is part of the HRI is out of focus. The out of focus telescope was a subject that was part of a 25 March 2005, news release from the Jet Propulsion Laboratory (JPL)

 

Below is an exact copy of the Deep Impact News Release of 19 Feb 2005 - This document was published as part of the Deep Impact Space Mission

 

DEEP NEWS

Newsletter for the Deep Impact mission

Issue #19, February 2005

 

On January 12, 2005 the Deep Impact spacecraft headed into space to begin its journey to Comet 9P Tempel 1 - for what purpose? One part of the twin spacecraft will collide with the comet to make a deep crater in its surface while the other spacecraft watches for 800 seconds. If you want the latest news on this incredible mission - read on! Then take a look at our web site at:

http://deepimpact.jpl.nasa.gov

http://deepimpact.umd.edu

 

PICTURE THIS! - BY THE DAWN'S EARLY LIGHT

This picture of the Deep Impact launch vehicle was taken during the early quiet hours of the morning by DC Agle, the mission's media representative before he moved on to work with the visiting press.

http://deepimpact.jpl.nasa.gov/gallery/early_light.html

 

AND PICTURE THIS! - BYE-BYE DEEP IMPACT!

Take a look at our launch day scrapbook of activities surrounding the ascent of the Deep Impact spacecraft.

http://deepimpact.jpl.nasa.gov/gallery/launch_scrapbook.html

 

GREAT EXPECTATIONS - DEEP IMPACT ON ITS WAY

At 1:47:08 EST, the Deep Impact spacecraft left Pad 17-B at Cape Canaveral in Florida housed safely inside the Delta II launch vehicle provided by Boeing. Management for launch was under the supervision of Kennedy Space Center. What did the team expect to happen? If you didn't read last month's newsletter, take a look at what we expected during the spacecraft's first hour of flight:

http://deepimpact.jpl.nasa.gov/mission/update-200501.html

What did happen? Data from the spacecraft showed that it had deployed, locked its solar panels and was receiving power having achieved proper orientation in space. Data also indicated that the spacecraft had gone to safe mode and was awaiting further instruction from the team on Earth. What is safe mode? Take a look at:

http://www.nasa.gov/mission_pages/deepimpact/media/2005-016.html

 

WHAT CAN WE SEE UP THERE?

The Deep Impact team took the spacecraft instruments out for a test drive. If you aren't familiar with the instruments aboard the Deep Impact spacecraft, take a look at: http://deepimpact.jpl.nasa.gov/tech/instruments.html

What were the results from each instrument? Take a look at: http://deepimpact.jpl.nasa.gov/gallery/first_light.html

 

WHAT'S GOING ON WITH DEEP IMPACT NOW?

Dave Spencer, Missions Manager for Deep Impact gives us an update on the mission.

http://deepimpact.jpl.nasa.gov/mission/update-200502.html

 

MORE ON DAVE SPENCER - UP CLOSE AND PERSONAL

Meet Dave Spencer and find out how his first grade playground conversations about time and the edge of the universe finally led him to supervising the flight team in its efforts to guide the spacecraft to Comet Tempel 1.

http://deepimpact.jpl.nasa.gov/mission/bio-dspencer.html

 

QUESTIONS FROM YOU - COMET OFF COURSE??

We've had lots of questions about the mission since the January launch and here are two of them and their answers.

Will the Deep Impact mission knock Comet Tempel 1 off its orbit path and send it toward Earth?

http://deepimpact.jpl.nasa.gov/faq3.html#q1

http://deepimpact.jpl.nasa.gov/faq3.html#q5

Are you using explosives to make the crater in Comet Tempel 1?

http://deepimpact.jpl.nasa.gov/faq1.html#q14

 

EDUCATORS LAUNCH INTO DEEP IMPACT

One day before the launch of Deep Impact, 27 educators from across the country gathered at the Kennedy Space Educator Resource Center to learn answers to questions about the Deep Impact mission like:

How the crater might form when we collide with Comet Tempel 1

How to use storytelling and song in science

How to use a soon to be released Deep Impact web site to observe Comet Tempel 1 on a beginner, intermediate and advanced level

How to use all the great Deep Impact hands-on activities in your classroom

Next month, we'll feature some of the information from the workshop on our web site, so stay tuned.

 

DEEP IMPACT COMIC BOOK

Take a look at NASA's comic book about Deep Impact.

http://www.nasa.gov/audience/forkids/home/F_Bumping_Into_a_New_Friend.html

 

HOW DO I GET MY OWN DEEP IMPACT SPACECRAFT?

We're glad you asked. You have three versions to choose from with our Deep Impact paper models at:

http://deepimpact.jpl.nasa.gov/disczone/models.html

Can you do it? Ten-year old Dante build his basic model to share with his fifth grade class and is headed on to build the detailed model.

http://deepimpact.jpl.nasa.gov/gallery/model-dante.html

 

DID YOU SEE OUR PAST DEEP NEWS ISSUES?

Visit http://deepimpact.jpl.nasa.gov/newsletter/archive.html to catch up on exciting past news from the Deep Impact mission.

 

Deep Impact is a Discovery mission. For more information on the Discovery Program, visit:

http://discovery.nasa.gov/

 

The Deep Impact mission is a partnership among the University of Maryland (UMD), the California Institute of Technology's Jet Propulsion Laboratory (JPL) and Ball Aerospace and Technology Corp (BATC). Deep Impact is a NASA Discovery mission, eighth in a series of low-cost, highly focused space science investigations. See http://deepimpact.jpl.nasa.gov or our mirror site at http://deepimpact.umd.edu.

 

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Send this email along to your friends. If you received this newsletter from a friend, you can subscribe here: http://deepimpact.jpl.nasa.gov/newsletter/signup.html

To unsubscribe, follow the instructions at the URL above.

 

QUESTIONS ABOUT DEEP NEWS? CONTACT US AT:

http://deepimpact.jpl.nasa.gov/feedback.html