Author Topic: NASA - Dawn updates and discussion  (Read 378889 times)

Offline jacqmans

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NASA - Dawn updates and discussion
« on: 04/10/2007 04:37 PM »
04.10.07


RELEASE: 11-07

DAWN ARRIVES IN FLORIDA -- A LITTLE AFTER DAWN

The Dawn spacecraft arrived at Astrotech Space Operations in
Titusville, Fla., at 9 a.m. EDT today. Dawn, NASA's mission into the
heart of the asteroid belt, is at the facility for final processing
and launch operations. Dawn's launch period opens June 30.

"Dawn only has two more trips to make," said Dawn project manager
Keyur Patel of NASA's Jet Propulsion Laboratory in Pasadena, Calif.
"One will be in mid-June when it makes the 15-mile journey from the
processing facility to the launch pad. The second will be when Dawn
rises to begin its eight-year, 3.2-billion-mile odyssey into the
heart of the asteroid belt."

The Dawn spacecraft will employ ion propulsion to explore two of the
asteroid belt's most intriguing and dissimilar occupants: asteroid
Vesta and the dwarf planet Ceres.

Now that Dawn has arrived at Astrotech near NASA's Kennedy Space
Center, final prelaunch processing will begin. Technicians will
install the spacecraft's batteries, check out the control thrusters
and test the spacecraft's instruments. In late April, Dawn's large
solar arrays will be attached and then deployed for testing. In early
May, a compatibility test will be performed with the Deep Space
Network used for tracking and communications. Dawn will then be
loaded with fuel to be used for spacecraft control during the
mission. Finally, in mid-May, the spacecraft will undergo
spin-balance testing. Dawn will then be mated to the upper stage
booster and installed into a spacecraft transportation canister for
the trip to Cape Canaveral Air Force Station. This is currently
scheduled for June 19, when it will be mated to the Delta II rocket
at Pad 17-B.

The rocket that will launch Dawn is a Delta II 7925-H manufactured by
the United Launch Alliance; it is a heavier-lift model of the
standard Delta II that uses larger solid rocket boosters. The first
stage is scheduled to be erected on Pad 17-B in late May. Then the
nine strap-on solid rocket boosters will be raised and attached. The
second stage, which burns hypergolic propellants, will be hoisted
atop the first stage in the first week of June. The fairing which
surrounds the spacecraft will then be hoisted into the clean room of
the mobile service tower.

Next, engineers will perform several tests of the Delta II. In
mid-June, as a leak check, the first stage will be loaded with liquid
oxygen during a simulated countdown. The next day, a simulated flight
test will be performed, simulating the vehicle's post-liftoff flight
events without fuel aboard. The electrical and mechanical systems of
the entire Delta II will be exercised during this test. Once the Dawn
payload is atop the launch vehicle, a final major test will be
conducted: an integrated test of the Delta II and Dawn working
together. This will be a combined minus and plus count, simulating
all events as they will occur on launch day, but without propellants
aboard the vehicle.

The NASA Launch Services Program at Kennedy Space Center and the
United Launch Alliance are responsible for the launch of the Delta
II.

The Dawn mission to Vesta and Ceres is managed by the JPL, a division
of the California Institute of Technology in Pasadena, for NASA's
Science Mission Directorate in Washington, D.C. The University of
California Los Angeles is responsible for overall Dawn mission
science. Other scientific partners include Los Alamos National
Laboratory, New Mexico; German Aerospace Center, Berlin; Max Planck
Institute for Solar System Research, Katlenburg, Germany; and Italian
National Institute of Astrophysics, Palermo. Orbital Sciences
Corporation of Dulles, Va., designed and built the Dawn spacecraft.

Additional information about Dawn is online at:

http://dawn.jpl.nasa.gov
« Last Edit: 03/01/2015 01:07 PM by Chris Bergin »

Offline punkboi

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Re: NASA - Dawn updates and discussion
« Reply #1 on: 04/11/2007 04:46 PM »

All Aboard Dawn... The microchip bearing the names of 360,000 people are now on the spacecraft:

 http://img.photobucket.com/albums/v480/punkboi/dawn_microchip.jpg" width="400" border="0" />


Offline eeergo

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Re: NASA - Dawn updates and discussion
« Reply #2 on: 04/11/2007 09:11 PM »
Hey, I'm there! Unfortunately I can't see myself ;)
-DaviD-

Offline punkboi

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Re: NASA - Dawn updates and discussion
« Reply #3 on: 04/12/2007 05:22 PM »

Images of Dawn at the Astrotech facility in Florida:

 http://img.photobucket.com/albums/v480/punkboi/dawn1_astrotech.jpg" width="350" border="0" />

http://img.photobucket.com/albums/v480/punkboi/dawn2_astrotech.jpg" width="350" border="0" />


Offline jacqmans

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Re: NASA - Dawn updates and discussion
« Reply #4 on: 04/14/2007 09:37 AM »
Mission: Dawn
Launch Pad: Cape Canaveral Air Force Station, Fla.
Launch Vehicle: Delta II 7925-H
Launch Date: NET June 30, 2007
Launch Time: 15:13:15 p.m. EDT

NASA's Dawn spacecraft arrived at Astrotech Space Operations in
Titusville, Fla., on Tuesday at 9 a.m. for final prelaunch and
processing activities. The spacecraft was cleaned and inspected after
removal of the access panels.

Dawn's mission will be the first time a spacecraft will orbit two
planetary bodies on a single voyage: asteroid Vesta and the dwarf
planet Ceres. The Dawn spacecraft is managed by NASA's Jet Propulsion
Laboratory in Pasadena, Calif.

NASA's Launch Services Program at Kennedy Space Center and the United
Launch Alliance are responsible for the launch of the Delta II.

Offline Analyst

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Re: NASA - Dawn updates and discussion
« Reply #5 on: 04/15/2007 02:37 PM »
It would be nice to have some detailed spacecraft documents, the mission plan etc. Maybe something for L2.

Analyst

Offline jacqmans

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Re: NASA - Dawn updates and discussion
« Reply #6 on: 04/27/2007 09:10 PM »
Mission: Dawn
Launch Pad: Cape Canaveral Air Force Station, Fla.
Launch Vehicle: Delta II 7925-H
Launch Date: Targeted for June 30, 2007
Launch Time: 15:13:15 p.m. EDT

The "command and data handling" portion of the Comprehensive
Performance Test was completed on April 19. Additional comprehensive
performance tests are in progress. Thermal control system, attitude
control sub-system and fault protection testing continues.

Dawn's mission will mark the first time a spacecraft will orbit two
planetary bodies on a single voyage: asteroid Vesta and the dwarf
planet Ceres. NASA's Dawn spacecraft is managed by NASA's Jet
Propulsion Laboratory in Pasadena, Calif.

NASA's Launch Services Program at Kennedy Space Center and the United
Launch Alliance are responsible for the launch of the Delta II.


Offline Ankle-bone12

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Re: NASA - Dawn updates and discussion
« Reply #7 on: 04/29/2007 05:59 AM »
Question: What exactly is the Dawn spacecraft supposed to be doing that makes it so spaecial other than visiting two celestial bodies? In other words, what type of instruments does it contain?
Alex B.

Offline Jim

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Re: NASA - Dawn updates and discussion
« Reply #8 on: 04/29/2007 01:06 PM »
Quote
Ankle-bone12 - 29/4/2007  1:59 AM

Question: What exactly is the Dawn spacecraft supposed to be doing that makes it so spaecial other than visiting two celestial bodies? In other words, what type of instruments does it contain?

http://dawn.jpl.nasa.gov/
http://dawn.jpl.nasa.gov/technology/index.asp

Offline jacqmans

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Re: NASA - Dawn updates and discussion
« Reply #9 on: 05/07/2007 02:42 PM »
STATUS REPORT: ELV-050707

EXPENDABLE LAUNCH VEHICLE STATUS REPORT

Mission: Dawn
Launch Pad: Cape Canaveral Air Force Station, Fla.
Launch Vehicle: Delta II 7925-H
Launch Date: NET June 30, 2007
Launch Time: 15:13:15 p.m. EDT

Comprehensive spacecraft system performance testing continues.

Instrument final alignment is under way.

A test of the spacecraft's primary communications antenna is scheduled
for May 21.

The spacecraft solar arrays will be attached and deployed May 21 - 24.

No spacecraft issues or concerns have arisen during testing to date.

Offline simonbp

Re: NASA - Dawn updates and discussion
« Reply #10 on: 05/08/2007 07:30 PM »
Quote
Ankle-bone12 - 29/4/2007  12:59 AM

Question: What exactly is the Dawn spacecraft supposed to be doing that makes it so spaecial other than visiting two celestial bodies? In other words, what type of instruments does it contain?

Simply put: Dawn is the first mission specifically designed to go to the largest members of asteroid belt. Ceres and Vesta are both very large (Ceres is technically a dwarf planet now), and relatively unknown; oddly enough, we know far more about Triton, the distant captured KBO of Neptune, than Ceres, right in our own backyard.

The specific usefulness of looking at the small objects of the solar system is that they represent a much older stage in planetary evolution; like a geneticist studying bacteria. To that end, it carries a visual camera (build in Germany), a visual and infrared spectrometer for finding the surface composition (built in Italy), and a gamma and neutron spectrometer for probing the interior of Ceres and Vesta (built at Los Alamos). In addition, Dawn uses solar electric propulsion, providing yet another verification of this increasingly useful technology.

Simon ;)

Offline shuttlefan

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Re: NASA - Dawn updates and discussion
« Reply #11 on: 05/08/2007 09:04 PM »
Anyone know when they plan to start stacking the Delta?

Offline Jim

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Re: NASA - Dawn updates and discussion
« Reply #12 on: 05/09/2007 12:05 AM »
Quote
shuttlefan - 8/5/2007  5:04 PM

Anyone know when they plan to start stacking the Delta?

In the next few weeks

Offline jacqmans

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Re: NASA - Dawn updates and discussion
« Reply #13 on: 05/11/2007 08:43 PM »
STATUS REPORT: ELV-051107

EXPENDABLE LAUNCH VEHICLE STATUS REPORT

Mission: Dawn
Location: Astrotech Space Operations Facility
Launch Pad: 17-B
Launch Vehicle: Delta II 7925-H
Launch Date: NET June 30, 2007
Launch Time: 15:13:15 p.m. EDT

Mission system performance testing continues and is planned to finish
Friday.
A test of the spacecraft's primary communications antenna is scheduled
for May 21.

The spacecraft solar arrays will be attached and deployed May 21 - 24.

The spacecraft will be moved to Astrotech's Hazardous Processing
Facility for fueling on May 26.


Offline eeergo

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Re: NASA - Dawn updates and discussion
« Reply #14 on: 05/17/2007 05:16 PM »
<p>Stacking of the ULA's Delta II rocket for the Dawn mission has begun, with intial processing for first and second stages. There are some great images at KSC Media Archive

>BTW, it just occured to me... has there ever been a Delta II mission with no solid boosters attached to the first stage? I mean, just the main engine?</p>
« Last Edit: 08/13/2011 03:57 PM by Ronsmytheiii »
-DaviD-

Offline Jim

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Re: NASA - Dawn updates and discussion
« Reply #15 on: 05/17/2007 05:39 PM »
Deltas with letters for model designators

Delta,  A, B, C, F, H.  They had Thors for first stages

 Also some of the Thor Agenas had no solids

Offline jacqmans

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Re: NASA - Dawn updates and discussion
« Reply #16 on: 05/18/2007 09:10 PM »
STATUS REPORT: ELV-051807

EXPENDABLE LAUNCH VEHICLE STATUS REPORT

Mission: Dawn
Location: Astrotech Space Operations Facility
Launch Pad: 17-B
Launch Vehicle: Delta II 7925-H
Launch Date: Target June 30, 2007
Launch Window: 5:13:15 p.m. EDT

Preparations are under way for moving the Dawn spacecraft to an
adjacent clean room high bay for solar array integration.

Next week, the two spacecraft solar arrays, each consisting of four
panels, will be attached to the Dawn spacecraft and undergo
deployment testing. A solar array lighting test also will be
performed before the arrays are stowed for flight. This activity is
scheduled for May 21-24.

The spacecraft will be moved to Astrotech's Hazardous Processing
Facility for fueling on May 26.

The Delta II first stage will be hoisted into the launcher at Pad 17-B
on May 23 and attachment of the nine solid rocket boosters will
begin.

Offline eeergo

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Re: NASA - Dawn updates and discussion
« Reply #17 on: 05/19/2007 09:35 AM »

The chip with 360000 people's names (among who I'm included :) ) was positioned below the high gain antenna yesterday:

http://www-pao.ksc.nasa.gov/kscpao/images//medium/07pd1239-m.jpg" width="480" border="0" />

http://www-pao.ksc.nasa.gov/kscpao/images//medium/07pd1240-m.jpg" width="722" border="0" />

-DaviD-

Offline shuttlefan

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Re: NASA - Dawn updates and discussion
« Reply #18 on: 05/23/2007 01:31 PM »
The Delta II First stage should be on the pad today!

Offline Antares

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Re: NASA - Dawn updates and discussion
« Reply #19 on: 05/23/2007 07:41 PM »
Quote
shuttlefan - 23/5/2007  9:31 AM
The Delta II First stage should be on the pad today!
Too much wind.  Will try again tomorrow.
If I like something on NSF, it's probably because I know it to be accurate.  Every once in a while, it's just something I agree with.  Facts generally receive the former.

Tags: updates