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  Satellites - Robotic Probes
  Upper Atmospheric Research Satellite (UARS) (Page 2)

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Author Topic:   Upper Atmospheric Research Satellite (UARS)
Robert Pearlman
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From: Houston, TX
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posted 09-24-2011 05:49 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
collectSPACE
NASA UARS satellite likely hit ocean, but location of debris still unknown

NASA's largest satellite to fall to Earth uncontrolled in more than 30 years is believed to have splashed down in the Pacific Ocean. But lacking any credible eyewitness reports, the space agency is not sure where exactly its 6-ton satellite re-entered, let alone where it dropped its debris, and may in fact, never know.

Philip
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From: Brussels, Belgium
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posted 09-25-2011 08:29 AM     Click Here to See the Profile for Philip   Click Here to Email Philip     Edit/Delete Message   Reply w/Quote
Check: UARS Final Groundtrack (473 KB PDF)

issman1
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From: UK
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posted 09-25-2011 10:50 AM     Click Here to See the Profile for issman1     Edit/Delete Message   Reply w/Quote
Could this be an authentic video of the final moments of UARS (which would be the most convincing)?

I'm also curious if the NASA astronaut who deployed UARS during STS-48, Mark Brown, had anything to say about its demise.

Robert Pearlman
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From: Houston, TX
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posted 09-25-2011 11:17 AM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by issman1:
Could this be an authentic video of the final moments of UARS (which would be the most convincing)?
Looks to be a low quality copy of ESA's ATV Jules Verne's reentry video.

issman1
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posted 09-25-2011 11:55 AM     Click Here to See the Profile for issman1     Edit/Delete Message   Reply w/Quote
Indeed. Unfortunately, mischievous characters are reposting online footage of past spacecraft re-entries. It appears UARS made planetfall over the Pacific.

Glint
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From: New Windsor, Maryland USA
Registered: Jan 2004

posted 09-25-2011 06:52 PM     Click Here to See the Profile for Glint   Click Here to Email Glint     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by issman1:
Could this be an authentic video of the final moments of UARS (which would be the most convincing)?
The characteristics of the video and the description posted with it make that conclusion unlikely. Even without knowing which video the hoaxer pilfered, there are clues that raise reasonable doubts.

Here's an illustration of what was probably the final orbit of UARS based on then current (epoch 23 September, 2011) orbital elements. Used the Orbitron program to generate the graphic:

The position shows UARS off the U.S. Pacific coast on 24 Sep. 2011 at 04:16 UTC, the time of impact according to Aerospace & Defense News.

A rough translation of the text accompanying the video indicates it was shot near the "North Pacific Ocean coast west of the United States." The re-entering vehicle in the video is shown traveling from right to left. This indicates that the observer was north of the ground track facing south. As shown on the map, the countries in that region, such as Canada, do not speak Portuguese.

Robert Pearlman
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From: Houston, TX
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posted 09-26-2011 08:43 AM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
The Calgary Herald reports that an aspiring Calgary filmmaker has admitted to starting the hoax that UARS debris fell in Okotoks.
Sebastian Salazar will openly admit he's no Orson Welles, but for one night, he tried his best Welles impression.

Salazar was the source of the social media hoax that started Friday night of a NASA satellite crashing into a farmers field near Okotoks, all using his Twitter account @imnotgonnalie2u and profile picture of a winky face.

"I didn't say it was a spoof but I made it pretty obvious," he said.

It was strikingly similar to Welles' 1938 War of the Worlds broadcast that created hysteria in the United States. In fact, the aspiring filmmaker used direct quotes straight from the radio broadcast.

"If it worked for Orson Welles in 1938, I wanted to see if it worked on Twitter in 2011," he said. "I'm certainly no Orson Welles, I just took his stuff and remixed it for 2011."

It started off with "Reporter Carl Phillips" on the scene of "Wilmuth farm" with the debris, both lifted from Welles. Salazar painted a picture of the satellite crashing into earth; ending up "half buried in a vast pit. Must have struck with terrific force" he wrote.

He even posted a picture of the so called debris, made of spare parts he found in his house.

"There is no reason that people shouldn't have picked up on it as a hoax," he said.

Robert Pearlman
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From: Houston, TX
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posted 09-27-2011 12:36 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
UARS update
Final Update: NASA's UARS Re-enters Earth's Atmosphere

NASA's decommissioned Upper Atmosphere Research Satellite fell back to Earth at 12:01 a.m. EDT (0401 GMT) on Saturday, Sept. 24.

The Joint Space Operations Center at Vandenberg Air Force Base in California has determined the satellite entered the atmosphere over the Pacific Ocean at 14.1 degrees south latitude and 189.8 degrees east longitude. This location is over a broad, remote ocean area in the Southern Hemisphere, far from any major land mass.

The debris field is located between 300 miles and 800 miles downrange, or generally northeast of the re-entry point. NASA is not aware of any possible debris sightings from this geographic area.

Robert Pearlman
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From: Houston, TX
Registered: Nov 1999

posted 09-27-2011 03:12 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
collectSPACE
NASA pinpoints where UARS satellite fell; debris sank in remote Pacific

Three days after saying we might never know when and where a six-ton spacecraft hit Earth, NASA pinpointed on Tuesday the exact time and location where its Upper Atmosphere Research Satellite (UARS) re-entered the atmosphere and dropped its debris.

Jay Chladek
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From: Bellevue, NE, USA
Registered: Aug 2007

posted 09-29-2011 01:11 AM     Click Here to See the Profile for Jay Chladek   Click Here to Email Jay Chladek     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by music_space:
If its research efforts come to fruition, the Robotic Refueling Mission (RRM), a demonstration using Canadian-made Special Purpose Dexterous Manipulator, or Dextre, a satellite such as UARS could in the future be refueled instead of having to be decommissioned when out of maneuvering propellants.
Propellant isn't the only factor that determines the life of a satellite. Computers get old (and cosmic rays can burn out a sector of memory on a chipset pretty easily), batteries lose life and most importantly, solar arrays lose their ability to generate required electricity over their lifetimes.

With the Salyut 6 mission, mid-way through its life, the Soviets had to bolt on supplementary solar arrays since the original ones were wearing out. Granted later solar array designs got better, but things do still wear out.

In fact, one of the problems with the early generation GPS satellites (which are just as old as UARS if not older) that are still operating is US STRATCOM has had to deactivate their secondary nuclear explosion detection capability as they only have the energy generation capability to power either the GPS system or the detectors, but not both.

But still, it is nice that somebody is thinking about extending the life of satellites in orbit and I can see the refueling test on the ISS as a good step in the right direction. Now if somebody could also come up with an effective way to sweep space debris out of certain orbits, that would go a long way towards revolutionizing the utilization of Earth orbit.

MrSpace86
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From: Gardner, KS, USA
Registered: Feb 2003

posted 09-29-2011 01:44 PM     Click Here to See the Profile for MrSpace86   Click Here to Email MrSpace86     Edit/Delete Message   Reply w/Quote
It's somewhat sad that this sort of space news is what gets people and the media excited (or scared, whatever they feel) about spaceflight.


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