Subscribe free to our newsletters via your
  GPS News  




Subscribe free to our newsletters via your




















GPS NEWS
2 SOPS says goodbye to GPS satellite
by Senior Airman Arielle Vasquez, 50th Space Wing Public Affairs
Schriever AFB CO (SPX) Apr 26, 2017


An artist's rendering of the GPS Block IIA. For a larger version of this image please go here.

At 25-years old, Global Positioning System Satellite Vehicle Number 27 completed its time in orbit before the 2nd Space Operations Squadron said goodbye via final command and disposal here April 18. SVN 27 was launched in 1992, meaning it performed more than triple its design life of 7.5 years.

"The most interesting thing about this process for me, was the ability to do some experimentation and advance training prior to the disposal," said 1st Lt. Cameron Smith, 2 SOPS bus subsystem analyst. "Experimentation started in mid-March which consisted of advance training opportunities and vehicle component validation. This was very exciting and new to a lot of people in 2 SOPS."

Smith explained underperforming satellites, such as SVN 27, are removed from the GPS constellation to make room for satellites with increased capability.

Since GPS satellites do not carry the amount of fuel required for de-orbit maneuvers, they are instead pushed to a higher orbit, roughly 1,000 kilometers above the operational GPS orbit.

During the final contact with the vehicle, the satellite is commanded into the safest, lowest energy state possible. This means all fuel has been depleted from the fuel tanks, the batteries are unable to hold a charge and the vehicle is in a spin-stabilized configuration.

Bus component degradations and navigational issues, among other reasons, usually kill a satellite. Fortunately for SVN 27, there were no major flaws throughout its life span.

"SVN 27 was disposed of because its navigation payload could no longer perform up to the GPS standards," said 1st Lt. Shannon Sewell, 2 SOPS subsystem analysis chief. "In 1993, a year after it launched, it had a suspect component we never tested out until we disposed of it. The decoder wasn't fully powered. Since it was a backup, we made a decision to leave it in the same configuration. However, this did not cause any major effects during its life span."

In the last two years, the unit conducted six disposal operations. For Sewell, even though she has witnessed final commands given during past disposal operations, this marked the first time she sent the kill command.

"It's a rite of passage to send out the last command to vehicles," said Sewell. "This was my sixth and final disposal in the shop before I move on, but the first kill command I sent. It was a great way to end my tenure here and was a unique opportunity."

So far, there have been 28 disposal operations in 2 SOPS history, which support the Air Force's GPS modernization efforts.

GPS NEWS
Researchers working toward indoor location detection
Houston TX (SPX) Apr 18, 2017
Rice University computer scientists are mapping a new solution for interior navigational location detection by linking it to existing sensors in mobile devices. Their results were presented in a paper at last month's 2017 Design, Automation and Test in Europe (DATE) Conference in Lausanne, Switzerland. Six months ago, the same researchers published a paper on their first technology for a n ... read more

Related Links
Schriever AFB
GPS Applications, Technology and Suppliers

Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

GPS NEWS
China-bound illegal donkey hide haul seized in Pakistan

When Nature vents her wrath on grapes

Rivers of blood orange: Juice floods Russian town

A novel form of iron for fortification of foods

GPS NEWS
Molecular libraries for organic light-emitting diodes

New quantum liquid crystals may play role in future of computers

Graphene 'copy machine' may produce cheap semiconductor wafers

New form of matter may hold the key to developing quantum machines

GPS NEWS
China's HNA buys stake in Rio airport: Brazil official

'Personal flying machine' maker plans deliveries this year

Pressurized Perlan glider reaches new high altitude on journey to edge of space

Kazakhstan buys two more Airbus C295 aircraft

GPS NEWS
Free rides offered by Alphabet's Waymo autonomous cars

Uber sets 'flying car' launch for 2020

Rideshare rivals Gett, Juno join forces

China's Didi 'most valuable Asian start-up'; Uber exec demoted

GPS NEWS
Trump targets aluminum in week of trade tensions

Canada's Trudeau says will stand up to Trump on trade

Israel signs deal to bring in 6,000 Chinese labourers

Japan's exports jump in March

GPS NEWS
Scientists examine impact of high-severity fires on conifer forests

Trump looks to lift protections on America's vast nature preserves

Primeval forest risks sparking new EU-Poland clash

Trump moves to review status of America's nature preserves

GPS NEWS
Beautiful Bering Strait image captured by Copernicus Sentinel-3A satellite

When Swarm met Steve

'Detergent' Molecules May Drive Recent Methane Changes

Banned industrial solvent sheds new light on methane mystery

GPS NEWS
Self-assembled nanostructures can be selectively controlled

Nanotubes that build themselves

Nanoparticles remain unpredictable

Better living through pressure: Functional nanomaterials made easy




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement