Android Century
  • Home
  • Android Zone
    • Android Apps
    • Android Games
    • Apps APk Files
    • Games Apk Files
    • Apps Hack Tricks
  • Reviews
  • Fantasy Zone
    • Entertainment
    • Quotes and Status
    • Life Style
    • Home Made Tips
    • Hair Care
    • Skin Care
    • Fantasy Tips
  • Tricks
    • Free Recharge
    • Free Internet
    • shopping Cashback
    • Recharge Cashback
  • Tech
  • Mobiles
  • Gadgets
  • News
  • How To's
  • Software
Breaking
Loading...

Featured post

How to Take Great Photos With Apple's iPhone X

Recent Posts

Labels

  • Android Apk Files
  • Android Apps
  • Android Games
  • Apps Apk Files
  • Entertainment
  • Fantasy Tips
  • Gadgets
  • Hair Care
  • HomeMade Tips
  • How To's
  • News
  • Quotes
  • Quotes & Status
  • Recharge Cashback
  • Recharge Promo Codes
  • Shopping Cashback
  • Technology
  • skin care
Home / News / Nasa's new stopwatch measures a fraction of a billionth of a 2nd

Nasa's new stopwatch measures a fraction of a billionth of a 2nd

Latest Govt. Jobs 21:38:00 News Edit
In space, things happen very slowly and very quickly. Slow events are timed with technology that we've had for centuries - calendars and clocks. But timing fast events - which happen on the scale of billionths of a second - is more difficult.
That was a problem that Nasa engineers faced when they designed the Ice, Cloud and land Elevation Satellite-2, known as ICESat-2 for short. It's a spacecraft designed to measure the height of different objects - sea ice, glaciers, ice sheets, forests, clouds and more, on the Earth's surface.

Lasers are fired

To obtain accurate measurements, it uses six green laser beams in an instrument called the Advanced Topographic Laser Altimeter System (ATLAS). Those lasers are fired at the surface of the Earth, bounce off, and return - and the time it takes to return changes depending on the height of that surface.
But that came with a problem. 
"Light moves really, really fast, and if you’re going to use it to measure something to a couple of centimeters, you’d better have a really, really good clock," said Tom Neumann, ICESat-2’s deputy project scientist.
So they built a really, really good clock - capable of an accuracy of a fraction of a billionth of a second. It's triggered by redirecting a few of the photons of the laser into a pulse detector, which then tells the satellite to log exactly where it is in space.
With that information, it then calculates a rough estimate of how long it should take for the laser pulse to return, using already-existing information about the height of the terrain below. Over the Himalayas, for example, the laser pulse should return faster than over the Netherlands.

Ultrastable oscillator

When the pulse does return, it's passed through a filter that removes all photons except the ones exactly matching the green of the laser. 
They're then counted, and the time it took them to return is measured using anultrastable oscillator - a tiny crystal that 'ticks' 100 million times a second. Those ticks are then subdivided further with electronics on the photon counters - resulting in an accuracy level of hundreds of picoseconds.
Repeating this process hundreds of times a second, and measuring the same piece of land multiple times, you're able to get a highly-accurate reading of exactly how high the terrain is below. 
"If you know where the spacecraft is, and you know the time of flight so you know the distance to the ground, now you have the elevation of the ice," said Phil Luers, deputy instrument system engineer with the ATLAS instrument.
Share on Facebook Share on Twitter Share on Google Plus

RELATED POSTS


Vivo V9 with dual rear cameras

Xiaomi Redmi 5 launch

Vodafone partners with Tecno to off...
Nasa's new stopwatch measures a fraction of a billionth of a 2nd Nasa's new stopwatch measures a fraction of a billionth of a 2nd Reviewed by Latest Govt. Jobs on 21:38:00 Rating: 5

0 comments:

Post a Comment

Newer Post Older Post Home
Subscribe to: Post Comments ( Atom )

Search This Blog

TEST BOOK FOR GOVT ENTRANCE TEST

TEST BOOK FOR GOVT ENTRANCE TEST
Find All Latest book for preparation of SSC,RAILWAYBANK PO,RBI,BANK CLERK,GATE ME,GATE CE are available here in less prices, to check out the books click here

Translate

  • Popular Post
  • Random posts
  • Category

Popular Posts

  • Teen Patti Offer 2018: Refer and Earn Flipkart Vouchers Free
    Teen Patti Offer 2018: Refer and Earn Flipkart Vouchers Free
    Teen Patti Refer & Earn Offer:  Hey Guys! Today I make an article about Teen Patti Referral ...
  • Hands-on with the home windows 10 Creators update for the Xbox One: Beam recreation streaming arrives
    The Windows 10 Creators Update is here, now—yes,  now —but not (officially) on the PC. The ...
  • Taotronics TT-BH22 Headphones Review
    We make it a addiction to now not look up pricing of a product sooner than reviewing and if ...
  • Jio effect: Telcos may have to cut data rates 2017
    India's big  telecom  companies,  Bharti Airtel ,  Vodafone India  and  Idea Cellular , will be ...
  • How To Install Xposed Framework On Bluestacks
    How To Install Xposed Framework On Bluestacks
    How To Install Xposed Framework On Bluestacks For Rooted Bluestacks Only Requirements: ...
  • WhatsApp now lets you search for GIFs from within its interface
    Spicing up your conversations with GIFs is easier than ever before. The latest update ...

Random Posts

  • Now Refer 2 Friends And Earn 1$ Easily & Earn Unlimited Real Money [Unlimited Trick Updated ]
    Now Refer 2 Friends And Earn 1$ Easily & Earn Unlimited Real Money [Unlimited Trick Updated ]
    05.03.2017 - 0 Comments
    Hey fellas , Previously We posted Just Dial -Refer and Earn  And Many of Us…
  • India's motor bill may overtake state regulations for cab aggregators like Ola, Uber
    India's motor bill may overtake state regulations for cab aggregators like Ola, Uber
    23.03.2017 - 0 Comments
    Tamil Nadu may be the latest one to join the group of states which have formulated regulations for app-based…
  • New Torment: Tides of Numenera review: The Planescape successor you've been waiting for
    New Torment: Tides of Numenera review: The Planescape successor you've been waiting for
    01.03.2017 - 0 Comments
    If only Torment: Tides of Numenera were twice as long. I don’t say that about many…
  • LG Watch Style and LG Watch Sport Officially Introduced with Android Wear 2.0
    LG Watch Style and LG Watch Sport Officially Introduced with Android Wear 2.0
    14.02.2017 - 0 Comments
    Over the last few days a lot of graphic material and details surfaced about two new LG smartwatches.…
  • Latest  Nokia 3310 (2017) review
    Latest Nokia 3310 (2017) review
    02.03.2017 - 0 Comments
    Nokia VERDICT For those who fondly remember the Nokia 3310 the new model will almost be a no-brainer of…

Labels

Android Apk Files Android Apps Android Games Apps Apk Files Apps Hack Tricks Entertainment Free Internet Freecharge Gadgets Games Apk Files How To's Laptops Guide Mobiles Reviews Technology Viral's android zone free recharge

Entertainment

Tricks

Popular Posts

  • BenQ’s flagship photographer SW320 4K monitor in India costs Rs 1.25 lakh
    BenQ has launched ...
  • How To Install Xposed Framework On Bluestacks
    How To Install Xposed Framework On Bluestacks
    How To ...
  • WhatsApp now lets you search for GIFs from within its interface
    Spicing up your ...
  • (no title)
    I’m thinking of ...
  • Sony Xperia XZs first impressions: At Rs 49,990 every other ‘top rate’ supplying
    Sony Xperia XZs is ...
  • How to Test Your Internet Speed from the Command Line
    How to Test Your Internet Speed from the Command Line
  • Alone Time Is Good For Us, Research Says
    Our world is more ...

Random Posts

  • German court has fined Facebook $109,000 in IP dispute cWindows 10 Defender program will alerts users for malicious attacks
    German court has fined Facebook $109,000 in IP dispute cWindows 10 Defender program will alerts users for malicious attacks
    03.03.2016 - 0 Comments
    Windows 10 Defender program will alerts users for malicious attacks: The upgraded operating system comes…
  • Report: Samsung is bringing an updated Galaxy Tab S to Mobile World Congress
    Report: Samsung is bringing an updated Galaxy Tab S to Mobile World Congress
    12.02.2017 - 0 Comments
    While 2016 might not have been a great year for tablets, things are starting to look up for 2017.…
  • Google Android O: Top features, release date
    Google Android O: Top features, release date
    20.08.2017 - 0 Comments
    Android O: Here’s everything we need to know about the next version of Google’s mobile operating system. At…
  • Amazon and Netflix are finally Oscar winners - streaming tech comes of age
    Amazon and Netflix are finally Oscar winners - streaming tech comes of age
    01.03.2017 - 0 Comments
    As the biggest of all the film awards ceremonies, the Oscars work as a great litmus test for the film…
  • Got a new Android phone? Here's how to properly get rid of your old one
    Got a new Android phone? Here's how to properly get rid of your old one
    11.02.2017 - 0 Comments
    Whether you got a smartphone under the tree or just plan to gift yourself a handset soon, we hope the joy…

Most Popular

  • Teen Patti Offer 2018: Refer and Earn Flipkart Vouchers Free
    Teen Patti Offer 2018: Refer and Earn Flipkart Vouchers Free
    Teen Patti Refer & ...
  • SAMSUNG GALAXY J7 (2016) REVIEWS
    SAMSUNG GALAXY J7 (2016) REVIEWS
    SAMSUNG GALAXY J ...
  • Top 5 Best SmartPhones under 7000 Rs (March 2017)
    Looking for the ...
  • Apple, IBM, Cisco are huge because of Indians, do not deny them H-1B visa: RBI Governor Urjit Patel
    ...
  • SAMSUNG GALAXY J7 (2016) Specifications
    SAMSUNG GALAXY J ...
  • BlackBerry Teases Marshmallow Beta Testing for Priv by Next Week
    Blackberry ...
  • LG Q6 Review
    LG Q6 Review
    2017 is ...

Contact Form

Name

Email *

Message *

Offers Zone

Created By Android Century Distributed by Android Century
  • Home
  • About us
  • Contact us
  • Privacy policy
  • Terms of use
  • Advertise here
Subscribe Via Email Subscribe To Android Century By Email And Get Free Updates. ;-)


Your email address is safe with us!