Bookmark Kaumudi Online  Bookmark this site  Editor@Kaumudi  |  Marketing  Print Advt rates  |  Calendar 2018        Go!    
 
 
June 20, Wednesday 2018 9:06 PM       

       HEADLINES: Hartal in Idukki on June 25                                              Landslides: Compensation to be given in installments                                              Sreejith’s is not first custodial death in Kerala: CM                                              Big comrade in Varappuzha case should be caught: Chennithala                                              Farmer’s loan fraud: Fr Peelianikkal remanded                                              Agri budget to double farm income by 2022: PM Modi                                              Governor's rule imposed in J-K                                              18K banks, post offices have Aadhaar facility: UIDAI                                              India and France to build strong development partnership: Swaraj                                              Merkel gets ultimatum from hardline ally over migrants                                              Merkel, Macron search for reforms to halt EU 'disintegration'                                              My hardest day in cricket: Paine post England drubbing                                              Kaumudi Facebook
       SCI&TECH Next Article: Signs of life detected below world's deepest point  
       NASA images show how India looks from space at night
 
         Posted on :18:06:54 Apr 13, 2017
   
A A
       Last edited on:18:06:54 Apr 13, 2017
         Tags: NASA images, how India looks, space at night
 
WASHINGTON: NASA today released new global nighttime images of the Earth - including a detailed view of India and its surroundings that show how patterns of human settlement changed across the country between 2012 and 2016.
 
The new images compare the composite night-time view of India and its surrounding areas in 2016 with that of 2012.
 
The two images show how cities have grown and patterns of human settlements have changed across the country during those years, NASA said.
 
Satellite images of Earth at night - often referred to as "night lights" - have been a source of curiosity for public and a tool for fundamental research for nearly 25 years.
They provide a broad, beautiful view, showing how humans have shaped the planet.
 
Produced every decade or so, such maps have spawned hundreds of pop-culture uses and dozens of economic, social science and environmental research projects.
 
A research team led by Earth scientist Miguel Roman of NASA's Goddard Space Flight Centre in the US plans to find out if night lights imagery could be updated yearly, monthly or even daily.
 
In the years since the 2011 launch of the NASA-NOAA Suomi National Polar-orbiting Partnership (NPP) satellite, researchers have been analysing night lights data and developing new software and algorithms to make night lights imagery clearer, more accurate and readily available.
 
They are now on the verge of providing daily, high- definition views of Earth at night, and are targeting the release of such data to the science community later this year.
 
Since researchers from the National Oceanic and Atmospheric Administration and NASA released a new Earth at night map in 2012, Roman and teammates at NASA's Earth Observing Satellite Data and Information System (EOSDIS) have been working to integrate nighttime data into NASA's Global Imagery Browse Services (GIBS) and Worldview mapping tools.
 
The new global composite map of night lights was observed in 2016. The NASA group has examined the different ways that light is radiated, scattered and reflected by land, atmospheric and ocean surfaces.
 
The principal challenge in nighttime satellite imaging is accounting for the phases of the Moon, which constantly varies the amount of light shining on Earth, though in predictable ways.
 
Likewise, seasonal vegetation, clouds, aerosols, snow and ice cover, and even faint atmospheric emissions (such as airglow and auroras) change the way light is observed in different parts of the world.
 
The new maps were produced with data from all months of each year. The team wrote code that picked the clearest night views each month, ultimately combining moonlight-free and moonlight-corrected data.
 
Suomi NPP observes nearly every location on Earth at roughly 1:30 pm and 1:30 am (local time) each day, observing the planet in vertical 3,000-kilometre strips from pole to pole. Suomi NPP data is freely available to scientists within minutes to hours of acquisition.
 
Armed with more accurate nighttime environmental products, the NASA team is now automating the processing so that users will be able to view nighttime imagery within hours of acquisition.
 
This has the potential to aid short-term weather forecasting and disaster response.
A A
       SCI&TECH
Next Article: Signs of life detected below world's deepest point
 
 
SCI&TECH HEADLINES
Spironolactone can help prevent acne: Study  
Older Amazonian forests help regulate global climate  
Goal conflict linked to depressive symptoms  
A new world: Top 10 new species for 2018  
Beat the risk of frailty with healthy heart  
Twitter to hide trolls that hurl abuse: Twitter CEO  
Fortnite is finally coming to Android  
This test could detect signs of pancreatic cancer  
Aliens exist but may be in parallel Universe: Study  
This is your heart on nitric oxide  
Is your kid's heart clock ticking right?  
Do at-risk adolescents show depressive symptoms on social media?  
NASA launches Insight spacecraft to Mars for deepest dig yet  
Daily intake of this drug can cause certain cancers in men  
A new weapon against epilepsy  
Hail stone weighing three kg sign of climate change: Expert  
PMSing? Could be because of alcohol!  
Social media firms given a week to better protect kids  
The stronger you are, the healthier your brain is  
NASA may soon identify 2,400 alien planets  
What triggers depression among adults?  
Turn your hobbies into part-time job opportunities with these apps  
Apple launches special RED Edition for iPhone 8, 8 Plus  
Humanity’s first flight to Sun to launch in July: NASA  
This World Health Day, let's focus on eye health  
 
Do you think electric bus will be a success in Kerala?
Yes
 
No
 
No opinion
 
 
 
Home Kerala India World Business Sports Sci&Tech Education Automobile CityNews Movies Environment Letters 
© Copyright keralakaumudi Online 2011  |  Reproduction in whole or in part without written permission is prohibited.
Head Office Address: Kaumudi Buildings, Pettah P.O, Trivandrum - 695024, India.
Online queries talk to Deepu Sasidharan, + 91 98472 38959 or Email deepu[at]kaumudi.com
Customer Service -Advertisement Disclaimer Statement   |  Copyright Policy