Feeds

NASA's Sun-gazing sat is no-go

Solar Dynamics Observatory launch delayed

5 things you didn’t know about cloud backup

NASA canned today's planned launch of its Solar Dynamics Observatory from Cape Canaveral Air Force Station due to unfavourable wind conditions.

SDO will, once it gets aloft, "determine how the Sun’s magnetic field is generated, structured, and converted into violent solar events like turbulent solar wind, solar flares, and Coronal Mass Ejections".

This, the agency elaborates, will enhance our understanding of "space weather", and allow us to "accommodate or mitigate" the effects of solar activity, which can include knocking out satellites, affecting power grids and disrupting television and telecoms systems.

Artist's impression of SDO. Pic: NASA

SDO is packing three instruments: the Atmospheric Imaging Assembly (AIA); the Extreme Ultraviolet Variability Experiment (EVE); and the Helioseismic and Magnetic Imager (HMI).

AIA is tasked with grabbing hi-res pics of "different layers in the sun’s atmosphere to further understand how changing solar magnetic fields release the energy that heats the solar corona and creates flares".

It will "snap a full disk image in 8 wavelengths every 10 seconds" at a resolution of 4096 x 4096 px, or "almost IMAX quality", using four telescopes each capable of discerning detail as small as 725 km.

EVE is designed to gauge the sun’s extreme ultraviolet (EUV) brightness as often as "every ten seconds", and will provide space weather forecasters with "warnings of communications and navigation outages" provoked by sudden EUV surges.

HMI will measure both "sound waves reverberating inside the Sun to build up a picture of the interior", and "the strength and direction of magnetic fields emerging on the Sun’s surface". It will offer the "first rapid cadence measurements of the strength and direction of the solar magnetic field over the visible disk of the Sun".

The collected data will be dispatched to a dedicated ground station at New Mexico's White Sands Complex at a rate of roughly 1.5 terabytes a day, the equivalent of "downloading half a million songs each day", NASA helpfully explains.

SDO will operate in an inclined geosynchronous orbit at the "outer edges of Earth's radiation belt", around 36,000 km out. The orbit allows "nearly continuous, high data-rate contact" with the ground station, but will involve two annual "Earth shadow" eclipses, of 2-3 weeks each, and "three lunar shadow events each year", the agency notes.

NASA has its main SDO site here, a fact sheet here (pdf), handy guide here (pdf) and press kit here (pdf). ®

Build a business case: developing custom apps

More from The Register

next story
Boffins ID freakish spine-smothered prehistoric critter: The CLAW gave it away
Bizarre-looking creature actually related to velvet worms
ANU boffins demo 'tractor beam' in water
The current state of the art, apparently
China to test recoverable moon orbiter
I'll have some rocks and a moon cheese pizza please, home delivery
NASA's rock'n'roll shock: ROLLING STONE FOUND ON MARS
No sign of Ziggy Stardust and his band
What does a flashmob of 1,024 robots look like? Just like this
Sorry, Harvard, did you say kilobots or KILLER BOTS?
Why your mum was WRONG about whiffy tattooed people
They're a future source of RENEWABLE ENERGY
Vulture 2 spaceplane autopilot brain surgery a total success
LOHAN slips into some sexy bespoke mission parameters
Another step forward for diamond-based quantum computers
Square cut or pear-shaped, these qubits don't lose their shape
LOHAN acquires aircraft arboreal avoidance algorithm acronyms
Is that an ARMADILLO in your PANTS or are you just pleased to see me?
prev story

Whitepapers

Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Solving today's distributed Big Data backup challenges
Enable IT efficiency and allow a firm to access and reuse corporate information for competitive advantage, ultimately changing business outcomes.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.