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Hi-C to Show the Sun’s Corona in Sharp Detail

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Posted July 20, 2016

The launch of the Hi-C payload on a NASA Black Brant IX suborbital sounding rocket has been postponed.  A new launch date has not been determined.  The team discovered a potential payload system issue during pre-launch testing.  The team is currently assessing the problem.

NASA and its partners are getting ready to launch a rocket-borne camera to the edge of space at 12:36 p.m. Mountain time on July 19, 2016, on its second flight to study the sun. The clarity of images returned will provide scientists around the world with clues to one of the biggest questions in heliophysics – why the sun’s atmosphere, or corona, is so much hotter than its surface.

Patrick Champey (University of Alabama – Huntsville graduate student), Richard Gates and William Podgorski (Smithsonian Astrophysical Observatory) complete an alignment procedure on the Hi-C instrument in a clean room at the National Space Science Technology Center in Huntsville, Alabama, prior to shipping to White Sands Missile Range in New Mexico for its July 19, 2016, launch. Credits: NASA/MSFC/Emmett Given

Patrick Champey (University of Alabama – Huntsville graduate student), Richard Gates and William Podgorski (Smithsonian Astrophysical Observatory) complete an alignment procedure on the Hi-C instrument in a clean room at the National Space Science Technology Center in Huntsville, Alabama, prior to shipping to White Sands Missile Range in New Mexico for its July 19, 2016, launch.
Credits: NASA/MSFC/Emmett Given

The precision instrument, called the High Resolution Coronal Imager, or Hi-C, will fly aboard a Black Brant sounding rocket, lifting off July 19 from White Sands Missile Range in New Mexico.

“Our team, which includes partners foreign and domestic, have done incredible work to get us ready for launch,” said Jonathan Cirtain, principal investigator for Hi-C and manager of the Science Research Office at NASA’s Marshall Space Flight Center in Huntsville, Alabama. “The instrument has demonstrated the power of high resolution coronal imaging and we expect to demonstrate that conclusively July 19. We are ‘go’ for launch.”

Scientists anticipate Hi-C’s reflight will deliver images that could help explain why the corona is so hot. The sounding rocket will fly into space for only five minutes of observation time — but those five minutes can provide key information, because the observations occur up above Earth’s atmosphere, which blocks the extreme ultraviolet sun rays that hold information necessary to untangle the coronal heating mystery.

Hi-C payload team members conduct the payload final sequence test at the White Sands Missile Range. Credits: NASA/Ted Gacek

Hi-C payload team members conduct the payload final sequence test at the White Sands Missile Range.
Credits: NASA/Ted Gacek

During its first flight in July 2012, Hi-C captured the highest-resolution images ever taken of the million-degree solar corona, revealing previously unseen magnetic activity. For decades, scientists have suspected that activity in the sun’s magnetic field is heating the corona.

“The magnetic field plays a crucial role in dictating the structure of the sun’s atmosphere,” said Cirtain. “It also acts as a conduit for mass and energy to flow into the solar corona and solar wind – some of it heading toward Earth as powerful solar flares that can disrupt radio and GPS communications. It’s critical to understand the process by which the sun releases these bursts of energy.”

The telescope, the centerpiece of a payload weighing 464 pounds and measuring 10-feet long, is designed to observe a large, active region in the sun’s corona in fine detail. The telescope will acquire data for five minutes, taking about one image every five seconds.

Source: NASA

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