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How to watch NASA's Mars 'flying saucer' test

NASA's Low-Density Supersonic Decelerator is scheduled to be tested in Hawaii on Thursday. Here's how you can watch it.

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    The second flight test of NASA's Low-Density Supersonic Decelerator (LDSD) will be attempted on Tuesday, June 2 at no earlier than 1:30 p.m. EDT (7:30 a.m. HST), launching a rocket-powered, saucer-shaped test vehicle into near-space from the Pacific Missile Range Facility on the island of Kauai in Hawaii.
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NASA now aims to launch a flight test Thursday (June 4) of an innovative "flying saucer" that could help humans land on Mars in the future, and you can watch the dramatic action live.

The space agency's Low-Density Supersonic Decelerator (LDSD) test vehicle is scheduled to launch from the Hawaiian island of Kauai no earlier than 1:30 p.m. EDT (1730 GMT; 0730 local Hawaiian time) on Thursday, borne aloft by a giant balloon. You can watch the test live on Space.com, courtesy of NASA TV, beginning at 1 p.m. EDT (1700 GMT). The launch was originally slated for Tuesday, but NASA delayed the flight test twice, first to Wednesday and then to Thursday, due to rough ocean conditions. 

Once launched, it will take more than two hours for the balloon to get high enough for the LDSD test to proceed, so you'll have to be patient. Coverage of the flight test will likely cut out about 30 minutes after liftoff, then resume 20 minutes before the LDSD test vehicle is dropped from the balloon and begins flying freely, NASA officials said. [NASA's 2nd  "Flying Saucer" Test for Mars Landings (Photos)]

The LDSD system consists of a saucerlike "supersonic inflatable aerodynamic decelerator" (SIAD), along with a 100-foot-wide (30 meters) supersonic parachute. Together, this equipment is designed to help get superheavy payloads, including human habitat modules, down safely on the surface of Mars.

NASA's current Mars-landing tech can handle equipment no heavier than 1 ton or so, space agency officials have said. This current gear — a rocket-powered "sky crane" paired with a 51-foot-wide (15 m) parachute — was thus pretty much maxed out by NASA's Curiosity rover, which touched down on the Red Planet in August 2012. 

If all goes according to plan Thursday, the 400-foot-wide (122 m) balloon will ascend to about 120,000 feet (36,580 m), then drop the 7,000-lb. (3,175 kilograms) LDSD test vehicle. The craft's onboard rocket engine will kick on at that point, boosting the vehicle up to 180,000 feet (54,860 m). (Earth's atmosphere at such high altitudes is a good analogue for Mars' thin air, LDSD mission team members have said.)

The SIAD will then inflate, rapidly reaching 20 feet wide (6 m), while the LDSD vehicle is going about three times the speed of sound (Mach 3). The resulting increase in drag will help slow the test craft down to Mach 2.35, at which point the huge parachute will deploy, allowing the vehicle to make a soft splashdown in the Pacific Ocean.

Thursday's planned test will be the second LDSD flight; the first lifted off last June, also from Kauai. The parachute was torn apart shortly after deployment during last year's trial. This second test will feature a modified, stronger version of the supersonic chute, LDSD team members said.

While NASA hopes to launch the LDSD vehicle Thursday, uncooperative weather may well push the test back by several days. Indeed, the test was originally scheduled for Tuesday (June 2), but mission team members postponed it twice because ocean wave heights were too high for safe vehicle-recovery operations, NASA officials said. 

"I'm hopeful that by the end of the week or by early next week, we'll have some better opportunities," LDSD project manager Mark Adler, of NASA's Jet Propulsion Laboratory in Pasadena, California, said during a prelaunch briefing Monday (June 1). 

The current LDSD launch window runs through June 12. A second window is also available from July 7 through July 17.

Follow Mike Wall on Twitter @michaeldwall and Google+. Follow us @SpacedotcomFacebook orGoogle+. Originally published on Space.com.

Copyright 2015 SPACE.com, a Purch company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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