Bargain Basement Satellites
Huntsville AL (SPX) Nov 20, 2007 Looking for a cheap fare 'round the world? Your search is over. A NASA team has built a small, low-cost satellite called FASTSAT, and it's almost ready to fly. Need some details before you sign up? Read on.
Why is it called FASTSAT? "That's unheard of," says Marshall Space Flight Center's Edward "Sandy" Montgomery, "to build something that will fly in space in that short time frame and for that amount of money. But that was part of our experiment - to see if it could be done." The full name says it all: Fast, Affordable, Science and Technology SATellite.
How did they do it? Balloon missions taught the team some specific ways to save time and money. For instance, they used commercial off-the-shelf components, which are readily available and cheaper than specially ordered parts. "We also did some scrounging and got some items left over from other programs," says Montgomery. "There's nothing fancy on this satellite." They even built the satellite out of aluminum instead of expensive titanium. And they used a design so simple "even a cave man could do it." The design required few cuts in the metal, so fabrication was fast. FASTSAT is safe as well as simple. Magnets provide its attitude control instead of jets, so there are no propellants onboard to offgas or explode. The satellite has no moving parts - no blades or momentum wheels whirring around. All of these factors add up to subtract cost. "We are kind of like the bargain basement of satellite building," jokes Montgomery.
Why did they do it? "You wouldn't put an expensive payload on an inexpensive rocket - it's a risk issue. You'd use an inexpensive bus to fly an inexpensive instrument on an inexpensive rocket," says Montgomery. For example, FASTSAT could be used for test demonstrations of new technologies. "It doesn't make sense to spend several hundred million dollars just to test a technology before a major mission when a FASTSAT can do it for so much less," states Montgomery. "That's the impetus driving this project." FASTSAT is 39.5 inches in diameter - not much larger than the dreaded exercise ball. It is hexagonally shaped and weighs 90 kg without a payload. A payload up to 50 kg can hitch a ride. These dimensions place FASTSAT squarely in the microsatellite category.
What is the significance of FASTSAT?
What is next for FASTSAT? "That's the next step," says Montgomery. "We've proven we can design it, and we've got it built. Someone who can afford the ride and has an instrument they want to fly will come along and find us." Related Links NASA's Future Space Technology News - Applications and Research
Dawn Checkout Going Out Pasadena CA (SPX) Nov 14, 2007 Now more than halfway through its 80-day initial checkout phase, the Dawn spacecraft continues to please its fans in mission control and throughout much of the rest of the universe. The project team has maintained the intensive pace described in the last log, and the sole team member in deep space has performed extremely well. |
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