"Micro-satellites are not just for science anymore" states David R Cooper and he should know at least a little bit about the topic given his position as Chief Executive Officer of Microsat Systems Canada Inc. (MSCI), the company acting as the Canadian Space Agency (CSA) prime contractor and systems engineer for the Near Earth Object Surveillance (NEOSSat) micro-satellite.
NEOSSat is expected to launch in 2011 and according to the CSA NEOSSat website:
In addition to searching for asteroids, NEOSSat will also update the positions of satellites and space debris orbiting high above the Earth as part of a project by the Defence Research and Development Canada (DRDC) known as HEOSS (High Earth Orbit Surveillance System). While this has been done from space before, it has never been done using such small spacecraft....All of which makes this particular little micro-satellite quite the useful tool, but other small micro-satellites similar to NEOSSat (which weighs 75-kilograms and uses only 50 watts of solar power) are already proving their worth in many different fields, according to Cooper.
"NEOSSat is a technological pathfinder for us to demonstrate the potential of micro-satellite technologies to satisfy operational requirements of the Canadian Forces," explains Major Tony Morris of the Department of National Defense."
For example, while the enormous Hubble space telescope may have grabbed media attention over the last two decades, the future of astronomy may actually belong to smaller satellites like the Microvariability and Oscillations of Stars (MOST) micro-satellite telescope. According to Wikipedia, MOST is also the smallest space telescope in the world (which is why its creators nicknamed it the “Humble Space Telescope”).
But while the larger Hubble telescope is indeed a magnificent technology, it also cost billions of dollars to build and maintain which is multiple orders of magnitude more than the MOST. On top of which, groupings of micro-satellite telescopes like MOST could also combine their capabilities and signals together into "satellite constellations" with far greater capabilities than could be created within just one satellite or ground based telescope, no matter how large.
So the future may belong to the micro-satellite and this is what MSCI is banking on.
The firm operates the MOST micro-satellite under contract to the CSA and is using the lessons learned from it's design, manufacture and operation to not only improve MOST but to design and build the next generation of micro-satellites, starting with NEOSSat. According to Cooper, there are:
"many useful applications for constellations of micro satellites including planetary imaging and satellite tracking, but also a wide range of operational and commercial applications are possible. That's why we've designed our micro-satellites around a standardized and cost-effective, multi-mission micro-satellite bus (MMMB) architecture."The MMMB features a core mechanical structure approach, adaptable to a wide variety of payloads, and a suite of optional bus components to meet a variety of mission requirements.
In addition to MSCI's core expertise in the area of systems engineering and attitude control systems, the firm has developed expertise in structures and power sub-system and can call on long time strategic partners for thermal, communications, solar arrays, and computers and any other particular application.
MSCI also teams with an appropriate payload expert. "We don’t try to do it all ourselves" states Cooper. Instead:
We focus on those sub-systems where we have world class expertise the, crown jewels of the company and over time focus our R&D efforts to keep us leading edge in these areas. In parallel we work with our external partners in other sub-systems to keep them informed of directions we are going. This approach of standardizing the MMMB architecture, rather than the technology, allows us to use the latest advanced components while minimizing non-recurring engineering cycles.Cooper feels that the benefits of this approach include:
This is the primary difference between a "micro-satellite" systems engineering approach and a traditional "waterfall" space systems engineering approach. The other major difference is the application of commercial electronic parts carefully selected and tested to meet the harsh environment of space. Using commercial parts instead of traditional space parts significantly reduces the cost and schedule impact of building a satellite. New designs can be rapidly prototyped, tested and modified if necessary.
- Increased capability: MSCI’s use of carefully-screened and radiation-tested commercial components allows them to capitalize on the latest available technology to pack more capability into a micro-satellite mass and volume for more on-board processing, bandwidth and memory. As well, data processing that previously required ground station processing, or bigger satellites, can now be done on the micro-satellites themselves. As a result, ground stations no longer need to be as complex or expensive to run which saves on infrastructure costs.
- Flexibility and scalability: The MSCI developed MMMB architecture is designed to partition bus and payload subsystems because key subsystems, such as power, attitude control system and communications are now able to scale up or down to accommodate a wide range of payloads including optical or electronic surveillance, multi-spectral sensing and communications.
- Bigger bang for the budget: With limited budgets everywhere, the MSCI built MMMB flexible architecture is simpler to adapt to new payloads, easier to reconfigure for new capabilities and faster to bring to completion and this mean it's less expensive.
"We're the only one left but this has allowed MSCI to focus on what it does best, which is growing our core micro-satellite business."The MSCI built MOST micro-satellite will reach its seventh birthday on June 30, 2010 and is expected to be still in orbit and going strong which provides solid proof that the MSCI claims are real and not just a good science fiction story.