What are the characteristics of the STEREO spacecraft (size, mass, etc.)?
Key characteristics of the twin STEREO observatories: • Mass: 1,364 pounds (620 kilograms) • Dimensions • 3.75 feet (1.14 meters) high • 4.00 feet (1.22 meters) wide (launch configuration) • 21.24 feet (6.47 meters) wide (solar arrays deployed) • 6.62 feet (2.03 meters) deep • Average power consumption per orbit: 475 watts • Data downlink: 720 kilobits per second • Memory: 1 gigabyte • Attitude: • Control — within 7 arc seconds (0.0019 degrees) • Knowledge — within 0.1 arc second (0.000028 degrees) 1 arc second = 1/3,600 of a degree.
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