Question T8B10
From subelement T8 - T8B
What is a LEO satellite?
Why is this correct?
LEO stands for Low Earth Orbit. A LEO satellite operates between approximately 100-1,200 miles above Earth's surface with orbital periods of 88-127 minutes. The other options are incorrect: sun synchronous refers to orbital timing relative to the sun, highly elliptical describes orbital shape, and low energy operation mode relates to power consumption, not orbital altitude.
Memory tip
When you see 'LEO' in amateur radio contexts, think 'altitude and accessibility.' LEO satellites are the workhorses of amateur satellite communication because their low altitude makes them reachable with modest equipment, though each pass is brief (5-15 minutes).
Learn more
LEO satellites' low altitude creates both advantages and challenges for amateur operators. Their proximity enables communication with handheld radios and modest antennas, making satellite operation accessible to Technician class licensees. However, their rapid orbital motion causes Doppler shift effects and brief communication windows. Most OSCAR satellites operate in LEO, requiring tracking programs that use Keplerian elements to predict pass times and frequencies.
Think about it
Why do you think amateur satellites favor Low Earth Orbit over higher orbits like geostationary satellites?