| 释义 |
polar orbitnounA satellite orbit that passes over polar regions, especially one whose plane contains the polar axis: an amateur radio satellite in a polar orbit [mass noun]: the agency maintains four satellites, two in polar orbit...- By 2001 those satellites (flying in polar orbits and geosynchronous orbits) were equipped not only with cameras but with a range of sensors that employed the latest infrared technology.
- Depending on your stretch of that definition, a satellite in a perfect polar orbit would pass over each pole once per day and might be called ‘geosynchronous’, but like the time of day at the poles the terminology becomes ambiguous.
- When declared operational in 1964, Transit consisted of five satellites in offset polar orbits circling the Earth at an altitude of about 670 miles.
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