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The system is composed of four commercial high definition video cameras which were built to record video of the Earth from multiple angles by having them mounted on the International Space Station. The cameras streamed live video of Earth to be viewed online and on NASA TV on the show Earth Views. Previously-recorded video now plays in a ...
A star tracker is an optical device that measures the positions of stars using photocells or a camera. [1] As the positions of many stars have been measured by astronomers to a high degree of accuracy, a star tracker on a satellite or spacecraft may be used to determine the orientation (or attitude) of the spacecraft with respect to the stars ...
DGPS Reference Station (choke ring antenna)A reference station calculates differential corrections for its own location and time. Users may be up to 200 nautical miles (370 km) from the station, however, and some of the compensated errors vary with space: specifically, satellite ephemeris errors and those introduced by ionospheric and tropospheric distortions.
Direction determination refers to the ways in which a cardinal direction or compass point can be determined in navigation and wayfinding.The most direct method is using a compass (magnetic compass or gyrocompass), but indirect methods exist, based on the Sun path (unaided or by using a watch or sundial), the stars, and satellite navigation.
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Just like the 150th Kentucky Derby post-position draw, the Oaks draw will take place at the newly renovated paddock in Churchill Downs, a full week ahead of the Kentucky Derby for the first time ...
In modern systems, a profanity delay can be a software module manually operated by a broadcast technician that puts a short delay (usually, 30 seconds) into the broadcast of live content. This gives the broadcaster time to censor the audio (and video) feed. This can be accomplished by cutting directly to a non-delayed feed, essentially jumping ...
For the most accurate reading, the arm should be supported on a desk or surface, with the middle of the cuff aligned with the level of the heart, adds Dr. Del Conde Pozzi.