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SECOND. A measure equal to one sixtieth part of a minute. Vide Measure. |
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These include pointing at 80 to 250 celestial targets with an accuracy of 5 to 10 arc seconds. We drew on our experience integrating more than 550 payloads to achieve alignments on the spacecraft platform within arc seconds (one arc second equals 1/3,600 degree). 2 arc seconds apart, registers in radio wavelengths, while both can be seen in the visible range. |
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