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Eng ID | Term | Definition |
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4741 | shutter: focal-plane | A SHUTTER located near the FOCAL PLANE; usually consisting of a curtain with a slot which is pulled across the FOCAL PLANE to make the EXP... more |
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4742 | shutter: louver | A SHUTTER consisting of a number of thin metal strips or louvers which operate like a venetian blind to make the EXPOSURE; usually located j... more |
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4743 | side echo(es) | See ECHO(ES): FALSE. |
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4744 | side lap | See OVERLAP. |
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4745 | side-looking airborne radar (SLAR) | A radar system using a stabilized antenna orientated at right angles to the aircraft flight path. |
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4746 | side scan sonar | A form of active sonar in which fixed acoustic beams are directed into the water perpendicularly to the direction of travel to scan the bo... more |
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4747 | side scan sonar mosaic | An assembly of side scan sonar images whose edges have been cut or torn and matched to form a continuous side scan sonar image. |
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4748 | sidereal | (adj.). Of or pertaining to the STARS. |
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4749 | sidereal chronometer | See CHRONOMETER. |
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4750 | sidereal day | See DAY. |
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4751 | sidereal hour angle | See HOUR ANGLE. |
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4752 | sidereal month | See MONTH. |
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4753 | sidereal time | See TIME. |
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4754 | sidereal year | See YEAR. |
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4755 | side shot | A reading or measurement from a survey station to locate a point which is not intended to be used as a base for the extension of the SURVEY.... more |
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4756 | siemens | The unit of conductance in the SI SYSTEM. |
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4757 | sight | OBSERVATION of the ALTITUDE, and sometimes also the AZIMUTH of a CELESTIAL BODY for a LINE OF POSITION, or the DATA obtained by such OBSER... more |
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4758 | sight line | See COLLIMATION: LINE OF. |
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4759 | sight (or sighting) vane | See VANE. |
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4760 | sigma-t | Symbol σ t). A conveniently abbreviated value of the DENSITY of a sea water sample of TEMPERATURE t and SALINITY S: σt = (rho(S,t)-1) * 10... more |