Concept
Platform zenith angle
| URI | http://vocab.nerc.ac.uk/standard_name/platform_zenith_angle/ | ||
|---|---|---|---|
| Within Vocab | Climate and Forecast Standard Names | ||
| Definition | Platform zenith angle is the the angle between the line of sight to the platform and the local zenith at the observation target. This angle is measured starting from directly overhead and its range is from zero (directly overhead the observation target) to 180 degrees (directly below the observation target). Local zenith is a line perpendicular to the Earth's surface at a given location. "Observation target" means a location on the Earth defined by the sensor performing the observations. A standard name also exists for sensor_zenith_angle. For some viewing geometries the sensor and the platform cannot be assumed to be close enough to neglect the difference in calculated zenith angle. A "platform" is a structure or vehicle that serves as a base for mounting sensors. Platforms include, but are not limited to, satellites, aeroplanes, ships, buoys, instruments, ground stations, and masts. | ||
| Date | None | ||
| Note | accepted | ||
| modified | 2018-10-15 12:56:49.0 | ||
| Broad Match | P02:HEAD |
Platform or instrument orientation | |
| Exact Match | http://mmisw.org/ont/cf/parameter/platform_zenith_angle | ||
| http://vocab.nerc.ac.uk/standard_name/platform_zenith_angle/ | |||
P07:BBAH2117 |
platform_zenith_angle | ||
| Related | P06:UAAA |
Degrees | |
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