sensor_los
- property Workspace.sensor_los
The sensor line-of-sight (LOS) for each measurement block.
Line-of-sights are specified by giving the zenith and azimuth angles. Column 1 holds the zenith angle. This angle is simply the angle between the zenith and LOS directions. For 1D and 3D the valid range is [0 180], while for 2D angles down to -180 degrees are allowed. Negative angles signifies for 2D observations towards lower latitudes, while positive angles means observations towards higher latitudes. Nadir corresponds throughout to 180 degrees.
The azimuth angle is given with respect to the meridian plane. That is, the plane going through the north and south poles. The valid range is [-180,180] where angles are counted clockwise; 0 means that the viewing or propagation direction is north-wise and +90 means that the direction of concern goes eastward.
No azimuth angle shall be specified for 1D and 2D. This angle is in general of no concern for these atmospheric dimensionalities, but matter in some cases, such as with respect to the Doppler shift due to winds. For 1D the azimuth angle is then assumed to be 0 deg, i.e. the sensor is treated to be directed towards North. For 2D, the implied azimuth is 0 or 180, depending of the zenith angle is positive or negative.
See further the ARTS user guide (AUG). Use the index to find where this variable is discussed. The variable is listed as a subentry to “workspace variables”.
Usage: Set by the user.
Unit: [ degrees, degrees ]
Size: [ number of measurement blocks, 1 or 2 ]
Workspace methods that can generate sensor_los
Workspace methods that require sensor_los
Workspace agendas that require sensor_los
Generic workspace methods that can generate or use sensor_los
- type:
WorkspaceVariable- holds typeMatrix