18.104.22.168 Discrete Polar Receptors.
Discrete polar receptors are defined by use of the DISCPOLR keyword. The syntax and type of this keyword are summarized below:
RE DISCPOLR Srcid Dist Direct (Zelev) (Zflag)
where the Srcid is the alphanumeric source identification for one of the sources defined on the SO pathway which will be used to define the origin for the polar receptor location. The Dist and Direct parameters are the distance in meters and direction in degrees for the discrete receptor location. Degrees are measured clockwise from north. The Zelev parameter is an optional terrain elevation for the receptor for use in elevated terrain modeling. The units of Zelev are in meters, unless specified as feet by the RE ELEVUNIT or keyword. The Zflag parameter is the optional receptor height above ground (meters) for modeling flagpole receptors.
If neither the elevated terrain option (Section 3.2.6) nor the flagpole receptor height option (Section 3.2.7) are used, then the optional parameters are ignored if present. If only the elevated terrain height option is used (no flagpoles), then the third parameter (the field after the Ycoord) is read as the Zelev parameter. If only the flagpole receptor height option is used (no elevated terrain), then the third parameter is read as the Zflag parameter. If both options are used, then the parameters are read in the order indicated for the syntax above. If the optional parameters are left blank, then default values will be used. The default value for Zelev is 0.0, and the default value for Zflag is defined by the CO FLAGPOLE card (see Section 3.2.7). Note: If both the elevated terrain and flagpole receptor height options are used, then fourth parameter will always be used as Zelev, and it is not possible to use a default value for Zelev while entering a specific value for the Zflag parameter.
3.4.4 Specifying Plant Boundary Distances
The ISC models include a special option to simplify the input of discrete receptor locations for plant boundary distances. This option is controlled by the BOUNDARY keyword. The syntax and type of this keyword are summarized below:
RE BOUNDARY Srcid Dist(i),i=1,36
where the Srcid is the alphanumeric source identification for one of the sources defined on the SO pathway for which the boundary distances are to be defined. The location of the source will serve as the origin for 36 discrete polar receptors located at every 10 degrees around the source. The Dist array includes the distances (in meters) for each of the directions, beginning with the 10 degree radial and incrementing every 10 degrees clockwise. While the BOUNDARY keyword generates 36 discrete polar receptors, the results for these receptors are summarized separately from receptors defined by the DISCPOLR keyword in the main output file. The RE BOUNDARY card may be repeated for the source as many times as needed to input the 36 distances.
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castellano: DIS CUS DES RAD english: DIS CUS DES RAD
português: DIS CUS DES RAD italiano: DIS CUS DES RAD
français: DIS CUS DES RAD