![]() ![]() STK uses 1D linear interpolation to interpolate the data in between the gain samples. By default, gain values are interpolated in dB scale. Gain values may be interpolated in linear scale. By default, the gain values are expected in dBs. The “beam” gain values may be specified in linear scale. ![]() After this keyword, all angle data is expected in degrees or radians, and changed to radians for internal use. This keyword is required and must be the first line in the file.ĭegrees or Radians. Indicates the data format and version of the data format. For non-overlapping beams, the max beam elevation angle should be slightly less (on the order of 1.0e-6 deg) than the low angle of the next higher beam.Īntenna keywords apply to all the beams in the file.īeam keywords apply to individual beams. In areas where beam patterns overlap, gain is additive. The Elevation Azimuth Cuts data file format supports multi-beam data input. Please note that elevation cuts are required while the azimuth cuts are desired and may be substituted internally by STK. It is required that both elevation and azimuth profile data be measured at the beam’s maximum gain point. In the case where only an elevation profile cut is available, STK will substitute an analytical gain profile in the azimuth direction. When the data is available for a full circle cut (e.g., 0 to 360 degrees, or -180 degrees to +180 degrees) you must provide both end points (i.e., 0 and 360 points, or -180 and +180 points) for proper interpolation of the data. For example, the azimuth is -90 degrees to +90 degrees and/or the elevation is -10 degrees to +40 degrees. If the elevation or the azimuth data is restricted to the front hemisphere of the gain pattern, it is required that the gain cut data be specified from -x1 to +x2 degrees across the boresight. ![]() It does not have to be the maximum gain value of the gain pattern. ![]() Point (Elevation =0, Azimuth = 0) in the data file is taken as the antenna's mechanical boresight value. STK will attempt to create a 3D pattern by combining the profiles and interpolating the data.Īzimuth is measured off the antenna boresight (z-axis) in the y,z-plane, and elevation is measured off the antenna boresight in the z,x-plane. The Elevation Azimuth Cuts Antenna file contains an elevation profile cut and, optionally, an azimuth profile cut, from a gain pattern. External Antenna Models Elevation Azimuth Cuts Antenna File ![]()
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