Abstract
A lidar simulator tool was developed to simulate realistic raw signal data generated from a wake vortex velocity field as measured by the existing Lockheed Martin Coherent Technologies (LMCT) pulsed lidar currently being used to in field measurements of aircraft wake vortices. The raw lidar data is processed and the resulting product files are input into the existing LMCT's Wake Vortex Processing Algorithm for determining position and circulation strength versus wake age. Outputs from the Wake Vortex Processing Algorithm are then compared to the truth data used to generate the raw lidar signal data. Accuracy of the lidar measurements of lateral and vertical vortex positions is evaluated by exercising the lidar simulator, using input wake vortex fields based on analytical vortex models and 3-D Large Eddy Simulation numerical model outputs for different aircraft vortex, lidar and environment conditions. This study shows that the mean biases for the lidar measurements for vortex positions are small, about 4-7m for the lateral position and 13m for the vertical positions.
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