Modification of the Entity State PDU for Use in the End-to-End Test

摘要

The End-To-End Test (ETE) is being conducted under the auspices of the Department of Defense Joint Advanced Distributed Simulation (JADS) Joint Test and Evaluation (JT&E). The purpose of the ETE is to investigate the utility of using advanced distributed simulation (ADS) to augment both developmental and operational testing of the Joint STARS surveillance system. The basic concept behind the ETE is to augment the Joint STARS environment with a virtual environment created by thousands of simulated entities, or targets. This virtual environment is imaged by simulations of the radar systems contained within the Joint STARS E-8C aircraft and mixed with real radar returns to provide a robust operational environment for testing of the system. The ETE Joint STARS simulation is called the Virtual Surveillance Target Attack Radar System (VSTARS). Simulated entities are transmitted to VSTARS through the use of Entity State Protocol Data Units (ESPDU). The simulation, or simulations, representing these entities transmit ESPDUs representing the status of each entity. This status is used to update data bases that are used to generate Joint STARS virtual radar images. Two modifications have been made to the ESPDU for use in the ETE. The first of these is a modification of the time field and is not mandatory, but is recommended. It records the time the ESPDU was created since the start of the simulation scenario. The second change to the ESPDU is performed internal to the Joint STARS simulation and is much more drastic.