A programmable radar target simulator provides microwave signals for testing a missile that is otherwise controlled by such signals when it is deployed. The simulator has the capability for initiating suitable microwave signals at the proper power levels in the fully automatic, semi-automatic, or fully manual modes. A control section and an IF section accept digital commands from an external computer or manual control from switches and thumbwheels on the front panel of the simulator to provide for the automatic and manual control signals respectively. A frequency synthesizer section provides three frequency modulated IF signals and one amplitude modulated coding signal which respectively are fed to the IF section and to the control section. Doppler frequency shifts are extracted and representative signals are provided in both AC and DC forms to a microwave section. The microwave section uses the frequency modulated input IF signals and microwave switching commands from the IF section to generate and output proper microwave signals which are used to simulate a target for the missile. A frequency and power metering section assures that the microwave signals emanating from the microwave section are of the proper frequency and power level and a DC power section assures a stabilized source of DC power for all the sections heretofore listed.
A complex radar target emitter having independent control of three radio frequency (RF) radiation field characteristics, the radiation field characteristics being the real and imaginary components of the complex amplitude of the radiation field, the spatial derivative of the real and imaginary components of the complex amplitude in one of two orthogonal planes, and the spatial derivative of the real and imaginary components of the complex amplitude in the other of the two orthogonal planes.
A moving target simulator is provided for testing a wide variety of radars ithout the need for a direct connection between the simulator and the radar under test. The simulator accurately replicates the pulse width and amplitude of transmitted radar signals and provides a delay feature that permits simulated target scenarios to be presented to a radar under test. The simulator incorporates control features that allow Doppler frequency changes to be accounted for and that permit signal level changes to be made as in accordance with inverse 4th law distance-dependent target-return power variation.
A dual port memory waveform generator system uses a clock-based system whose pulse durations and separations were set by counters that use the same fundamental clock frequency of the radar to be simulated. This pulse generator is loaded from a laptop computer. The output pulses are used to control pin switches to switch various frequencies, amplitudes, or phases as required for the particular radar being simulated. The result is a system with very good fidelity that will fit in a suitcase, and is very portable.
A Missile Launch and Flyout Simulator (MLFS) for simulating the UV and IR flight characteristics of an incoming missile throughout its launch, powered flight and post burnout phases, as would be viewed by a missile launch detection and tracking system. The simulator produces a UV output to simulate the launch of a missile, and an IR output to simulate the powered flight and post burnout phases of the missile's flight. In addition, the IR output ramps up in intensity during the simulated powered flight phase before dropping off to a simulated post burnout phase level, as would the IR signature of a real incoming missile. The simulator can also be programmable such that the duration of the emulated powered flight time, as well as the minimum and maximum IR intensity, can be varied to mimic the characteristics of the missile being simulated. In addition, the rate at which the IR intensity increases can be programmed so as to simulate different speeds of missile convergence to its target. The simulator is also portable and capable of being remotely triggered so that it can be used in isolated locations or on moving platforms.
A method and a system for simulating the conditions that are present during an air quality emergency occurring in a nuclear powered electrical generation plant. The system uses an apparatus which includes a continuous air monitor (C.A.M.) alarm simulator and chart recorder simulator. The C.A.M. alarm simulator comprises a beacon, a siren, an acknowledge button, an internal power source and a digital alarm control. The C.A.M. alarm simulator is capable of being programmed to activate at some predetermined time. The chart recorder simulator is comprised of a chart holder with a window formed therein. A chart indicating the simulated level of airborne nuclear radiation contamination is placed inside the chart holder so that it can be viewed though the window. The chart holder is placed in visual proximity to the C.A.M. alarm simulator. Simulating the air quality emergency comprises the following steps: At least one C.A.M. alarm simulator is programmed to activate at a predetermined time; a corresponding chart recorder simulator is completed to indicate a specific air quality emergency; a C.A.M. alarm simulator and chart recorder simulator are placed at each of various locations within the plant; the C.A.M. alarm simulators activate at the predetermined time; the acknowledge button on each of the C.A.M. alarm simulators are engaged to discontinue the siren while not affecting operation of the beacon; and finally the user periodically advances the charts indicating changing air quality conditions over time.
