Multifunction Radar Search/Track Constraints | Multifunction Radar Search/Track Constraints with Jamming

Multifunction Radar Search/Track Constraints

A multifunction radar models a collection of radar beams. The beams work together at the same location. Access constraints for multifunction radars model this behavior. At any given time, each beam is able to compute a chosen radar Search/Track metric value (i.e., Single Pulse SNR, Integrated P Det, DwellTime, etc.). The multifunction radar system aggregates the individual beam values at a given time. The system assigns its value at the given time using two methods.

Maximum Across Beams. The maximum value of all values computed for the multifunction radar’s beams. Only active beams that are available at the given time are considered.
Minimum Across Beams. The minimum value of all values computed for the multifunction radar’s beams. Only active beams that are available at the given time are considered.

Multifunction radars provide both Maximum Across Beams and Minimum Across Beams for several Search/Track metrics. They are set as Min/Max constraints. See Multifunction Search/Track Constraints for more information.

Usage Examples

Using a Min value for Maximum Integrated P Det Across Beams

When you specify a Min value for the Maximum Across Beams option, STK models this situation:

At least one beam’s value is greater than or equal to the specified Min value.

This situation models the ability of the multifunction radar to detect the target. At least one of the beam’s integrated probability of detection values is high enough to be detected. The Min value represents the high value.

Using a Max value for Maximum Integrated P Det Across Beams

When you specify a Max value for the Maximum Across Beams option, STK models this situation:

Each beam’s value is less than or equal to the specified Max value.

This situation models the ability of the target to avoid detection by the multifunction radar. Each beam’s integrated probability of detection value is too low to be detected. The Max value represents the value needed for detection.

Using a Min value for Minimum J/S Across Beams

When you specify a Min value for the Minimum Across Beams option, STK models this situation:

Each beam’s value is greater than or equal to the specified Min value.

This situation models the complete jamming of the multifunction radar. Each beam’s J/S value is high enough to show a jammed beam. The Min value represents this high value.

Using a Max value for Minimum J/S Across Beams

When you specify a Max value for the Minimum Across Beams option, STK models this situation:

At least one beam’s value is less than or equal to the specified Max value.

This situation models when at least one of the multifunction radar’s beam is not jammed because that beam’s J/S value is low. The Max value represents this low value.

Multifunction Radar Search/Track Constraints

Search/Track Metric	Aggregation Method	Description
Single Pulse SNR	Maximum Across Beams	Computes the maximum single pulse signal-to-noise ratio across all active available beams.
Single Pulse SNR	Minimum Across Beams	Computes the minimum single pulse signal-to-noise ratio across all active available beams.
Integrated SNR	Maximum Across Beams	Computes the maximum integrated signal-to-noise ratio across all active available beams.
Integrated SNR	Minimum Across Beams	Computes the minimum integrated signal-to-noise ratio across all active available beams.
Single Pulse P Det	Maximum Across Beams	Computes the maximum single pulse probability of detection across all active available beams.
Single Pulse P Det	Minimum Across Beams	Computes the minimum single pulse probability of detection across all active available beams.
Integrated P Det	Maximum Across Beams	Computes the maximum integrated probability of detection across all active available beams.
Integrated P Det	Minimum Across Beams	Computes the minimum integrated probability of detection across all active available beams.
Dwell Time	Maximum Across Beams	Computes the maximum dwell time (i.e., the sum of the integration time and RF propagation delays) across all active available beams.
Dwell Time	Minimum Across Beams	Computes the minimum dwell time (i.e., the sum of the integration time and RF propagation delays) across all active available beams.

Multifunction Radar Search/Track Constraints with Jamming

Multifunction radars support constraints that model jamming of the main channel of the radar receiver. The search/track parameters take polarization mismatch into account if:

radar receiver polarization is set
the jammers are polarized

For more information about jamming and constraints, see Constraints with Jamming.

Search/Track Metric	Aggregation Method	Description
Single Pulse S/(N+J)	Maximum Across Beams	Computes the maximum single pulse signal-to-noise ratio with jamming across all active available beams.
Single Pulse S/(N+J)	Minimum Across Beams	Computes the minimum single pulse signal-to-noise ratio with jamming across all active available beams.
Integrated S/(N+J)	Maximum Across Beams	Computes the maximum integrated signal-to-noise ratio with jamming across all active available beams.
Integrated S/(N+J)	Minimum Across Beams	Computes the minimum integrated signal-to-noise ratio with jamming across all active available beams.
J/S	Maximum Across Beams	Computes the maximum jammer-to-signal ratio across all active available beams
J/S	Minimum Across Beams	Computes the minimum jammer-to-signal ratio across all active available beams
Integrated J/S	Maximum Across Beams	Computes the maximum integrated jammer-to-signal ratio across all active available beams.
Integrated J/S	Minimum Across Beams	Computes the minimum integrated jammer-to-signal ratio across all active available beams.
Single Pulse P Det w/Jamming	Maximum Across Beams	Computes the maximum single pulse probability of detection with jamming across all active available beams.
Single Pulse P Det w/Jamming	Minimum Across Beams	Computes the minimum single pulse probability of detection with jamming across all active available beams.
Integrated P Det w/Jamming	Maximum Across Beams	Computes the maximum integrated probability of detection with jamming across all active available beams.
Integrated P Det w/Jamming	Minimum Across Beams	Computes the minimum integrated probability of detection with jamming across all active available beams.
Dwell Time w/Jamming	Maximum Across Beams	Computes the maximum dwell time with jamming (i.e., the sum of the integration time and RF propagation delays) across all active available beams.
Dwell Time w/Jamming	Minimum Across Beams	Computes the minimum dwell time with jamming (i.e., the sum of the integration time and RF propagation delays) across all active available beams.