Jammers

STK Radar enables you to identify jammers and assess their impact on the performance of your radar system.

Use the Jamming tab on the Radar's Basic Definition page to enable jamming computations, and assign and de-assign jammers in your jamming analysis. Any monostatic radar can function as a jammer. In addition, if you are licensed for STK Communications, you can assign any transmitter as a jammer. Only qualified assets will appear in the Available Objects area. If your scenario contains bistatic radars or retransmitters, you will not see them here.

In addition, you can set SAR or Search Track constraints for a jammer, and include the effects of jamming in Coverage and Attitude Coverage analyses.

Compute Jamming

Select or clear Use to enable or disable the computation of jamming effects. This allows you to turn off jamming analysis temporarily without having to dismantle your jamming setup; i.e., it is not necessary to de-assign jammers, turn off constraints, etc. Disabling jamming computation will save you processing time if you want to make and test other changes in the scenario without having to recompute jamming each time. This can be especially advantageous in a scenario that includes many jammers.

You must enable jamming computations to have the effect of the assigned jammers taken into account.

Assigning Jammers

To assign an asset as a jammer, double-click it, or select it and click the right arrow button, to copy it to the Assigned Objects area. To de-assign it, double-click it, or select it and click the left arrow button, to remove it from the Assigned Objects area.

Use the Selection filter to assign multiple objects by class. To select all objects of a given class (Radar or Transmitter), select the checkbox for that class. To assign all the selected objects as jammers, click the right arrow button. If appropriate, you can then de-assign selected objects using the procedure described above.

You can also use multiselect techniques to manage large lists of Available and/or Assigned Objects.

Radar jamming objects (jammers) cannot reside on the Radar's parent object in the STK object browser. Therefore,

Do not copy and paste a Radar to an STK object that already has a jamming object for that radar.
Do not copy and paste jamming objects to the parent of a Radar, which is holding the jamming object in its Jammer list.
Do not use Connect to add a jamming object to the Radar's parent object.

A tutorial on jamming analysis accompanies this Help system.

SAR or Search Track Constraints

If you need a constraint on your radar system with respect to system parameters infracted by jamming, then set Search/Track constraints and SAR constraints that take jamming into account.

Effects of Jamming on Coverage and Attitude Coverage

The effects of jamming can be included in Coverage and Attitude Coverage analyses. You can select a radar object as the associated class in defining the basic grid for the Coverage Definition or Attitude Coverage. If you then select Access Constraint as the Figure of Merit Definition, the available constraints for the radar, including those that take jamming into account, will appear in the Constraints list.