The SMTI requirement is to track a 10-decibel (DB) target at 2,800km – a truck size vehicle with about a 10m
2 radar cross section.
То есть о пешеходах речь не идет. Launch detection and early trajectory measurement Air Moving Target Indication (AMTI) track capability could be added to Increment 1 with low impact on cost and schedule if included in the initial design. AMTI could provide early warning of launch from known launcher locations and some capability to search a given area on the surface for launches from unknown sites. SBR AMTI would not have a capability to search airspace and must instead either be cued by another system or maintain track from the point of launch.
− Using conservative assumptions, about 10% of a single satellite’s SMTI/AMTI resources are needed for each monitored site.
− Using other assumptions, SBR, using AMTI, could monitor multiple sites and also search a significant area for launches from unknown sites.
− Early launch detection (before cloud break) could cut valuable tens of seconds from the time to cue other missile defense systems.
The AMTI capability could also provide sufficient trajectory information to commit an interceptor for earliest engagement.
− Single satellite access should be capable of providing information on a single digit number of simultaneous launches.
− Earliest commitment is critical to success for boost/ascent phase and some mid-course intercepts.
The potential value of AMTI capability warrants adding it to the SBR program. To be useful for this mission, the constellation must eventually provide near continuous access during times and at places of high interest.
Trajectory Tracking
The baseline SBR is to have an inherent capability to measure velocity and velocity changes of major components of a missile system that are above the horizon with useful precision. Cueing is required for SBR to acquire the missile.
This capability would provide an intercept error basket precise enough to direct the interceptor to its required acquisition and maneuver basket.
The Missile Defense Agency needs to include the trajectory tracking capability of the baseline SBR in plans for the overall sensor architecture for an integrated missile defense.
http://www.acq.osd.mil/dsb/reports/2004-06-spacebasedradar.pdf
