Trackers convert dated public orders, service-entry milestones, operational-use signals, deliveries, transfers, and industrial pressure into a reusable monitoring surface. They sit between the static archive and a future deeper data product.
Why This Surface Exists
Trackers show movement over time. They answer when the archive shifts from static capability reference into current demand, delivery, and live-use signal.
Normalization Rule
Where public sources do not cleanly normalize batteries, launchers, or interceptor counts, the tracker keeps the field qualitative instead of forcing fake precision.
Use With
Start with the systems archive for architecture, move to the matrix for comparison, and use trackers when the question becomes which programs are actually moving.