'unknown target' is a perfectly acceptable phrase in written English.
It is used to refer to an objective, person, or thing that is not yet known or identified. For example, "The police are still searching for the shooter's unknown target."
He died on United Airlines Flight 93, which crashed in Pennsylvania short of its unknown target.
An antiaircraft gun thundered at an unknown target in a nearby school.
Phonologically known target patterns showed greater generalization than unknown target patterns across all phases.
Election polling also brings with it a "day of reckoning" of sorts, when the hitherto, unknown target you've been trying to hit is revealed on election night.
An application of the "Target prediction" component in KampoDB is to predict unknown target proteins of the constituent compounds of natural medicines.
In this paper, we present a probabilistic evolutionary method that optimizes system architectures for the identification of unknown target systems.
The limitation of the traditional guidance law, which simply treats the unknown target acceleration as zero, has been analyzed.
American authorities are also examining Al Qaeda's role in three plots timed to millennium celebrations in 1999 -- attacks directed at another American ship, a so-far unknown target in the United States, and tourist sites and a hotel in Jordan.
In some cases, purification of unknown target molecules is facilitated by the ability to cleave the cross-linking bonds after isolation of the complex.
At the heart of this technique lies the comparison of an unknown target image to a known reference database of images.
Finally, a sparse recovery approach based on lq (0 < q ≤ 1) norm optimization is developed to estimate the unknown target parameters.
