Army asks industry for optical tracking to validate GNSS navigation aboard aircraft at test ranges

Army wants time-space-position optical tracking as a time-space-position information truth sensor for testing in GNSS-denied environments.
Jan. 26, 2026
2 min read

Key Highlights

Questions and answers:

  • What is the U.S. Army’s Time-Space-Position Optical Tracking (T-SPOT) project intended to do? To assess the feasibility of an optical tracking “truth sensor” that can precisely determine the 3D position, velocity, and attitude of satellite-guided aircraft and munitions on test ranges, especially in GNSS-denied environments.
  • Why is the Army seeking a non-GNSS-based time-space-position information system for its test ranges? Because weapons increasingly rely on GNSS guidance, potential adversaries are boosting jamming capabilities, so the Army needs a precise non-GNSS-based system to test GNSS navigation under realistic jamming and in environments where GNSS signals are unavailable or unreliable.
  • What kind of industry response is the Army requesting for the T-SPOT effort? The Army is asking interested companies to submit 10-page capability statements describing how they could develop a non-GNSS optical tracking architecture that meets T-SPOT performance goals, with responses due by 20 Feb. 2026.

ORLANDO, Fla. – U.S. Army researchers are surveying industry for companies to determine the feasibility of time-space-position optical tracking to help validate the position, velocity, roll, pitch, yaw, and acceleration of satellite-guided aircraft and munitions on test ranges.

Officials of the Army Contracting Command in Orlando, Fla., issued a source-sought notice (W900KK-26-9-XX01) last Wednesday for the Time-Space-Position Optical Tracking (T-SPOT) project.

Army researchers want to use time-space-position optical tracking as a time-space-position information truth sensor for testing in Global Navigation Satellite System (GNSS)-denied environments. The Army Contracting Command is issuing this notice on behalf of the Army's Test Resource Management Center (TRMC), Test and Evaluation/Science and Technology (T&E/S&T) program.

Integrating GNSS navigation systems in weapons is encouraging potential enemies to increase their electronic jamming capabilities to disrupt this kind of satellite guidance. As a result, the Army is trying to test GNSS-based navigation systems in realistic jamming conditions.

Testing approaches

There are two ways to conduct non-GNSS-based testing: live, and in anechoic chambers. Time-space-position information truth sources for live non-GNSS-based testing are moderate at best. Anechoic chambers, on the other hand, can provide high-quality time-space-position information, but the chamber itself limits systems under test.

Instead, the Army needs a precise non-GNSS-based time-space-position information system that can deploy over large test ranges. The intent is not to deliver the fieldable system, but rather to answer whether and how such a system would achieve its performance goals.

A future T-SPOT system must provide precise 3D time-space-position information for systems under test by estimating position based on a comparison of known location of test range landmarks with the time-stamped imagery of landmarks within the field-of view (FOV) of one or more visual sensors.

A future T-SPOT system should achieve a continuous 3D position accuracy comparable to that of real-time kinematic positioning GNSS navigation systems, and should be suitable for airborne systems. The system should minimize its size, weight, and power (SWaP) budget for crewed aircraft, and be applicable to small uncrewed aircraft.

How top respond

Companies interested should email 10-page capability statements no later than 20 Feb. 2026 to the Army's John Mosby at [email protected], with a copy to Peter Jorg at [email protected].

Email questions or concerns to John Mosby at [email protected], or Peter Jorg at [email protected]. More information is online at https://sam.gov/workspace/contract/opp/ee03f399b02945ecbc948c43cd1a4637/view.

About the Author

John Keller

Editor-in-Chief

John Keller is the Editor-in-Chief, Military & Aerospace Electronics Magazine--provides extensive coverage and analysis of enabling electronics and optoelectronic technologies in military, space and commercial aviation applications. John has been a member of the Military & Aerospace Electronics staff since 1989 and chief editor since 1995.

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