Documents / Official release
This Defense Intelligence Reference Document, DIA-08-1101-001, is dated 15 December 2010. The Defense Intelligence Agency's Defense Warning Office produced it under the Advanced Aerospace Weapons System Applications program. It asks how many unmanned spacecraft one pilot could control in a future deep-space fleet, drawing on air traffic control and multiple unmanned vehicle research. It concludes the limits are about 16 craft for simple tasks, 7 for moderately complex ones and 4 for complex heterogeneous craft. It adds that physiological measures can signal operator overload.
From the source:Release of 2026-09-18 Incident: 12/15/10, Las Vegas, Nevada. Released with redactions. This document is a Defense Intelligence Reference Document (DIRD), a technical reference format used by the Defense Intelligence Agency (DIA) to capture baseline knowledge on a specific topic for later analytic use. DIRDs are best understood as reference and synthesis products rather than as original research. It is one of 38 DIRDs produced under the Advanced Aerospace Weapon System Applications Program (AAWSAP) between 2009 and 2011. Because AAWSAP’s scope permitted a broad range of supporting topics, not every DIRD in the series directly concerns aerospace systems or future threat assessment. The following summary reflects the DIRD’s scope and framing at the time of writing and should not be read as implying current validation of the concepts discussed. This DIRD examines how many unmanned spacecraft a single human operator could realistically supervise or control at once, using research from air traffic control and multi-vehicle remote piloting as rough analogs. The report argues that the practical limit depends heavily on task complexity: about 16 craft for simple monitoring or destination assignment, about 7 for moderately complex piloting or mission tasks, and about 4 for complex heterogeneous operations. It places particular emphasis on the operator’s ability to maintain a coherent mental “big picture” of multiple vehicles at once, and it suggests that automation and external displays can help by offloading working-memory demands, though not eliminating them. The document also highlights physiological workload measures as a possible way to detect or predict operator overload in real time. Overall, it presents multi-spacecraft control as a human-factors and systems-integration problem in which progress depends on managing cognitive limits through interface design, automation, and workload monitoring.
UNCLASSIFIED/ /FOR OFFICIAL tt.!! 8HL>f In an essential foundation study for introducing forms of augmentation to the ATC task, Wickens modeled the dual task environment of pilot traffic avoidance using alarms to augment detection of conflicts. The primary task was maintaining aircraft flightpath using a simulated cockpit display of a crosshair inside a box: the crosshair indicated aircraft direction and drifted toward the sides of the box if not corrected by the pilot using a joystick control. The drift rate was variable and could increase or decrease the difficulty of the primary task. The computer monitored for potential collisions and warned pilots if another aircraft was within 3 miles. Pilots were instructed to maintain their own aircraft flightpath first, and then detect conflicts. Upon alarm, the pilot was to examine an ATC display and recommend re routing of the conflicting aircraft. Pilots were informed that the automated detection system may erroneously label some situations as conflicts; therefore the pilot needed to actually perform several ATC cognitive task functions to confirm the conflict before recommending action. Participants in the study were 12 student pilots. The results of this experiment showed that when augmentation was correct more than about 80% of the time, performance decreased due to decreased vigilance in confirming alarms properly on the ATC display. Additionally, with a high accuracy in the alarm rate, pilots did not regularly check the ATC display to ensure that the augmentation didn't miss possible conflicts. Auditory and visual binary alarms were presented and the auditory alarms were more effective and did not interfere with the primary task (visual tracking). The authors concluded that a 20-25% false alarm rate was optimal" when it is intended for the pilot to work alongside the automation rather than rely on it. 42 The Wickens study was undertaken with the plan of moving ATC to a shared responsibility of the controller and pilot: the goal being to increase airspace capacity by removing some of the more mundane functions like en-route course correction and en route conflict detection to primarily cockpit control. This situation would be analogous to a spacecraft pilot operating their primary vehicle manually while attending many semi automated ancillary vehicles. Although not exactly the same, Landsdown studied TLX workload measures on drivers performing multiple in-vehicle tasks. The authors here concluded that secondary tasks significantly increased perceived workload in this arrangement of task control. 43 n This noise in the signal is analogous to adjusting the squelch level on a CB radio : too high a setting and you miss traffic; too low a setting and all you hear is random noise . UNCLASSIFIED/ /FOR OFFICl\l W&E 8HL'I 17
Not linked to a story yet.
Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 31 pages are in the text index: search them above, or from the library's search.