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 OSSICIAl WSE 8HLY and a quantitative scale, allowing it to be used in threshold detection and prediction, as well as in computer-assisted workload balancin g. PERFORMANCE MEASURES Laboratory, reaction time to an event stimulus is a typical real-time measure of speed. Outside the laboratory, in a more natural environment, speed is an indirect measure of a subject's ability to keep up with a given rate of events. a Accuracy is measured in both the laboratory and naturalistic environments: for example, in an air-traffic control task, properly handing off a plane to the next controller, as it leaves the first controller's monitored airspaceb, is measured as a successful task completion. Performance, when utilizing a secondary task, is accompl ished following two paradigms. First, in the dual -task paradigm, performance on the secondary task is required and primary task performance is thus an indication of workload. For the second paradigm, instruction is given to maintain the primary task performance, and performance on the secondary task is thus a measure of "space capacity" for additional workload. Care is required in selection of secondary tasks in order to ensure they affect the resources one wishes to probe. For example, in a driving scenario, a minimally intrusive task is to push a button on the floor or steering wheel when a light flashes in the field-of-view of the driver. This visual "detect-and-respond" task adds to what is primarily a complex visual and motor coordination task that probes the capacity of visual attention. 6 This is different than a seconda ry task utilizing different resources, such as having a conversation while driving. When planning the paradigm, a model needs to be developed that treats (or explicitly ignores) individual tasks and interactions among them. Reference tasks are executed before and after primary tasks. Typically reference tasks focus on trending in performance due to effects such as fatigue. One important case of reference tasks is to normalize an individual's current capacity for mental workload. Such a pre-performance measure can be used to adjust maximum workload to compensate for day-to-day variation. PHYSIOLOGICAL MEASURES The human nervous system is anatomically divided into the Central Nervous System (CNS) - and the Peripheral Nervous System (PNS). The CNS includes the brain and the spinal cord. The PNS is made up of the somatic division, which innervates the skin, voluntary muscle, and joints, and the autonomic division, which mediates visceral sensation as well as executes motor control of smooth muscle, viscera, and endocrine glands. The autonomic division consists of sympathetic, parasympathetic, and enteric systems. The sympathetic system mediates response to stress, wh ile the parasympathetic system works to maintain homeostasis and conserve body resources. • Reaction time is not typically measured in real-time in the field as events occur at unplanned ti mes. Post-hoc analysis can resolve reaction times down to a comparable resolution to innate motor reaction variance, on the order or lO's of msec. b Contrary to what a layperson may think, the vast majority of errors in air traffic control do not result in coll isions or even near misses; rathe r they are mistakes In procedure. UNCLASSIFIED/ /FOR OFFI&I:wk WS&: ONlY 4
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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.