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//EOR QfiFIQl.lik 1!181! er•t I In a post-hoc examination of sources of human error in taped controller data, Chang developed a conceptual model of ATC task within a system of human, software, hardware, and environment using the SHEL23 approach of ergonomics. This study also examined several aspects of personnel management, but when overload was exam ined as the source of error, it was shown that all factors need to be considered along with their interaction. That is, the human and the external task cannot be considered in isolation of the environment of the other humans, and the augmentation capabilities of software, hardware, and the performance environment significantly affect error rates. 24 Operator overload can result in subsequent errors if sufficient recovery time is not allotted. Di Nocera examined specific error rates after short periods of overload. The first part of the study successfu lly proved that these so-called post-completion errors existed in times immediately after peaks in workload. The second part of the study examined whether an augmentation tool to assist in medium term confl ict detection could reduce these errors. The subject population included 18 military ATC of varying experience. Workload was based on self-reported NASA-TLX. Results showed that augmentation processes helped junior controllers, but senior controllers were unaffected by the assistance. 25 UNCLASSIFIED/ j POI\ OP"flCIJltt 1:181!! 8Hk\S 9
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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.