Command and Telemetry Latency Effects on Operator Performance during International Space Station Robotic Operations
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International Space Station operations require onboard crewmembers to perform numerous robotic assembly, maintenance, and inspection activities. Ground-based control of the Mobile Servicing System (MSS), in particular the Special Purpose Dexterous Manipulator (SPDM), has been identified as one potential solution to alleviate disproportionate robotic maintenance and inspection timelines that potentially exceed crew availability and duty times. Challenges to operator performance and safety of ground-based control of these manipulators include significant data and telemetry latency. Recent trends of transmissions between the International Space Station and NASA's Mission Control Center have determined the round-trip time delay can range from 6-8 seconds. The purpose of this study was to examine operator performance when subjects performed representative dexterous robotic tasks with anticipated command and telemetry time delays. Results from this study may determine whether augmentations to existing operator tools and procedures are required in order to manually control the SPDM from ground-based workstations.
