Testing WiFi Signals, Radiator System, GO for Outbound Powered Flyby NASA’s Artemis I Mission Management Team polled “go” on Saturday, November 19 for Orion’s outbound powered flyby past the Moon. Starting at 7:15 a.m. EST (4:15 a.m. PST) on Monday, November 21, NASA will cover the flyby live on NA
. The burn is planned for 7:44 a.m. As the Orion capsule passes behind the Moon from 7:25 a.m. through 7:59 a.m., it will lose communication with Earth. It will make its closest approach of approximately 80 miles from the surface at 7:57 a.m.
During flight day four, each solar array was moved to different positions by flight controllers to test the strength of the WiFi signal with the arrays in different configurations. The WiFi transfer rate between the camera on the tip of the solar array panels and the camera controller was tested by the Integrated Communications Officer, or INCO. The goal was to determine the best position for the most efficient transfer of imagery files.
The Emergency, Environmental, and Consumables Manager, or EECOM, tested Orion’s radiator system. Two radiator loops on the spacecraft’s European Service Module help expel excess heat generated by different systems throughout the flight. Flight controllers are testing sensors that maintain the coolant flow in the radiator loops, switching between different modes of operation and monitoring performance. During speed mode, the coolant pumps operate at a constant rate.
Star trackers are sensitive cameras that take pictures of the star field around Orion. By comparing the pictures to its built-in map of stars, the star tracker can determine which way Orion is oriented. The star trackers on Orion are located on the European Service Module on either side of the optical navigation camera. This November 2019 photo was taken as the Orion crew and service module stack for Artemis I was lifted out of the Final Assembly and Test cell.
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