On January 15, NASA’s James Webb Space Telescope’s Near Infrared Imager and Slitless Spectrograph (NIRISS) experienced a communications delay within the science instrument, causing its flight software to time out. Following a full investigation by NASA and Canadian Space Agency (CSA) teams, the caus
In addition to looking at distant stars, galaxies and exoplanets, the NASA/ESA/CSA James Webb Space Telescope will investigate our Solar System. Credit: Northrup Grumman’s Near Infrared Imager and Slitless Spectrograph experienced a communications delay within the science instrument, causing its flight software to time out.
After completing the reboot, NIRISS telemetry data demonstrated normal timing, and to fully confirm, the team scheduled a test observation. On January 28, the Webb team sent commands to the instrument to perform the observation, and the results confirmed on January 30 NIRISS is back to full scientific operations.
The Near-Infrared Imager and Slitless Spectrograph is one of Webb’s four scientific instruments. NIRISS provides near-infrared imaging and spectroscopic capabilities. As the only instrument capable of aperture mask interferometry, NIRISS has the unique ability to capture images of bright objects at a resolution greater than the other imagers. NIRISS is a contribution of the Canadian Space Agency.
“NASA and CSA partnered to approach the problem as technically possible, using a detailed consideration of all areas of operation of the instrument. They analyzed all possible methods to safely recover the electronics. When performing the operation, reviews were held at each intermediate step.
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