Several weeks ago, it became clear that the most important instrument—the Advanced Baseline Imager—had a cooling problem... The infrared wavelengths are currently offline.
Scientists Investigate GOES-17 Advanced Baseline Imager Performance IssueWednesday, May 23, 2018The GOES-R Program is currently addressing a performance issue with the cooling system encountered during commissioning of the GOES-17 Advanced Baseline Imager (ABI) instrument. The cooling system is an integral part of the ABI and did not start up properly during the on-orbit checkout.A team of experts from NOAA, NASA, the ABI contractor team and industry are investigating the issue and pursuing multiple courses of possible corrective actions. The issue affects 13 of the infrared and near-infrared channels on the instrument. At this time, we do not believe that the three channels with the shortest wavelengths, which includes the visible channels, are significantly affected. NOAA’s operational geostationary constellation -- GOES-16, operating as GOES-East, GOES-15, operating as GOES-West and GOES-14, operating as the on-orbit spare -- is healthy and monitoring weather across the nation each day, so there is no immediate impact from this performance issue.If efforts to restore the cooling system are unsuccessful, alternative concepts and modes will be considered to maximize the operational utility of the ABI for NOAA's National Weather Service and other customers. An update will be provided as new information becomes available.
Published on 1 Jun 2018Go behind the scenes at NASA’s Kennedy Space Center and find out what it takes to get a rocket, and its scientific payload, ready to fly.
http://aviationweek.com/awinspace/noaa-narrows-cause-goes-17-cooling-issue?NL=AW-05&Issue=AW-05_20180725_AW-05_453&sfvc4enews=42&cl=article_10_3&utm_rid=CPEN1000001748383&utm_campaign=15742&utm_medium=email&elq2=8239639d573f4e749d8c57ceb863762aThe full details are behind the subscription wall but a note in the visible section reports GOES-R experienced the same issue...
August 01, 2019 RELEASE 19-057GOES-17 Mishap Investigation Board Study Completed [...]The mishap board was tasked with gathering and analyzing information, and identifying the proximate causes, root causes, and contributing factors related to the ABI performance issues. It concluded the most likely cause of the ABI cooling issue is a blockage in the instrument’s loop heat pipes, which transfer heat from the ABI electronics to its radiator. The blockage restricted the flow of coolant in the loop heat pipes, causing the ABI to overheat and reducing the sensitivity of infrared sensors.[...]GOES-17 MIB-determined highest-level Intermediate Cause:ECFT-6: The ABI LHPs had Insufficient Working-Fluid Flow to Carry the Required Heat LoadThis intermediate cause indicates that the movement of the working fluid was inadequate to dissipate the heat load being provided to the LHP.With the limited set of available telemetry data and without the ability to evaluate the in-flight hardware, the R/LHP failure could not conclusively be isolated to a specific part or failure. These circumstances prevented the MIB from developing causal linkages below the intermediate level. However, after reviewing all of the data available, the MIB concludes that the most likely technical explanation for the failure of the GOES-17 LHPs to transport and reject their expected heat load is physical blockage of the LHP assembly by particulates contained in the working fluid.In its causal analysis, the MIB examined objective evidence for causal elements in six categories (quality, requirements, design, testing, contamination, and structures) to assess the impact of each element as a potential contributor to the mishap. The MIB determined the engineering, process,and organizational issues related to those elements and have provided recommendations to address the issues identified."