Hubble Status Update: June 25, 2021 — End Of Day, Friday — Not Looking Too Promising.

It is rather disconcerting that many differing combinations of components are still all throwing the same errors.

If it is a power regulator (voltage) level issue (see below, bolded bit), there may not be a lot that can be done remotely. We will hope that that is not the case.

In any event, here’s the end of day Friday report from NASA’s Goddard Space Center:

. . .Additional tests performed on June 23 and 24 included turning on the backup computer for the first time in space. The tests showed that numerous combinations of these hardware pieces from both the primary and backup payload computer all experienced the same error — commands to write into or read from memory were not successful.

Since it is highly unlikely that all individual hardware elements have a problem, the team is now looking at other hardware as the possible culprit, including the Command Unit/Science Data Formatter (CU/SDF), another module on the SI C&DH. The CU formats and sends commands and data to specific destinations, including the science instruments. The SDF formats the science data from the science instruments for transmission to the ground.

The team is also looking at the power regulator to see if possibly the voltages being supplied to hardware are not what they should be. A power regulator ensures a steady constant voltage supply. If the voltage is out of limits, it could cause the problems observed. Over the next week, the team will continue to assess hardware on the SI C&DH unit to identify if something else may be causing the problem. If the team determines the CU/SDF or the power regulator is the likely cause, they will recommend switching to the backup CU/SDF module and the backup power regulator. . . .

We are hoping for an “engineering genius” event here — the problem seems pretty fundamental. So do stay tuned. . . smile.

नमस्ते

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