Missing 8-day mean PAR step, Aqua MODIS (7-14 April 2022)

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e.lovecchio
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Missing 8-day mean PAR step, Aqua MODIS (7-14 April 2022)

by e.lovecchio » Wed Dec 03, 2025 8:27 am America/New_York

Hello, 
I'm having an issue with a PAR 8-day mean that isn't being extracted, is there a reason why this time step of the 8day mean PAR isn't available? I downloaded several years of data and this one time step was missing. Then I downloaded again only April 2022 and this was again missing.

Thank you for your help.
Best regards,
Elisa
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dschuck
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Re: Missing 8-day mean PAR step, Aqua MODIS (7-14 April 2022)

by dschuck » Wed Dec 03, 2025 9:20 am America/New_York

There is an ongoing, recurring CMR issue that is being worked on, so many users are encountering "missing" metadata. There have been multiple forum posts for various collections, but here is the most recent one with a reply regarding the in-progress CMR work: viewtopic.php?f=7&t=7396

dschuck
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Re: Missing 8-day mean PAR step, Aqua MODIS (7-14 April 2022)

by dschuck » Wed Dec 03, 2025 9:24 am America/New_York

In addition, when encountering an issue, I recommend first checking the Earthdata Status page before posting a forum question. See https://status.earthdata.nasa.gov/

If that page shows the current status of Common Metadata Repository (PROD) as anything other than green (Ok), then that's very likely the problem, and posting a forum question would likely result in an answer that indicates that there is an issue with the CMR.

If the status is Ok and you're still encountering a problem, then posting a forum question would likely be prudent.

OB ODPS - towens
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Re: Missing 8-day mean PAR step, Aqua MODIS (7-14 April 2022)

by OB ODPS - towens » Wed Dec 03, 2025 10:22 am America/New_York

The Aqua spacecraft experienced an anomaly and entered Earth-point Safe Mode on March 31, 2022 at 17:59:08Z. As a result, no valid MODIS science data were produced after that time. Aqua MODIS returned to science mode on April 15, 2022. While there may have been a partial file produced for the earlier period, it does not contain valid observations, and as such, no extraction was possible.

Tommy

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