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I have resolved my issues with this data. Here is what I found in case others run into the same issue. IGS is adopting a new coordinate frame (IGS20) and file naming scheme as seen in this announcement: ​https://igs.org/news/igs20/. As part of this change they are modifying the file naming scheme us...

The GPS SP3 Ultrarapid and Rapid products that are stored at https://cddis.nasa.gov/archive/gnss/products/ have not been updated since 2022:11:27 21:05:03 UTC. Usually these files are uploaded at a consistent cadence. Does anyone know of when this will be resolved or if this data is now being hosted...

I have also been seeing more 504 gateway errors while attempting to download CYGNSS data. Everything was working over the weekend, but this morning about half of my download requests end in a 504 or returning an HTML page with "You have attempted to access a resource on PO.DAAC Drive that requi...