Sadie and I observed that CDAWeb isn't able to serve RBSP Density. I'm sure it was able to do this in the past.
This shows the bug, but I found it by searching for the product in the GUI:
vap+cdaweb:ds=RBSP-A_DENSITY_EMFISIS-L4&filter=density&id=y&timerange=2019-01-01
The problem was a question mark appears in the regular expression found in the all.xml file. I look for this now and replace it with "." (any character). Note this has always been an unfortunate bug, where . is actually any character, not a period. This is a bug in das2 and I've always been afraid to fix it, because it will surely break things.
Last edit: Jeremy Faden 2021-09-03