The proxy server received an invalid
response from an upstream server.
The proxy server could not handle the request GET /dataset/dataset/activity/ship-sensor-observations-for-estuary-to-the-abyss-2004-exploring-along-the-latitude-31-30-trans.
Reason: DNS lookup failure for: os-data-catalog.ngdc.noaa.gov
Additionally, a 502 Bad Gateway error was encountered while trying to use an ErrorDocument to handle the request.