Earthdata Forum

This is not an issue with the PACE data itself, but seems rather a general issue accessing to OPeNDAP resources from obdaac (perhaps other daacs?). For example, starting from the main page https://oceandata.sci.gsfc.nasa.gov/ when I try to navigate to Opendap, I get a Secure Connection Fail.

When I try to go directly to a granule, say of PACE data (with a URL retrieved from Earthdata/CMR), such as this:

https://oceandata.sci.gsfc.nasa.gov/opendap/PACE_OCI/L3SMI/2024/0401/PACE_OCI.20240401.L3m.DAY.CHL.V3_0.chlor_a.0p1deg.nc.dmr

(note the .dmr at the end so that it should go to the opendap dap4 data request page for that granule rather than trigger a full download)

I also get the same Error...

Should users expect this to be a temporary issue when accessing opendap data?

Thank you very much

If I run:
ncdump -h https://oceandata.sci.gsfc.nasa.gov/opendap/PACE_OCI/L3SMI/2024/0401/PACE_OCI.20240401.L3m.DAY.CHL.V3_0.chlor_a.0p1deg.nc
Note: no .dmr
I get the headers:
netcdf PACE_OCI.20240401.L3m.DAY.CHL.V3_0.chlor_a.0p1deg {
dimensions:
eightbitcolor = 256 ;
lat = 1800 ;
lon = 3600 ;
rgb = 3 ;
variables:
float lat(lat) ;
lat:long_name = "Latitude" ;
lat:units = "degrees_north" ;
lat:standard_name = "latitude" ;
lat:_FillValue = -999.f ;
lat:valid_min = -90.f ;
lat:valid_max = 90.f ;
float lon(lon) ;
lon:long_name = "Longitude" ;
lon:units = "degrees_east" ;
lon:standard_name = "longitude" ;
lon:_FillValue = -999.f ;
lon:valid_min = -180.f ;
lon:valid_max = 180.f ;
byte palette(rgb, eightbitcolor) ;
<truncated>

Try adding .html after .dmr to view it in a browser

https://oceandata.sci.gsfc.nasa.gov/opendap/PACE_OCI/L3SMI/2024/0401/PACE_OCI.20240401.L3m.DAY.CHL.V3_0.chlor_a.0p1deg.nc.dmr.html

Tommy

Yes, this was a temporary issue. The service has been restored.
Regards,
Sean

Thank you for your reply. I finally managed to try to access pace data, but my issues persist. I tried navigating to the OPeNDAP end point form the OB website (I did clear my cookies and tried multiple browsers), I tried pasting the url above (with the .dmr) directly on the browser, and I tried using python's requests session to retrieve the dmr of the remote file above. I still cannot access the data.

Thanks again,

I tried it again, some 30 minutes after my initial attempts this morning, and I can confirm that the access it back up again. Thanks and I will mark this as answered!

Hi,

I am again having issues accessing PACE data via OPeNDAP. Querying the CMR returns all possible PACE OCI data (level 3), but I am again experiencing "Secure Connection Failed" when trying to access the data request form (adding ".dmr" to the opendap url).

For example:

https://oceandata.sci.gsfc.nasa.gov/opendap/PACE_OCI/L3SMI/2025/0701/PACE_OCI.20250701.L3m.DAY.CHL.V3_1.chlor_a.4km.NRT.nc.dmr

When will the service be restored?
Thank you very much!

I am able to load the page. Are you still seeing the problem?
If so please provide your IP address that you are trying to connect from so we can check if it is blocked.

Tommy

Thanks, it is back on. I had trouble all day yesterday, but I am happy to see it is back on today. Thanks!