Earthdata Forum

Hi,

How do I find out CMR concept ids that contain L3 mapped 4km oceandata files found at https://oceandata.sci.gsfc.nasa.gov/directdataaccess/Level-3%20Mapped/Terra-MODIS/2022/013/?

Eg, for Terra CHL the above directory has TERRA_MODIS.20220113.L3m.DAY.CHL.chlor_a.4km.nc

But the only concept id I can find is C2331487344-OB_DAAC, and CMR search results for this concept (https://cmr.earthdata.nasa.gov/search/granules.json?online_only=true&collection_concept_id[]=C2331487344-OB_DAAC&page_size=100&temporal[]=2022-06-26T00:00:00/2022-06-27T00:00:00&page_num=1) only contain 4km files spanning a whole month (TERRA_MODIS.20000621_20220920.L3m.SCSU.CHL.chlor_a.4km.nc)

Thanks,
Simon

Hello,

You can try this:
https://cmr.earthdata.nasa.gov/search/collections.json?data_center=OB.DAAC&platform[]=terra&processing_level_id=3&short_name[]=*L3m*&options[short_name][pattern]=true&page_size=100&temporal[]=2022-06-26T00:00:00/2022-06-27T00:00:00&page_num=1

Thank you! This seems like the right dataset, but I'm confused about the lack of CMR ID. I thought all NASA datasets have a CMR ID - is this not the case here?

We have a generic system for getting NASA datasets, so if there is no CMR id, we'd need to extend it to run these custom queries.

Thanks,
Simon

Yes, they all get a CMR ID, however, that is not known in advance since they are not assigned by the data provider (OB.DAAC in this case), so finding the datasets should probably be done using known factors of the dataset. If the CMR ID matters to you, you can always extract it after you get the datasets back that you wanted.

Right, but how would I go about finding the CMR id in this specific case? I normally search https://cmr.earthdata.nasa.gov/opensearch/collections, but it returns nothing relevant.

Right, but how would I go about finding the CMR id in this specific case? I normally search https://cmr.earthdata.nasa.gov/opensearch/collections, but it returns nothing relevant.

In the search above, the returned results shows the concept-id in the 'id' field.

Ah, I see. But this is the same as searching using https://cmr.earthdata.nasa.gov/opensearch/collections, right?

If I any of these IDs in a granule search, I still get filenames with two dates (R2019.0_MODIST_L3m_SST_NRT_TERRA_MODIS.20220624_20220626.L3m.R3QL.SST.sst.4km.NRT.nc) etc. How can I find the concept id for files in https://oceandata.sci.gsfc.nasa.gov/directdataaccess/Level-3%20Mapped/Terra-MODIS/2022/013 ?

Thanks,
Simon