The script is only successful in finding 2018 granules. It searches for but does not find any VIIRS granules from 2012 - 2017. We can find the 2012 - 2017 granules manually on the earthdata website. We've noticed that on the earthdata website, the "title" in the metadata of the 2018 granules is formatted differently than the 2012 - 2017 granules. Should we be searching for the 2012 - 2017 granules in a different way? Is the title formatting the issue? Any insight is appreciated.
For reference, the following is a url that works and successfully finds a 2018 granule:
Try removing all of the mission and instrument specifiers and simply using the CMR concept id with &echo_collection_id=C1441377506-OB_DAAC
It is odd that when I had specified the provider, instrument, and platform, the script could only find VIIRS 2018 granules even though 2012 - 2018 are in the same collection. I wonder if there is an inconsistency in the metadata?
- User Services
- Posts: 90
- Joined: Fri Apr 23, 2021 9:14 am America/New_York
- Has thanked: 6 times
- Been thanked: 2 times
The metadata ShortName for the PLATFORM has changed over time. Your query specified
platform=Suomi-NPP, which was not how the metadata was defined earlier on. The platform was defined as "NPP".
A query for the platform which included _both_ of these values will return the results over the temporal range. Note, this is subject to any other metadata value changes of which I'm not aware; I simply checked the values of the query parameters included for the sample temporal ranges, there might be other examples of changes of course.
The query should include:
curl -i "https://cmr.earthdata.nasa.gov/search/granules.json?page_size=2000&provider=OB_DAAC&point=-66.8303,43.7478&instrument=VIIRS&short_name=VIIRSN_L2_oc&options%5Bshort_name%5D%5Bpattern%5D=true&temporal=2014-06-23T09:05:06Z,2014-06-23T21:05:06Z&sort_key=short_name&platform\[\]=Suomi-NPP&platform\[\]=NPP"
You can see these values by specifying a response type of umm_json for the granules query, btw.
Alternatively, you can also simply use the known collection concept_id is simpler, as long as you know the id, but this is the reason the original query is not returning all of the expected results.
I hope this answer cleared your initial issue regarding the metadata.