Searching for PDS Data with Legacy Registry

• Using Keyword Search
• Using Web API
• System Quirks

Using Keyword Search

Located at https://pds.nasa.gov/datasearch/keyword-search/, the Keyword Search provides a web access point for browsing through PDS data.

Note: When browsing for data in keyword search, you can always copy over the URL query from to the Web API to access the JSON input. For example:

https://pds.nasa.gov/datasearch/keyword-search/search.jsp?q=target%3Amars&fq=facet_type%3A%221%2Cinvestigation%22&f.facet_type.facet.prefix=2%2Cinvestigation%2C

becomes

https://pds.nasa.gov/services/search/search?wt=json&q=target%3Amars&fq=facet_type%3A%221%2Cinvestigation%22&f.facet_type.facet.prefix=2%2Cinvestigation%2C

Using Web API

Find all targets:

curl --location --request GET https://pds.nasa.gov/services/search/search?wt=json&q=product_class:Product_Context and data_class:Target 

Find all missions / investigations:

curl --location --request GET https://pds.nasa.gov/services/search/search?wt=json&q=product_class:Product_Context and data_class:Investigation

Find all instrument hosts (e.g. spacecraft)

curl --location --request GET https://pds.nasa.gov/services/search/search?wt=json&q=product_class:Product_Context and data_class:Instrument_Host

From this you can then see from an individual product, some of the data associated with a mission, instrument host, instrument, etc.

Find all Collections

curl --location --request GET "https://pds.nasa.gov/services/search/search?wt=json&q=product_class:Product_Collection"

Find all Bundles

curl --location --request GET "https://pds.nasa.gov/services/search/search?wt=json&q=product_class:Product_Bundle"

Find all PDS3 Data Sets

curl --location --request GET "https://pds.nasa.gov/services/search/search?wt=json&q=product_class:Product_Data_Set_PDS3"

Find all "data sets" (e.g. Collections, PDS3 Data Sets)

curl --location --request GET "https://pds.nasa.gov/services/search/search?wt=json&q=product_class:Product_Collection%20or%20product_class:Product_Bundle%20or%20product_class:Product_Data_Set_PDS3"

Simple Product Search

From the OSIRIS-REX mission metadata:

https://pds.nasa.gov/services/search/search?wt=json&identifier=urn:nasa:pds:orex.mission

You can see what instruments belong to it:

instrument_ref: [
"urn:nasa:pds:context:instrument:tagcams.orex::1.0",
"urn:nasa:pds:context:instrument:ocams.orex::1.0",
"urn:nasa:pds:context:instrument:ola.orex::1.0",
"urn:nasa:pds:context:instrument:otes.orex::1.0",
"urn:nasa:pds:context:instrument:rexis.orex::1.0",
"urn:nasa:pds:context:instrument:ovirs.orex::1.0"
],

And the instrument host(s) (spacecraft) for the mission:

instrument_host_ref: [
"urn:nasa:pds:context:instrument_host:spacecraft.orex::1.1"
],

And it's targets:

target_ref: [
"urn:nasa:pds:context:target:asteroid.101955_bennu::1.1"
],

You can then look at the metadata for that instrument host (sometimes where you need to go to track down targets) or instrument or target:

instrument host example: https://pds.nasa.gov/services/search/search?wt=json&identifier=urn:nasa:pds:context:instrument_host:spacecraft.orex
instrument example: https://pds.nasa.gov/services/search/search?wt=json&identifier=urn:nasa:pds:context:instrument:ovirs.orex
target example: https://pds.nasa.gov/services/search/search?wt=json&identifier=urn:nasa:pds:context:target:asteroid.101955_bennu 

Another good example of recently curated data is Cassini:

https://pds.nasa.gov/services/search/search?wt=json&identifier=urn:nasa:pds:context:investigation:mission.cassini-huygens

More Complicated Example (Bad Data)

TBD

System Quirks

The metadata for these context products can vary largely, here are a few tips:

• Sometimes data providers have been inconsistent about what goes in a Mission context product versus an Investigation - If one looks very terse, try the other.

• Missing targets - if something doesn't look like with the context products, you may need to do some more complex queries for all targets identified in the database, e.g. all missions that ever targeted Europa.

  • From other examples above, I know the identifier for Europa target is urn:nasa:pds:context:target:satellite.jupiter.europa
  • Quirk Alert: You can't query by _ref with the LIDs, you have to shorten and use wildcards, e.g. target_ref=*satellite.jupiter.europa*
  • From keyword search: https://pds.nasa.gov/datasearch/keyword-search/search.jsp?q=target_ref%3A*satellite.jupiter.europa*
  • Copied query to web API: https://pds.nasa.gov/services/search/search?wt=json&q=target_ref:*satellite.jupiter.europa*