urn:nasa:pds:context:telescope:apache_point.sdss2m5 0.0 1.7.0.0 Product_Context 2016-03-03 1.0 Initial version exported from OLAF urn:nasa:pds:context:facility:observatory.apache_point telescope_to_facility Apache Point Observatory (OLAF observatory code 413) 2.5 254.183334 32.783333 2800 Unknown The 2.5-m SDSS Ritchey-Chretien altazimuth reflector is a 2.5 m telescope located at 32.783333, 254.183334 at the Apache Point Observatory. Operational 05/1998+