{"@type": "dcat:Dataset", "accessLevel": "public", "bureauCode": ["026:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "Planetary Data System", "hasEmail": "mailto:pds-operator@jpl.nasa.gov"}, "description": "This data set tabulates local electron densities and local magnetic      field strengths magnetic field strengths obtained from Mars Advanced      Radar for Subsurface and Ionosphere Sounding (MARSIS) Active Ionospheric      Sounding (AIS) mode ionograms.  The electron density is obtained by      measuring the increment in frequency between the plasma frequency      harmonics, visible as bright vertical lines at low frequency and delay      time in many MARSIS ionograms.  Similarly, the local magnetic field      strength is found by measuring the difference in delay time between      electron cyclotron echoes, visible as bright horizontal lines at low      frequency on many ionograms.  Both the measured quantity and the derived      result are included in the archive product.  We also include a data      quality flag giving the impression of the archivist as to how reliable      each result is.  This archive product includes only data from the      nominal mission, which starts about orbit 1850 and ends on orbit 2539.", "identifier": "urn:nasa:pds:context_pds3:data_set:data_set.mex-m-marsis-5-ddr-eledens-bmag-ext4v1.0;urn:nasa:pds:context_pds3:data_set:data_set.mex-m-marsis-5-ddr-eledens-bmag-ext4v1.0::99.0", "keyword": ["__"], "license": "https://www.usa.gov/government-works", "modified": "2026-04-13", "programCode": ["026:000"], "publisher": {"@type": "org:Organization", "name": "planetary plasma interactions"}, "theme": ["Planetary Science"], "title": "MEX: MARSIS ELECTRON PLASMA DENSITY AND                               MAGNETIC FIELD DATA"}