2.3.1 spase://CNES/NumericalData/CDPP-AMDA/Cassini/Ephemeris/cass-sls4-north wl sls4 north Saturnian Longitude System 4 (western), north 2017-10-06T10:23:00 Saturn Northern Longitude System 4 (SLS4) determined from Radio and Plasma Wave Science (RPWS) observations of northern auroral radio emissions by William S. Kurth and co-workers from University of Iowa (http://www-pw.physics.uiowa.edu/~dag/publications/2011_sls4_previi_draft.pdf). Calculated by Joseph Groen tool (University of Iowa). Two longitudes are available sub-spacecraft and sub-solar spase://CNES/Person/Joseph.Groene DataProducer Joseph Groene home page http://www-pw.physics.uiowa.edu/~jbg/cas.html cass-orb-spec PartOf orbit saturn : special spase://SMWG/Repository/CNES/CDPP-AMDA Online Open AMDA amda.cdpp.eu NetCDF University of Iowa spase://CNES/Instrument/CDPP-AMDA/Cassini/Ephemeris Ephemeris 2006-04-05T00:00:00Z 2009-09-17T00:00:00Z PT60S Saturn lon_sls4_north_sc cass_sls4_northsc Northern SLS4 sub-spacecraft Longitude pos.bodyrc.long deg TimeSeries Positional lon_sls4_north_sun cass_sls4_northsolar Northern SLS4 sub-solar Longitude pos.bodyrc.long deg TimeSeries Positional