2.2.2 spase://NASA/NumericalData/Helios1/Ephemeris/PT24H Helios 1 Daily Trajectory Data 2021-03-11T18:39:11Z This data set contains orbital parameters for Helios 1: Helios-Sun distance, heliographic longitude from the ascending node, heliographic latitude, ecliptical longitude from the mean equinox, ecliptical longitude from the Earth-Sun line, ecliptical latitude, Helios - Earth distance, and number of rotations of the Sun referred to Helios since launch. Please acknowledge the National Space Science Data Center(NSSDC). spase://SMWG/Person/Jan.Merka MetadataContact Readme file at SPDF https://spdf.gsfc.nasa.gov/pub/data/helios/helios1/traj/day/helorb.txt spase://VSPO/NumericalData/P_HELIOS1_HDR_EPHEMERIS_24H spase://VSPO/NumericalData/Helios1/Ephemeris/PT24H spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/helios/helios1/traj/day/ Via ftp in ASCII from SPDF HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/helios/helios1/traj/day/ In CDF via HTTP from SPDF Text ASCII spase://SMWG/Instrument/Helios1/Ephemeris Ephemeris 1974-12-10T00:00:00.000Z 1981-09-30T00:00:00.000Z PT24H Heliosphere.Inner