PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "2018-11-30 M.K. Gordon; 20190721 RChen/EN work around catalog ingest. Delete this line next time." RECORD_TYPE = STREAM OBJECT = DATA_SET DATA_SET_ID = "CO-SR-RSS-4/5-OCC-V2.0" OBJECT = DATA_SET_INFORMATION ABSTRACT_DESC = "This data set contains derived radial occultation profiles of the rings of Saturn based on radio occultations made with the Cassini RSS instrument during the Cassini nominal mission." ARCHIVE_STATUS = "ARCHIVED" CITATION_DESC = " Marouf, E., CASSINI ORBITER SATURN RSS RING RADIO OCCULTATIONS 2.0, CO-SR-RSS-4/5-OCC-V2.0, NASA Planetary Data System, 2018. " CONFIDENCE_LEVEL_NOTE = " Confidence Level Overview ========================= Very high. Review ====== This data set has completed a comprehensive PDS Peer Review and all identified liens have been addressed." DATA_OBJECT_TYPE = "SERIES" DATA_SET_COLLECTION_MEMBER_FLG = "N" DATA_SET_NAME = "CASSINI SATURN RSS RING OCC 2005-2010" DATA_SET_RELEASE_DATE = 2019-05-03 DATA_SET_TERSE_DESC = "Cassini RSS derived, radio occultation, radial profiles of the rings of Saturn." DETAILED_CATALOG_FLAG = "N" PRODUCER_FULL_NAME = "MITCHELL K. GORDON" START_TIME = 2005-123T08:00:00 STOP_TIME = 2010-245T21:00:00 DATA_SET_DESC = " Data Set Overview ================= Products include all X-, S-, and Ka-band RSS ring occultations completed before the loss of the Cassini UltraStable Oscillator (USO) in late 2011. The 'TAU' files contain calibrated optical depth and phase shift profiles of Saturn's rings reconstructed from the diffraction-limited measurements. The frequency/phase measurements reference is the Cassini UltraStable Oscillator (USO). The reconstruction is carried out using algorithms described at length in MAROUFETAL1986. Practical implementation steps are provided in an included documentation file, archived_rss_ring_profiles_2018.pdf. Each occultation consists of several companion products . These include one or more reconstructed profiles (TAU) files for the same occultation but at different resolutions, and two which provide geometry and calibration data. The latter two have file names constructed from the same root as this file with the field for radial resolution removed and the 'TAU' replaced by either 'GEO' (geometry) or 'CAL' (carrier frequency and power calibration). For some resolutions, diffraction-limited profiles (DLP) files are also included. In such cases, the DLP file name lists the DLP resolution and 'TAU' is replaced by 'DLP.' Both 1 km (or best achievable resolution per experimental conditions) and 10 km resolution reconstructed profiles (TAU) files are included. We define spatial resolution as the shortest resolvable wavelength in a reconstructed profile. The definition is convenient for characterization of multiple resolution profiles generated from a reference reconstructed profile of resolution much finer than 1 km (when experimental conditions allows). The shortest resolvable wavelength is the inverse of the highest spatial frequency preserved in the data and is determined by the bandwidth of the lowpass filter applied at the end of the data processing chain. The archived 1 km resolution profile is identical to one reconstructed directly from the archived 0.5 km resolution diffraction-limited data processed to achieve 0.75 km 'processing resolution', where the latter is defined by Eq. 19 of MAROUFETAL1986. Processing ========== As discussed in MAROUFETAL1986, actual reconstructed profile resolution can be impacted by several factors including stability of the reference oscillator. The latter is usually characterized by the Allan deviation/variance. Typical values of the Cassini USO Allan deviation is 2E-13 over 1s and 1E-13 over 10-100s. The USO Allan deviation changed little over the USO lifetime. Cassini USO stability does not measurably impact reconstruction resolution down to the meters range. Details of the processing are given in Marouf et al., 1986. Modification History ========== Version 1 - RSS occultations 2005 - 2008. - X Band only - post diffraction correction, radial profiles at 1 and 10 km sampling. Version 2 - includes reprocessed versions of the material contained in the earlier version, plus all subsequent RSS occultations obtained prior to the loss of the Cassini UltraStable Oscillator (USO) in late 2011. - includes 'DLP' files for each observation which contain higher resolution calibrated but diffraction-limited optical depth and phase shift profiles of Saturn's rings, that is, calibrated profiles before reconstruction to remove diffraction effects. - Version 2 contains K, S, and X band data. Contact Information =================== For questions concerning this data set contact: Mitch Gordon PDS Rings Node SETI Institute 189 Bernardo Mountain View, CA 94043 Phone: 276-393-8822 Email: mgordon@seti.org Prof. Essam Marouf, Electrical Engineering Department, San Jose State University, San Jose, CA 95192-0084; Phone: (408) 924-3969; Email: essam.marouf@sjsu.edu. " END_OBJECT = DATA_SET_INFORMATION OBJECT = DATA_SET_MISSION MISSION_NAME = "CASSINI-HUYGENS" END_OBJECT = DATA_SET_MISSION OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = "MAROUFETAL1986" END_OBJECT = DATA_SET_REFERENCE_INFORMATION OBJECT = DATA_SET_TARGET TARGET_NAME = "S RINGS" END_OBJECT = DATA_SET_TARGET OBJECT = DATA_SET_HOST INSTRUMENT_HOST_ID = CO INSTRUMENT_ID = RSS END_OBJECT END_OBJECT = DATA_SET END