urn:nasa:pds:context:instrument:rss.co 2.0 1.13.0.0 Product_Context 2021-02-15 2.0 Updated for Cassini Orbiter raw radio science data migration to PDS4. Separated ground elements into a separate set of context products; this context product describes only the spacecraft instrumentation. Corrected instrument type to be 'Radio Science'. Reformatted for easier reading. 2016-10-01 1.0 Extracted metadata from PDS3 catalog and modified to comply with PDS4 Information Model. urn:nasa:pds:context:instrument_host:spacecraft.co instrument_to_instrument_host urn:nasa:pds:context:facility:observatory.dsn instrument_to_facility A description of the ground portion of the radio science instrument. urn:nasa:pds:radiosci.documentation:dsn.810-005 context_to_associate DSN document 810-005 is the Telecommunication Link Design Handbook for the NASA Deep Space Network. It contains design data for flight projects using the NASA DSN. The document is modular, and modules are updated as appropriate. This reference is to a PDS4 collection; products within the collection are versions of the Handbook, released at various times. Modules include: 001 Handbook Introduction 101 70-m Subnet Telecommunications Interfaces 102 26-m Subnet Telecommunications Interfaces (omitted in 2009 and later versions) 103 34-m HEF Subnet Telecommunications Interfaces 104 34-m BWG Antennas Telecommunications Interfaces 105 Atmospheric and Environmental Effects 106 Solar Corona and Solar Wind Effects 107 Radio Source Catalog 201 Frequency and Channel Assignments 202 34-m and 70-m Doppler 203 Sequential Ranging 205 Command Service 206 Telemetry General Information 207 34-m and 70-m Telemetry Reception 208 Telemetry Data Decoding 209 Open-Loop Radio Science 210 Delta Differential One-way Ranging 211 Wideband Very Long Baseline Interferometry 214 Pseudonoise and Regenerative Ranging 301 Coverage and Geometry (includes antenna coordinates) 302 Antenna Positioning 303 Media Calibration 304 Frequency and Timing 305 Test Support 901 Handbook Glossary urn:nasa:pds:radiosci.documentation:document:asmar.2014 instrument_to_document User Guide for Cassini radio science data. Asmar, S. W., N. A. Renzetti, The Deep Space Network as an Instrument for Radio Science Research, JPL Publication 80-93, Rev. 1, April 15, 1993. An overview of the accomplishments of the NASA Deep Space Network in the field of radio science and a summary of current and planned capabilities as of the early 1990s. The radio science implementation for the Cassini mission to Saturn and Titan is used as an example of planning. Deep Space Mission Systems, Tracking and Navigation Service, Requirements and Design, DSMS No. 821-104, Rev. B, JPL D-17235, Jet Propulsion Laboratory, Pasadena, CA, 2003. A document providing requirements for the Tracking and Navigation Service within the Deep Space Mission System. Deep Space Mission Systems, Radio Science Service, Requirements and Design, DSMS No. 821-110, Rev. A, JPL D-17241, Jet Propulsion Laboratory, Pasadena, CA, 2001. A document establishing the functional requirements for the Deep Space Mission Systems Radio Science Service for the 1999 through 2008 time period. The requirements focus at the service level, mainly in the areas of external interface requirements (requirements to other services), Radio Science service functional requirements, Radio Science service performance requirements, reliability, maintainability requirements, and design and implementation constraints. Deep Space Mission System/Cassini Project Network Operations Plan, JPL Document DSN 871-011, March 2003. A document containing guidelines for support of the Cassini-Huygens mission, categorizes the Deep Space Network (DSN) operations functions, provides systems configuration, and details the DSN operating procedures necessary to prepare and train for committed support to the project. Kliore, A.J., J.D. Anderson, J.W. Armstrong, S.W. Asmar, C.L. Hamilton, N.J. Rappaport, H.D. Wahlquist, R. Ambrosini, F.M. Flasar, R.G. French, L. Iess, E.A. Marouf, and A.F. Nagy, Cassini Radio Science, Space Science Reviews, 115, 1, 1-70, November 2004. The Cassini Radio Science Team paper, published as the Cassini Orbiter began its science observations within the Saturn system. Radio science investigations began during the cruise phase of the mission and included searches for gravitational waves and solar conjunction observations. During the Saturnian Tour, atmospheric, ionospheric, ring, and satellite occultations were observed, and determinations of masses and gravity fields were extracted from radio tracking data. New technologies in the construction of the instrument, which consisted of a portion on-board the spacecraft and another portion on the ground, were described in the paper. These included the use of a Ka-band signal, in addition to those at S- and X-bands, opening new opportunities for important discoveries in each of the above scientific areas due to increased accuracy, resolution, sensitivity, and dynamic range. Radio Science Subsystem Radio Science not applicable not applicable The Cassini Radio Science instrument included elements on both the spacecraft and the ground. The spacecraft element (covered by this context product) was further distributed among several subsystems on the Orbiter, while the ground element included NASA Deep Space Network (DSN) complexes in California, Australia, and Spain and occasional support from other ground stations such as antennas of the European Space Agency tracking network. The Radio Science 'instrument' operated in two fundamental modes. For 'two-way' measurements, the 'uplink' signal from the ground could be a single carrier at either X-band (7.2 GHz) or Ka-band (34 GHz); or both carriers could be transmitted at the same time. The spacecraft radio equipment then acted as a repeater, collecting the carrier signal with the spacecraft High Gain Antenna (HGA) and transforming it to one or more 'downlink' frequencies (2.3 GHz, 8.4 GHz, or 32 GHz) by elements in the Radio Frequency Subsystem (RFS) and Radio Frequency Instrument Subsystem (RFIS). For 'one-way' measurements, the signal source was on board the Cassini Orbiter; the output from an Ultrastable Oscillator (USO) was transformed to downlinks at 2.3, 8.4, or 32 GHz. The downlink signals were amplified and radiated through the HGA toward Earth. After passing through the medium of interest (e.g., plasma, rings, a neutral atmosphere or gravitationally curved space), the perturbed signal was collected by a ground antenna, amplified, down-converted, and recorded for later analysis.