PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM LABEL_REVISION_NOTE = "M.K. GORDON, 2002-12-14; S.L. Adams, 2003-06-11: edited to conform to AGU and PDS standards; D. OLSON, 2003-12-31" OBJECT = REFERENCE REFERENCE_KEY_ID = "ALLAN1966" REFERENCE_DESC = "Allan, D.W., Statistics of Atomic Frequency Standards, Proceedings of the IEEE, 54, 221-230, 1966." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ANDERSONETAL1987B" REFERENCE_DESC = "Anderson, J.D., J.K. Campbell, R.A. Jacobson, D.N. Sweetnam, A.H. Taylor, A.J.R. Prentice, and G.L. Tyler, Radio Science with Voyager 2 at Uranus: Preliminary Results on Masses and Densities of the Planet and Five Principal Satellites, Journal of Geophysical Research, 92, 14877-14883, 1987." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ANDERSONETAL1987" REFERENCE_DESC = "Anderson, J.D., T.P. Krisher, S.E. Borutzki, M.J. Connally, P.E. Eshe, H.B. Hotz, S. Kinslow, E.R. Kursinski, L.B. Light, S.E. Matousek, K.I. Moyd, D.C. Roth, D.N. Sweetnam, A.H. Taylor, G.L. Tyler, D.L. Gresh, and P.A. Rosen, Radio Range Measurements of Coronal Electron Densities at 13 and 3.6 Centimeter Wavelengths During the 1985 Solar Conjunction of Voyager 2, Astrophysical Journal, 323, 141-143, 1987." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ASMAR&HERRERA1993" REFERENCE_DESC = "Asmar, S.W., and R.G. Herrera, Radio Science Handbook, JPL D-7938, Volume 4, Jet Propulsion Laboratory, Pasadena, CA, 22 January 1993." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ASMARETAL1995" REFERENCE_DESC = "Asmar, S.W., R.G. Herrera, and T. Priest, Radio Science Handbook, JPL D-7938 Volume 6, Jet Propulsion Laboratory, Pasadena, CA, 1995." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ASMAR&RENZETTI1993" REFERENCE_DESC = "Asmar, S.W., and N.A. Renzetti, The Deep Space Network as an Instrument for Radio Science Research, Jet Propulsion Laboratory Publication 80-93, Rev. 1, 15 April 1993." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "BACHMAN1993" REFERENCE_DESC = "Bachman, N., P_constants (PcK) SPICE kernel file, Planetary Data System - Navigation Ancillary Information Facility, Jet Propulsion Laboratory, 11 August 1993." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "BENNER1997" REFERENCE_DESC = "Benner, L.A.M., Triton, in Encyclopedia of Planetary Sciences, edited by J.H. Shirley and R.W. Fairbridge, Chapman and Hall, London, 836-840, 1997." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "BIRDETAL1997" REFERENCE_DESC = "Bird, M.K., R. Dutta-Roy, S.W. Asmar, and T.A. Rebold, Detection of Titan's Ionosphere from Voyager 1 Radio Occultation Observations, Icarus, 130, 426-436, 1997." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "BURATTI1997" REFERENCE_DESC = "Buratti, B.J., Satellite, Natural, in Encyclopedia of Planetary Sciences, edited by J.H. Shirley and R.W. Fairbridge, Chapman and Hall, London, 705-708, 1997." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "CUNNINGHAM1997" REFERENCE_DESC = "Cunningham, C.C., Titan, in Encyclopedia of Planetary Sciences, edited by J.H. Shirley and R.W. Fairbridge, Chapman and Hall, London, 831-833, 1997." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "CUZZIETAL1984" REFERENCE_DESC = "Cuzzi, J.N., J.J. Lissauer, L.W. Esposito, J.B. Holberg, E.A. Marouf, G.L. Tyler, and A. Boischot, Saturn's Rings: Properties and Processes, in Planetary Rings, edited by R. Greenberg and A. Brahic, University of Arizona Press, Tucson, 73-199, 1984." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "DAVIESETAL1996A" REFERENCE_DESC = "Davies, M.J., V.K. Abalakin, M. Bursa, J.H. Lieske, B. Morando, D. Morrison, P.K. Seidelmann, A.T. Sinclair, B. Yallop, and Y.S. Tjuflin, Report of the IAU/IAG/COSPAR Working Group on Cartographic Coordinates and Rotational Elements of the Planets and Satellites: 1994, Celestial Mechanics and Dynamical Astronomy, 63, 127-148, 1996." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "DSN810-5" REFERENCE_DESC = "Deep Space Network / Flight Project Interface Design Book, Document 810-5, Jet Propulsion Laboratory, Pasadena, CA." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ESHLEMANETAL1977" REFERENCE_DESC = "Eshleman, V.R., G.L. Tyler, J.D. Anderson, G. Fjeldbo, G.S. Levy, G.E. Wood, and T.A. Croft, Radio Science Investigations with Voyager, Space Science Reviews, 21, 207-232, 1977." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ESHLEMANETAL1979" REFERENCE_DESC = "Eshleman, V.R., G.L. Tyler, G.E. Wood, G.F. Lindal, J.D. Anderson, G.S. Levy, and T.A. Croft, Radio Science with Voyager 1 at Jupiter: Preliminary Profiles of the Atmosphere and Ionosphere, Science, 204, 976-978, 1979." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ESHLEMANETAL1979B" REFERENCE_DESC = "Eshleman, V.R., G.L. Tyler, G.E. Wood, G.F. Lindal, J.D. Anderson, G.S. Levy, and T.A. Croft, Radio Science with Voyager at Jupiter: Initial Voyager 2 Results and a Voyager 1 Measure of the Io Torus, Science, 206,959-962, 1979." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ESHLEMANETAL1983" REFERENCE_DESC = "Eshleman, V.R., J.V. Breakwell, G.L. Tyler, and E.A. Marouf, W-shaped Occultation Signatures - Inference of Entwined Particle Orbits in Charged Planetary Ringlets, Icarus, 54, 212-226, 1983." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ESPOSITOETAL1983A" REFERENCE_DESC = "Esposito, L.W., N. Borderies, P. Goldreich, J.N. Cuzzi, J.B. Holberg, A.L. Lane, R.B. Pomphrey, R.J. Terrile, J.J. Lissauer, E.A. Marouf, and G.L. Tyler, Eccentric Ringlet in the Maxwell Gap at 1.45 Saturn Radii: Multi-Instrument Voyager Observations, Science, 222, 57-60, 1983." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ESPOSITOETAL1991" REFERENCE_DESC = "Esposito, L.W., A. Brahic, J.A. Burns and E.A. Marouf, Particle Properties and Processes in Uranus' Rings, in Uranus, edited by J.T. Bergstralh, E.D. Miner and M.S. Matthews, University of Arizona Press, Tucson, 410-465, 1991." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "FRENCHETAL1991" REFERENCE_DESC = "French, R.G., P.D. Nicholson, C.C. Porco and E.A. Marouf, Dynamics and Structure of the Uranian Rings, in Uranus, edited by J.T. Bergstralh, E.D. Miner and M.S. Matthews, University of Arizona Press, Tucson, 327-409, 1991." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "FRENCHETAL1993" REFERENCE_DESC = "French, R.G., P.D. Nicholson, M.L. Cooke, J.L. Elliot, K. Matthews, O. Perkovic, E. Tollestrup, P. Harvey, N.J. Chanover, M.A. Clark, E.W. Dunham, W. Forrest, J. Harrington, J. Pipher, A. Brahic, I. Grenier, F. Roques, and M. Arndt, Geometry of the Saturn system from the 3 July 1989 Occultation of 28 Sgr and Voyager observations, Icarus, 103, 163-214, 1993." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "GEO-10REVD" REFERENCE_DESC = "DSN Geometry and Spacecraft Visibility, Document 810-5, Rev. D, Vol. 1, DSN/Flight Project Interface Design, Jet Propulsion Laboratory, Pasadena, CA, 1987." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "GRAPSETAL1995" REFERENCE_DESC = "Graps, A.L., M.R. Showalter, J.J. Lissauer, and D.M. Kary, Optical Depth Profiles and Streamlines of the Uranian Epsilon Ring, Astron. J., 109, 2262-2273, 1995." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "GRESHETAL1989" REFERENCE_DESC = "Gresh, D.L., E.A. Marouf, G.L. Tyler, P.A. Rosen, and R.A. Simpson, Voyager Radio Occultation by Uranus' Rings I: Observational Results, Icarus, 78, 131-168, 1989." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "GURROLA1995" REFERENCE_DESC = "Gurrola, E.M., Interpretation of Radar Data from the Icy Galilean Satellites and Triton, Ph.D. dissertation, Stanford University, Palo Alto, CA, 126 pp., 1995." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "HINSON1984" REFERENCE_DESC = "Hinson, D.P., Magnetic Field Orientations in Saturn's Upper Ionosphere Inferred from Voyager Radio Occultations, Journal of Geophysical Research, 89, 65-73, 1984." END_OBJECT = REFERENCE REFERENCE_KEY_ID = "HUIETAL1991" REFERENCE_DESC = "Hui, J., L. Horn, and A. Lane, Particle Sizes of the Delta Ring's Inner Diffuse Companion through Comparison of RSS and PPS Equivalent Depths, Icarus, 93, 347-353, 1991." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "JPLPD618-128" REFERENCE_DESC = "Voyager Neptune/Interstellar Mission: Flight Science Office Science and Mission Systems Handbook, JPL Project Document 618-128, Jet Propulsion Laboratory, Pasadena, CA, 1987." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "KOHLHASE1989" REFERENCE_DESC = "Kohlhase, C., The Voyager Neptune Travel Guide, JPL Publication 89-24, 276 pp., Jet Propulsion Laboratory, Pasadena, CA, 1989." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "KRISHERETAL1990" REFERENCE_DESC = "Krisher, T.P., J.D. Anderson, and J.K. Campbell, Test of the Gravitational Redshift Effect at Saturn, Physical Review Letters, 64, 1322-1325, 1990." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "LEVYETAL1981" REFERENCE_DESC = "Levy, G.S., D.W. Green, H.N. Royden, G.E. Wood, and G.L. Tyler, Dispersive Doppler Measurement of the Electron Content of the Torus of Io, Journal of Geophysical Research, 86, 8467-8470, 1981." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "LINDALETAL1981" REFERENCE_DESC = "Lindal, G.F., G.E. Wood, G.S. Levy, J.D. Anderson, D.N. Sweetnam, H.B. Hotz, B.J. Buckles, D.P. Holmes, P.E. Doms, V.R. Eshleman, G.L. Tyler, and T.A. Croft, The Atmosphere of Jupiter - An Analysis of the Voyager Radio Occultation Measurements, Journal of Geophysical Research, 86, 8721-8727, 1981." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "LINDALETAL1983" REFERENCE_DESC = "Lindal, G.F., G.E. Wood, H.B. Hotz, D.N. Sweetnam, V.R. Eshleman, and G.L. Tyler, The Atmosphere of Titan: An Analysis of the Voyager 1 Radio Occultation Measurements, Icarus, 53, 348-363, 1983." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "LINDALETAL1985" REFERENCE_DESC = "Lindal, G.F., D.N. Sweetnam, and V.R. Eshleman, The Atmosphere of Saturn: An Analysis of the Voyager Radio Occultation Measurements, Astronomical Journal, 90, 1136-1146, 1985." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "LINDALETAL1987" REFERENCE_DESC = "Lindal, G.F., J.R. Lyons, D.N. Sweetnam, V.R. Eshleman, D.P. Hinson, and G.L. Tyler, The Atmosphere of Uranus: Results of Radio Occultation Measurements with Voyager 2, Journal of Geophysical Research, 92, 14987-15001, 1987." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "LINDALETAL1990" REFERENCE_DESC = "Lindal, G.F., J.R. Lyons, D.N. Sweetnam, V.R. Eshleman, D.P. Hinson, and G.L. Tyler, The Atmosphere of Neptune: Results of Radio Occultation Measurements with the Voyager 2 Spacecraft, Geophysical Research Letters, 17, 1733-1736, 1990." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "MAROUF&TYLER1982" REFERENCE_DESC = "Marouf, E.A., and G.L. Tyler, Microwave Edge Diffraction by Features in Saturn's Rings: Observations with Voyager 1, Science, 217, 243-245, 1982." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "MAROUFETAL1982" REFERENCE_DESC = "Marouf, E.A., G.L. Tyler, and V.R. Eshleman, Theory of Radio Occultation by Saturn's rings, Icarus, 49, 161-193, 1982." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "MAROUFETAL1983" REFERENCE_DESC = "Marouf, E.A., G.L. Tyler, H.A. Zebker, R.A. Simpson, and V.R. Eshleman, On Obtaining the Forward Phase Functions of Saturn Ring Features from Radio Occultation Observations, Icarus, 54, 189-211, 1983." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "MAROUF&TYLER1985" REFERENCE_DESC = "Marouf, E.A., and G.L. Tyler, Radio Occultation by Saturn's Rings: Observation of Structure and Particle Size with Voyager 1, Advances in Space Research, 5, 117-120, 1985." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "MAROUFETAL1986" REFERENCE_DESC = "Marouf, E.A., G.L. Tyler, and P.A. Rosen, Profiling Saturn's Rings by Radio Occultation, Icarus, 68, 120-166, 1986." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "MORRISON1982" REFERENCE_DESC = "Morrison, D., Voyages to Saturn, NASA SP-451, 227 pp., National Aeronautics and Space Administration, Washington, DC, 1982." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ROSENETAL1991A" REFERENCE_DESC = "Rosen, P.A., G.L. Tyler, and E.A. Marouf, Resonance Structures in Saturn's Rings Probed by Radio Occultation. I - Methods and Examples, Icarus,93, 3-24, 1991." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ROSENETAL1991B" REFERENCE_DESC = "Rosen, P.A., G.L. Tyler, E.A. Marouf,and J.J. Lissauer, Resonance Structures in Saturn's Rings Probed by Radio Occultation. II - Results and Interpretation, Icarus, 93, 25-44, 1991." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "SIMPSONETAL1984" REFERENCE_DESC = "Simpson, R.A., G.L. Tyler, E.A. Marouf, H.A. Zebker, and V.R. Eshleman, Saturn's rings - Voyager 1 radio occultation experiment results, ITGRS, 22, 656-665, 1984." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "SIMPSONETAL1983B" REFERENCE_DESC = "Simpson, R.A., G.L. Tyler, E.A. Marouf, H.A. Zebker, and V.R. Eshleman, Characterization of Particles in Saturn's Rings - Voyager 1 Radio Occultation Experiment, IGARSS, 1, 8, 1983." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "STONE&LANE1979A" REFERENCE_DESC = "Stone, E.C., and A.L. Lane, Voyager 1 Encounter with the Jovian System, Science, 204, 945-948, 1979." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "STONE&LANE1979B" REFERENCE_DESC = "Stone, E.C., and A.L. Lane, Voyager 2 Encounter with the Jovian System, Science, 206, 925-927, 1979." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "STONE&MINER1981" REFERENCE_DESC = "Stone, E.C., and E.D. Miner, Voyager 1 Encounter with the Saturnian System, Science, 212, 159-163, 1981." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "STONE&MINER1982" REFERENCE_DESC = "Stone, E.C., and E.D. Miner, Voyager 2 Encounter with the Saturnian System, Science, 215, 499-504, 1982." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "STONE&MINER1986" REFERENCE_DESC = "Stone, E.C., and E.D. Miner, Voyager 2 Encounter with the Uranian System, Science, 233, 39-43, 1986." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "STONE&MINER1989" REFERENCE_DESC = "Stone, E.C., and E.D. Miner, Voyager 2 Encounter with the Neptunian System, Science, 246, 1417-1421, 1989." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "TYLERETAL1981B" REFERENCE_DESC = "Tyler, G. L., V.R. Eshleman, J.D. Anderson, G.S. Levy, G.F. Lindal, G.E. Wood, and T.A. Croft, Radio Science Investigation of the Saturn System with Voyager 1: Preliminary Results, Science, 212, 201-206, 1981." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "TYLERETAL1981" REFERENCE_DESC = "Tyler, G. L., E.A. Marouf, and G.E. Wood, Radio Occultation of Jupiter's Rings: Bounds on Optical Depth and Particle Size, Journal of Geophysical Research, 86, 8699-8703, 1981." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "TYLERETAL1982" REFERENCE_DESC = "Tyler, G. L., V.R. Eshleman, J.D. Anderson, G.S. Levy, G.F. Lindal, G.E. Wood, and T.A. Croft, Radio Science with Voyager 2 at Saturn: Atmosphere and Ionosphere and the Masses of Mimas, Tethys, and Iapetus, Science, 215, 553-558, 1982." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "TYLERETAL1983" REFERENCE_DESC = "Tyler, G.L., E.A. Marouf, R.A. Simpson, H. A. Zebker, and V.R. Eshleman, The Microwave Opacity of Saturn's Rings at Wavelengths of 3.6 and 13 cm from Voyager 1 Radio Occultation, Icarus, 54, 160-188, 1983." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "TYLERETAL1986" REFERENCE_DESC = "Tyler, G.L., D.N. Sweetnam, J.D. Anderson, J.K. Campbell, V.R. Eshleman, D.P. Hinson, G.S. Levy, G.F. Lindal, E.A. Marouf, and R.A. Simpson, Voyager 2 Radio Science Observations of the Uranian System: Atmosphere, Rings, and Satellites, Science, 233, 79-84, 1986." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "TYLER1987" REFERENCE_DESC = "Tyler, G. L., Radio Propagation Experiments in the Outer Solar System with Voyager, Proceedings of the IEEE, 75, 1404-1431, 1987." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "TYLERETAL1989" REFERENCE_DESC = "Tyler, G.L., D.N. Sweetnam, J.D. Anderson, S.E. Borutzki, J.K. Campbell, V.R. Eshleman, D.L. Gresh, E.M. Gurrola, D.P. Hinson, N. Kawashima, E.R. Kursinski, G.S. Levy, G.F. Lindal, J.R. Lyons, E.A. Marouf, P.A. Rosen, R.A. Simpson, and G.E. Wood, Voyager Radio Science Observations of Neptune and Triton, Science, 246, 1466-1473, 1989." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "TYLERETAL1992" REFERENCE_DESC = "Tyler, G.L., G. Balmino, D.P. Hinson, W.L. Sjogren, D.E. Smith, R. Woo, S.W. Asmar, M.J. Connally, C.L. Hamilton, and R.A. Simpson, Radio Science Investigations with Mars Observer, Journal of Geophysical Research, 97, 7759-7779, 1992." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "WOO1993" REFERENCE_DESC = "Woo, R., Spacecraft Radio Scintillation and Solar System Exploration, Wave Propagation in Random Media (Scintillation), Society of Photo-Optical Instrumentation Engineers, Bellingham, WA, 1993." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ZEBKERETAL1983" REFERENCE_DESC = "Zebker, H.A., G.L. Tyler, and E.A. Marouf, On Obtaining the Forward Phase Functions of Saturn Ring Features from Radio Occultation Observations, Icarus, 56, 209-228, 1983." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ZEBKER&TYLER1984" REFERENCE_DESC = "Zebker, H.A., and G.L. Tyler, Thickness of Saturn's Rings Inferred from Voyager 1 Observations of Microwave Scatter, Science, 223, 396-398, 1984." END_OBJECT = REFERENCE OBJECT = REFERENCE REFERENCE_KEY_ID = "ZEBKERETAL1985" REFERENCE_DESC = "Zebker, H.A., E.A. Marouf, and G.L. Tyler, Saturn's Rings: Particle Size Distributions for Thin Layer Models, Icarus, 64, 531-548, 1985." END_OBJECT = REFERENCE END