Ulysses URAP RAR Average E-Field at 144 Seconds Data Description Ulysses URAP - Unified Radio and Plasma Wave Experiment Bundle PDS3 DATA_SET_ID = ULY-J-URAP-4-SUMM-RAR-AVG-E-144S-V1.0 ORIGINAL DATA_SET_NAME = ULY JUP URAP RADIO ASTRONOMY REC AVERAGE E-FIELD 144 SEC START_TIME = 1992-01-01T00:00:00.000 STOP_TIME = 1992-04-30T23:57:36.000 PDS3 DATA_SET_RELEASE_DATE = 1998-05-01 PRODUCER_FULL_NAME = ROGER HESS Collection Overview =================== C USER'S GUIDE TO RAR 144 SECOND AVERAGED DATA FILES This document describes the contents and format of the RAR 144 second averaged data files. The time period of 144 seconds was used for the averaging period because that is the basic cycling time of the instrument. The RAR continually cycles through a list of frequencies. There are 16 lists and the list currently in use is chosen by telecommand. The time period to complete the list is 144 seconds for the high band of the receiver (for telemetry bit rates of 1024 and 512 bps, the cycle time is 64 seconds for bit rates of 256 and 128 bps), after which the instrument begins with the list again. Therefore this period was chosen for the averaging period. The format of the data is indicated by the following Fortran statement which can be used to read the data: DIMENSION F(0:75) READ(A24,5(1X,A1),75(1X,1PE11.4)) + TIME, LO_POL_MODE, LO_SUM_MODE, + HI_POL_MODE, HI_SUM_MODE, IBPS, F The variables are defined as follows: The date and time of the beginning of the averaging period is given in TIME in the format yyyy-mm-ddThh:mm:ss.sssZ. LO_POL_MODE and HI_POL_MODE are the polarization modes of the low and high receiver bands. Their values are defined as: 1: Polarization on. 2: Polarization off. 3: Polarization mode switched during the averaging interval. 4: Polarization mode was unknown (usually due to a data gap). LO_SUM_MODE and HI_SUM_MODE are the polarization modes of the low and high receiver bands. Their values are defined as: 1: Summation on. 2: Summation off. 3: Summation mode switched during the averaging interval. 4: Summation mode was unknown (usually due to a data gap). IBPS indicates the telemetry bit rate during the averaging interval. Its values are defined as: 1: 128 bps. 2: 256 bps. 3: 512 bps. 4: 1024 bps. 5: Bit rate changed during the averaging period. 6: Bit rate unknown - usually due to a data gap. F is a vector containing the average signal for the 76 frequencies of the low and high bands. Elements 0 through 63 are from the low band receiver and correspond to frequencies of 1.25+0.75*N KHz where N is the element number (0..63). The frequency channels from 64 to 75 correspond to the following frequencies: F(64): 52 KHz F(65): 63 KHz F(66): 71 KHz F(67): 100 KHz F(68): 120 KHz F(69): 148 KHz F(70): 196 KHz F(71): 272 KHz F(72): 387 KHz F(73): 540 KHz F(74): 740 KHz F(75): 940 KHz The units of the data are microvolt/Hz**.5 measured at the receiver input terminals. To convert to electric field strength the given data must be divided by the effective length of the antenna. This is complicated by the fact that the effective length depends on the antenna impedance which is affected by the plasma conditions local to the Ulysses spacecraft. The impedance will also depend on the frequency. In general, the RAR frequency channels that are well above the local electron plasma frequency are not affected by the plasma conditions and the effective length of 23 meters can be used. When the RAR is in summed, rather than separate, mode the determination of field strengths is even more difficult. References: =========== Barrow, C.H., and A. Lecacheux, Radio Emission from Jupiter Observed by Ulysses Before and After Encounter, Astron. Astrophys, 271, 335-343, 1993. Canu, P., N. Cornilleau-Werhlin, C. de Villedary, P.J. Kellogg, C.C. Harvey, and R.J. MacDowall, Observation of Electron Plasma Waves Upstream of Jupiter's Bow Shock by the URAP Experiment on board the Ulysses Spacecraft, in Proc. of the 2nd European Workshop on Collisionless Shocks, Issy-les-Moulineaux, France, 30 Sept-2 Oct 1992. (https://doi:10.1016/0032-0633(93)90088-J) Canu, P., N. Cornilleau-Werhlin, C. de Villedary, P.J. Kellogg, C.C. Harvey, and R.J. MacDowall, Observations of Electron Plasma Waves Upstream of the Jovian Bow Shock, Plan. Space Sci., 41, 811-822, 1993. (https://doi:10.1016/0032-0633(93)90088-J) Desch, M.D., Jupiter Radio Bursts and Particle Acceleration, Ap. J. Supp., 90 541-546, 1994. (https://doi:10.1086/191872) Desch, M.D., W.M. Farrell, and M.L. Kaiser, Asymmetries in the Io plasma torus, J. Geophys. Res., 99, 17205-17210, 1994. (https://doi.org/10.1029/94JA01615) Farrell, W.M., R.J. MacDowall, M.D. Desch, M.L. Kaiser, R.G. Stone, P.J. Kellogg, N. Lin, N. Cornilleau-Wehrlin, P. Canu, S.J. Bame, and J.L. Phillips, Ulysses Observations of Auroral Hiss at High Jovian Latitudes, Geophys. Res. Let., 20, 2259-2262, 1993. (https://doi.org/10.1029/93GL01120) Farrell, W.M., R.J. MacDowall, R.A. Hess, M.L. Kaiser, M.D. Desch, and R.G. Stone, An Interpretation of the Broadband VLF Waves near the Io Torus as Observed by Ulysses, J. Geophys. Res., 98, 21177-21188, 1993. (https://doi.org/10.1029/93JA02591) Hoang, S., N. Meyer-Vernet, M. Moncuquet, A. Lecacheux, and B.M. Pedersen, Electron Density and Temperature in the Io Torus from Ulysses thermal plasma noise measurements, Plan. Space Sci. 41, 1011-1020, 1993. (https://doi:10.1016/0032-0633(93)90105-B) Kaiser, M.L., and M.D. Desch, in Planetary Radio Emissions III, Jovian Broadband Kilometric Radiation: New Observations from Ulysses, Proc. of the Third International Workshop, Graz, Austria, H.O Rucker, S.J. Bauer, and M.L. Kaiser, eds., pp. 35-43, 1992. Kaiser, M.L., M.D. Desch, W.M. Farrell, R.J. MacDowall, R.G. Stone, A. Lecacheux, B.-M. Pedersen, and P. Zarka, Ulysses Observations of Escaping VLF Emissions from Jupiter, Geophys. Res. Let., 19, 649-652, 1992. (https://doi:10.1029/92GL00387) Kaiser, M.L., Time-variable Magnetospheric Radio Emissions from Jupiter, J. Geophys. Res., Vol. 98, pp. 18757-18765, 1993. (https://doi.org/10.1029/93JE01279) Kaiser, M.L., M.D. Desch, and W.M. Farrell, Clock-like Behavior of Jovian Continuum Radiation, Plan. Space Sci., 41, 1073-1077, 1993. (https://doi:10.1016/0032-0633(93)90110-N) Kaiser, M.L., M.D. Desch, W.M. Farrell, R.A. Hess, and R.J. MacDowall, Ordinary and Z-Mode Emissions from the Jovian Polar Region, Plan. Space Sci., 41, 977-985, 1993. (https://doi:10.1016/0032-0633(93)90102-8) Kellogg, P.J., K. Goetz, R.L. Howard, S.J. Monson, A. Balogh, and R.J. Forsyth, Measurement of Electric Fields and Plasma Flow Speeds in Jupiter's Magnetosphere, J. Geophys. Res., 98, 13307-13314, 1993. (https://doi.org/10.1029/92JA02982) Lecacheux, A., B.-M. Pedersen, P. Zarka, M.G. Aubier, M.L. Kaiser, M.D. Desch, W.M. Farrell, R.J. MacDowall, and R.G. Stone, In Ecliptic Observations of Jovian Radio Emissions by Ulysses: Comparison with Voyager Results, Geophys. Res. Let., 19, 1307-1310, 1992. (https://doi.org/10.1029/92GL01037) Lin, N., P.J. Kellogg, R.J. MacDowall, Y. Mei, N. Cornilleau- Wehrlin, P. Canu, C. de Villedary, L. Rezeau, A. Balogh, and R.J. Forsyth, ULF Waves in the Io Torus: Ulysses Observations, J. Geophys Res., 98, 21151-21162, 1993. (https://doi.org/10.1029/93JA02593) Lin, N., P.J. Kellogg, J.P. Thiessen, D. Lengyel-Frey, B.T. Tsurutani, and J.L. Phillips, Whistler Mode Waves in the Jovian Magnetosheath, J. Geophys. Res., 99, 23527, 1994. (https://doi.org/10.1029/94JA01998) MacDowall, R.J., M.L. Kaiser, M.D. Desch, W.M. Farrell, R.A. Hess, and R.G. Stone, Quasiperiodic Jovian Radio Bursts: Observations from the Ulysses Radio and Plasma Wave Experiment, Plan. Space Sci., 41, 1059-1072, 1993. (https://doi:10.1016/0032-0633(93)90109-F) Meyer-Vernet, N., S. Hoang, and M. Moncuquet, Bernstein Waves in the Io Torus: a Novel Kind of Electron Temperature Sensor, J. Geophys. Res., 98, 21163-21176, 1993. (https://doi.org/10.1029/93JA02587) Osherovich, V., R.F. Benson, J. Fainberg, R.G. Stone, and R.J. MacDowall, Sounder Stimulated Dn Resonances in Jupiter's Io Plasma Torus, J. Geophys. Res., 98, 18751-18756, 1993. (https://doi.org/10.1029/93JE01481) Reiner, M.J., J. Fainberg, R.G. Stone, R. Manning, M.L. Kaiser, M.D. Desch, B.-M. Pedersen, and P. Zarka, Source Characteristics of Jovian Narrow-Band Kilometric Radio Emissions, J. Geophys. Res., 98, 13163-13176, 1993. (https://doi.org/10.1029/93JE00536) Reiner, M.J., J. Fainberg, and R.G. Stone, Source Characteristics of Jovian Hectometric Emissions, J. Geophys. Res., 98, 18767-18777, 1993. (https://doi.org/10.1029/93JE01779) Reiner, M.J., J. Fainberg, and R.G. Stone, A New Component of Jovian Kilometric Radio Emission, J. Geophys. Res., 99, 6137-6144, 1994. (https://doi.org/10.1029/93JA03398) Stone, R.G., B.-M. Pedersen, C.C. Harvey, P. Canu, N. Cornilleau- Wehrlin, M.D. Desch, C. de Villedary, J. Fainberg, W.M. Farrell, K. Goetz, R.A. Hess, S. Hoang, M.L. Kaiser, P.J. Kellogg, A. Lecacheux, N. Lin, R.J. MacDowall, R. Manning, C.A. Meetre, N. Meyer-Vernet, M. Moncuquet, V. Osherovich, M.J. Reiner, A. Tekle, J. Thiessen, and P. Zarka, Ulysses Radio and Plasma Wave Observations in the Jupiter Environment, Science, 257, 1524-1531, 1992. (https://doi.org/10.1126/science.257.5076.1524) Thiessen, J.P., and P.J. Kellogg, Langmuir Wave Decay and Collapse in the Jovian Foreshock, Plan. Space Sci., 41, 823-832, 1993. (https://doi:10.1016/0032-0633(93)90089-K) Zarka P., B. P. Pedersen, R. Prange, P. Ferrando, S. Hoang, and P. Canu, Quelques resultats marquants de la rencontre Ulysses-Jupiter, Bulletin de la S.F.P., 90, 3-9, 1993.