Ulysses URAP RAR Average E-Field at 10 Minutes Data Description
Ulysses URAP - Unified Radio and Plasma Wave Experiment Bundle
PDS3 DATA_SET_ID = ULY-J-URAP-4-SUMM-RAR-AVG-E-10MIN-V1.0
ORIGINAL DATA_SET_NAME = ULY JUP URAP RADIO ASTRONOMY REC
AVERAGE E-FIELD 10 MIN
START_TIME = 1991-11-26T00:00:00.000
STOP_TIME = 1992-06-07T23:50:00.000
PDS3 DATA_SET_RELEASE_DATE = 1998-05-01
PRODUCER_FULL_NAME = ROGER HESS
Collection Overview
===================
A UDS data files
Eight files are provided that conform to the UDS conventions
regarding the naming of files and the format of the data. The
eight files are divided into 4 pairs of files with each pair
consisting of a file containing data averaged over a 10 minute
period and a file containing the maximum data value during the
same 10 minute period. The 4 pairs of file contain data for
the RAR, the PFR, WFA - magnetic field, and WFA - magnetic
field.
A.1 Radio Astronomy Receiver
To reduce the size of the files produced, the UDS files
contain 25 frequency channels for the RAR - the upper 12
frequencies of the high receiver, and 13 lower frequencies
which are aggregates of the low frequency channels so that
they appear in approximately the same logarithmic steps as the
high frequency receiver. Since the low frequency receiver
steps are linear, there are different numbers of frequency
channels that are combined to produce the UDS data.
Following is a table giving the approximate center frequency
of each UDS channel and the RAR frequencies that were combined
to produce it.
UDS center RAR frequency
channel frequency channels
(kHz) (kHz)
1 1.25 1.25 Low receiver
2 2.00 2.00
3 2.75 2.75
4 3.50 3.50
5 4.25 4.25
6 5.75 5.00 - 6.5
7 8.00 7.25 - 8.75
8 11.0 9.50 - 12.5
9 14.75 13.25 - 16.25
10 19.25 17.00 - 21.50
11 24.50 22.25 - 26.75
12 31.25 27.50 - 35.00
13 42.50 35.75 - 48.50
14 52.0 52.0 High receiver
15 63.0 63.0
16 81.0 81.0
17 100.0 100.0
18 120.0 120.0
19 148.0 148.0
20 196.0 196.0
21 272.0 272.0
22 387.0 387.0
23 540.0 540.0
24 740.0 740.0
25 940.0 940.0
Two files are produced for each day: they contain averages
and peak values for 10 minute periods that start at 00:00:00
and end at 24:00:00. The time specified in the file is the
beginning of each time period.
The data are computed as follows: For all RAR data that falls
within the 10 minute period being considered the average and
peak values are found for each of the 76 channels. Next the
channels are combined to produce the 25 UDS channels: the
average of the combined channels yields the UDS averages and
the peak of the combined channels yields the UDS peak value.
Data
====
The names of the files are (following the PDS convention):
Tyyddd.TAB : Average data
Tyyddd.TAB : Peak data
where:
yy = Last two digits of year.
ddd = Day of year (001..366).
The files are Ascii and contain one line for each time period
(even if there are no valid data for a time period) so they
contain 144 lines each. The format of the data is indicated
by the following Fortran read statement which can be used to
read the files:
DIMENSION F(25)
READ(1,100) TIME,MODE_HI,MODE_LO,IBPS,F
100 FORMAT(A24,1X,A2,A1,A1,25(1X,1PE9.2))
where:
TIME: Spacecraft event time in the format
yyyy-mm-ddThh:mm:ss.sssZ.
MODE_HI: mode of the high receiver:
1: Receiver in summed mode (X and Z antenna combined).
2: Receiver in separate mode(only X antenna).
3: Receiver switched mode during averaging period.
4: Receiver mode unknown.
MODE_LO: mode of the low receiver
1: Receiver in summed mode (X and Z antenna combined).
2: Receiver in separate mode (only X antenna).
3: Receiver switched mode during averaging period.
4: Receiver mode unknown.
IBPS: telemetry bits-per-second
1: 128 bps.
2: 256 bps.
3: 512 bps.
4: 1024 bps.
5: Bit rate changed during averaging period.
6: Bit rate unknown.
F: frequency data - channels 1..25 as defined above.
Invalid or missing data are assigned the value -9.99e+10.
Units: 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.
Time resolution: 10 minutes.
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.
|