MIT Space Plasma Group Interplanetary Shock Analysis Pages Database: Wind Shock Analysis Event ID: 19981212121 05/01/1998 121.88984 2121 [UT]

General Information (About, Top)

Year	1998
Fractional day of year	121.889844
Arrival time of shock [seconds of day]	76882.5 ± 60.0
Shock type	FF
Electron data availability	0
X GSE location of spacecraft [Re]	215.910
Y GSE location of spacecraft [Re]	3.967
Z GSE location of spacecraft [Re]	25.927
Upstream plasma points selected for analysis	0009
Upstream field points selected for analysis	0270
Downstream plasma points selected for analysis	0008
Downstream field points selected for analysis	0282
Minimum chisq/dof for RH8,RH9,RH10	2.56, 3.99, 4.08
Event added to database	Mon Feb 14 11:06:21 2005
Event last processed	Sun Mar 13 10:46:40 2005
Method selected	RH08
Propagation delay to Earth [minutes]	36.546 ± 1.188

Asymptotic plasma parameters (About, Top)

Parameter	Upstream	Downstream
Vx GSE [km/s]	-461.4 ± 5.0	-564.9 ± 12.8
Vy GSE [km/s]	9.0 ± 10.9	-32.7 ± 10.2
Vz GSE [km/s]	-30.7 ± 8.5	-83.0 ± 21.2
Wi [km/s]	42.8 ± 1.5	72.8 ± 8.0
We [km/s]	1352.4 ± 47.7	2301.7 ± 251.8
Ni [n/cc]	4.6 ± 0.4	13.4 ± 2.1
Bx GSE [nT]	-5.7 ± 0.6	-7.3 ± 2.4
By GSE [nT]	3.8 ± 0.8	8.4 ± 4.0
Bz GSE [nT]	1.4 ± 0.9	6.7 ± 5.9
Plasma Beta	0.362 ± 0.354	0.716 ± 0.725
Sound Speed [km/s]	55.21 ± 1.95	93.97 ± 10.28
Alfven Speed [km/s]	71.93 ± 5.14	87.89 ± 6.52

Best values of shock front normal for each method (About, Top)

Method	Nx	Ny	Nz	Theta [degrees]	Phi [degrees]
MC	-0.946 ± 0.104	0.315 ± 0.295	0.080 ± 0.080	4.60 ± 26.91	161.60 ± 17.84
VC	-0.843 ± 0.084	-0.342 ± 0.119	-0.416 ± 0.390	-24.59 ± 10.39	202.08 ± 7.84
MX1	-0.982 ± 0.036	-0.059 ± 0.408	-0.181 ± 0.179	-10.44 ± 8.19	183.42 ± 23.80
MX2	-0.969 ± 0.065	-0.180 ± 0.323	-0.168 ± 0.167	-9.70 ± 8.55	190.49 ± 19.07
MX3	-0.961 ± 0.078	-0.231 ± 0.308	-0.153 ± 0.152	-8.78 ± 9.17	193.49 ± 18.35
RH08	-0.993 ± 0.002	-0.078 ± 0.019	-0.084 ± 0.084	-4.81 ± 1.35	184.51 ± 1.07
RH09	-0.993 ± 0.008	-0.096 ± 0.068	-0.061 ± 0.061	-3.52 ± 4.03	185.52 ± 3.95
RH10	-0.993 ± 0.008	-0.096 ± 0.068	-0.061 ± 0.061	-3.52 ± 4.03	185.52 ± 3.95
Average	-0.960	-0.096	-0.131	-7.597	185.829
Median	-0.969	-0.096	-0.084	-4.807	185.515
Deviation	0.051	0.191	0.143	8.386	11.583

Key shock parameters (About, Top)

Method	ThetaBn	Shock Speed	Compression
MC	18.8 ± 5.2	562.9 ± 19.4	2.90 ± 0.48
VC	65.7 ± 5.0	587.1 ± 19.9	2.90 ± 0.48
MX1	43.8 ± 5.2	632.7 ± 20.3	2.90 ± 0.48
MX2	49.4 ± 5.8	630.0 ± 20.0	2.90 ± 0.48
MX3	51.7 ± 6.0	625.8 ± 20.0	2.90 ± 0.48
RH08	42.1 ± 6.0	631.6 ± 20.2	2.90 ± 0.48
RH09	42.5 ± 6.3	629.9 ± 20.2	2.90 ± 0.48
RH10	42.5 ± 6.3	629.9 ± 20.2	2.90 ± 0.48
Average	44.6	616.2	2.90
Median	43.8	629.9	2.90
Deviation	13.1	26.3	0.00

Upstream wave speeds and mach numbers (About, Top)

Method	dV	Slow	Intermediate	Fast	Slow Mach	Fast Mach
MC	126.2 ± 7.6	49.3 ± 0.9	68.1 ± 4.9	76.2 ± 3.9	2.56 ± 0.13	1.66 ± 0.12
VC	188.6 ± 3.0	18.3 ± 0.2	29.5 ± 2.1	88.9 ± 3.1	10.31 ± 0.21	2.12 ± 0.08
MX1	174.7 ± 4.1	34.0 ± 0.4	51.9 ± 3.7	84.2 ± 3.2	5.14 ± 0.07	2.08 ± 0.08
MX2	179.3 ± 3.3	30.1 ± 0.4	46.8 ± 3.3	85.6 ± 3.2	5.96 ± 0.07	2.10 ± 0.07
MX3	179.8 ± 3.1	28.5 ± 0.4	44.6 ± 3.2	86.2 ± 3.1	6.31 ± 0.07	2.09 ± 0.06
RH8	171.4 ± 4.2	35.1 ± 0.4	53.3 ± 3.8	83.7 ± 3.2	4.88 ± 0.07	2.05 ± 0.07
RH9	170.5 ± 4.2	34.9 ± 0.4	53.0 ± 3.8	83.8 ± 3.2	4.89 ± 0.07	2.04 ± 0.07
RH10	170.5 ± 4.2	34.9 ± 0.4	53.0 ± 3.8	83.8 ± 3.2	4.89 ± 0.07	2.04 ± 0.07
Average	170.1	33.1	50.0	84.1	5.6	2.0
Median	174.7	34.9	53.0	84.2	5.1	2.1
Deviation	18.8	8.6	10.8	3.6	2.2	0.1

Downstream wave speeds and mach numbers (About, Top)

Method	dV	Slow	Intermediate	Fast	Slow Mach	Fast Mach
MC	45.6 ± 13.1	73.1 ± 3.8	83.2 ± 6.2	106.3 ± 5.2	0.62 ± 0.16	0.42 ± 0.10
VC	65.4 ± 12.0	26.7 ± 1.3	36.1 ± 2.7	126.3 ± 5.8	2.44 ± 0.36	0.52 ± 0.07
MX1	61.2 ± 13.0	49.8 ± 2.4	63.5 ± 4.7	119.0 ± 5.5	1.22 ± 0.22	0.51 ± 0.09
MX2	62.7 ± 12.3	44.0 ± 2.1	57.2 ± 4.2	121.3 ± 5.6	1.42 ± 0.23	0.51 ± 0.08
MX3	62.7 ± 11.9	41.7 ± 2.0	54.5 ± 4.0	122.1 ± 5.7	1.50 ± 0.24	0.51 ± 0.08
RH8	61.0 ± 12.6	51.5 ± 2.5	65.2 ± 4.8	118.3 ± 5.5	1.18 ± 0.21	0.51 ± 0.09
RH9	60.5 ± 12.5	51.1 ± 2.5	64.8 ± 4.8	118.5 ± 5.5	1.18 ± 0.21	0.51 ± 0.08
RH10	60.5 ± 12.5	51.1 ± 2.5	64.8 ± 4.8	118.5 ± 5.5	1.18 ± 0.21	0.51 ± 0.08
Average	59.9	48.6	61.1	118.8	1.3	0.5
Median	61.2	51.1	64.8	119.0	1.2	0.5
Deviation	6.0	12.9	13.2	5.7	0.5	0.0

Survey interval (About, Top)

Key plasma parameters

Velocity

Magnetic Field

Shock Speed (About, Top)

Theta Bn (About, Top)