CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Wind Shock Analysis
Event ID: 20020821124
Observation time: 03/23/2002 82.47509 1124 [UT]

Wind spacecraft

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Asymptotic parameters
Shock front normals
Key parameters
Wave speed and Mach numbers
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Selected
Simple methods
Rankine
Individual equations
Shock speed
Theta Bn
Mach numbers


General Information (About, Top)

Year 2002
Fractional day of year 82.475087
Arrival time of shock [seconds of day] 41047.5 ± 3.0
Shock type FF
Electron data availability 0
X GSE location of spacecraft [Re] 66.988
Y GSE location of spacecraft [Re] -69.615
Z GSE location of spacecraft [Re] -5.600
Upstream plasma points selected for analysis 0009
Upstream field points selected for analysis 0275
Downstream plasma points selected for analysis 0007
Downstream field points selected for analysis 0231
Minimum chisq/dof for RH8,RH9,RH10 8.15, 12.90, 13.41
Event added to database
Mon Feb 14 11:18:31 2005
Event last processed
Mon Mar 30 22:50:22 2009
Method selected
RH08
Propagation delay to Earth [minutes]
15.830 ± 0.422

Asymptotic plasma parameters (About, Top)

Parameter
Upstream
Downstream
Vx GSE [km/s] -399.7 ± 3.2 -477.2 ± 2.6
Vy GSE [km/s] 24.6 ± 9.0 -1.9 ± 1.8
Vz GSE [km/s] 18.3 ± 3.3 51.7 ± 4.2
Wi [km/s] 31.1 ± 1.7 34.7 ± 1.8
We [km/s] 984.9 ± 54.0 1098.6 ± 55.9
Ni [n/cc] 3.6 ± 0.3 9.3 ± 0.5
Bx GSE [nT] 2.0 ± 0.5 2.4 ± 0.5
By GSE [nT] 0.6 ± 1.7 -9.4 ± 1.8
Bz GSE [nT] 2.7 ± 0.5 4.2 ± 1.0
Plasma Beta
0.510 ± 0.497
0.216 ± 0.177
Sound Speed [km/s]
40.21 ± 2.20
44.85 ± 2.28
Alfven Speed [km/s]
43.83 ± 2.43
76.68 ± 8.44

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

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.701 ± 0.333 -0.125 ± 0.296 -0.702 ± 0.554 -44.57 ± 27.26 190.08 ± 23.72
VC -0.878 ± 0.036 -0.298 ± 0.091 0.375 ± 0.357 22.05 ± 2.90 198.75 ± 5.94
MX1 -0.955 ± 0.320 0.091 ± 0.833 0.281 ± 0.274 16.33 ± 63.49 174.56 ± 49.90
MX2 -0.966 ± 0.025 -0.017 ± 0.056 0.257 ± 0.251 14.87 ± 5.58 181.03 ± 3.32
MX3 -0.935 ± 0.029 -0.001 ± 0.051 0.356 ± 0.340 20.84 ± 4.69 180.04 ± 3.12
RH08 -0.975 ± 0.003 0.164 ± 0.012 0.151 ± 0.150 8.68 ± 0.63 170.47 ± 0.69
RH09 -0.973 ± 0.016 0.199 ± 0.067 0.117 ± 0.117 6.74 ± 3.98 168.47 ± 3.92
RH10 -0.973 ± 0.016 0.199 ± 0.068 0.117 ± 0.117 6.74 ± 4.01 168.47 ± 3.98
Average -0.920 0.026 0.119 6.458 178.985
Median -0.955 0.091 0.257 14.865 180.037
Deviation 0.094 0.174 0.347 21.472 10.906

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 23.2 ± 18.6 320.6 ± 5.6 2.57 ± 0.27
VC 75.8 ± 13.2 495.2 ± 9.2 2.57 ± 0.27
MX1 73.4 ± 5.1 520.7 ± 9.3 2.57 ± 0.27
MX2 70.9 ± 7.5 527.0 ± 9.3 2.57 ± 0.27
MX3 76.3 ± 6.6 517.4 ± 9.5 2.57 ± 0.27
RH08 68.0 ± 4.2 520.1 ± 9.0 2.57 ± 0.27
RH09 67.0 ± 3.8 516.0 ± 8.9 2.57 ± 0.27
RH10 67.0 ± 3.8 516.0 ± 8.9 2.57 ± 0.27
Average 65.2 491.6 2.57
Median 70.9 517.4 2.57
Deviation 17.4 69.7 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 56.2 ± 3.1 32.4 ± 1.4 40.3 ± 2.2 49.9 ± 2.1 1.74 ± 0.11 1.13 ± 0.07
VC 144.9 ± 4.5 7.3 ± 0.3 10.8 ± 0.6 59.1 ± 2.4 19.80 ± 1.13 2.46 ± 0.14
MX1 131.5 ± 3.0 8.5 ± 0.4 12.5 ± 0.7 58.9 ± 2.4 15.47 ± 0.75 2.24 ± 0.11
MX2 136.5 ± 3.1 9.8 ± 0.4 14.4 ± 0.8 58.7 ± 2.4 13.92 ± 0.69 2.33 ± 0.11
MX3 137.4 ± 3.0 7.1 ± 0.3 10.4 ± 0.6 59.1 ± 2.4 19.47 ± 0.97 2.33 ± 0.11
RH8 123.6 ± 3.2 11.3 ± 0.5 16.4 ± 0.9 58.4 ± 2.4 10.97 ± 0.54 2.12 ± 0.10
RH9 120.1 ± 3.4 11.8 ± 0.5 17.2 ± 1.0 58.3 ± 2.4 10.18 ± 0.50 2.06 ± 0.10
RH10 120.1 ± 3.4 11.8 ± 0.5 17.2 ± 1.0 58.3 ± 2.4 10.18 ± 0.50 2.06 ± 0.10
Average 121.3 12.5 17.4 57.6 12.7 2.1
Median 131.5 11.3 16.4 58.7 13.9 2.2
Deviation 27.8 8.3 9.6 3.1 5.9 0.4

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 22.0 ± 3.3 39.6 ± 1.7 70.5 ± 7.8 79.6 ± 7.5 0.55 ± 0.08 0.28 ± 0.03
VC 56.4 ± 3.3 9.5 ± 0.4 18.9 ± 2.1 88.5 ± 6.6 5.93 ± 0.50 0.64 ± 0.08
MX1 50.5 ± 2.8 11.1 ± 0.5 21.9 ± 2.4 88.3 ± 6.7 4.57 ± 0.35 0.58 ± 0.06
MX2 52.5 ± 2.9 12.7 ± 0.5 25.1 ± 2.8 88.1 ± 6.7 4.13 ± 0.31 0.60 ± 0.07
MX3 53.0 ± 3.0 9.2 ± 0.4 18.2 ± 2.0 88.5 ± 6.6 5.78 ± 0.46 0.60 ± 0.07
RH8 47.3 ± 2.6 14.6 ± 0.6 28.7 ± 3.2 87.8 ± 6.7 3.24 ± 0.22 0.54 ± 0.06
RH9 46.0 ± 2.5 15.3 ± 0.6 30.0 ± 3.3 87.7 ± 6.7 3.01 ± 0.20 0.53 ± 0.05
RH10 46.0 ± 2.5 15.3 ± 0.6 30.0 ± 3.3 87.7 ± 6.7 3.01 ± 0.20 0.53 ± 0.05
Average 46.7 15.9 30.4 87.0 3.8 0.5
Median 50.5 14.6 28.7 88.1 4.1 0.6
Deviation 10.7 9.9 16.9 3.0 1.7 0.1

Survey interval (About, Top)
Survey of solar wind interval
Selected data (About, Top)
Key plasma parameters
Survey
Velocity
V

Magnetic Field
B


Simple Methods (About, Top)
Simple methods
Rankine Chi^2 Contour (About, Top)

Chisq


Shock Speed (About, Top)
Shock Speed

Theta Bn (About, Top)
Theta Bn

Mach Numbers (About, Top)

Upstream wave speeds
Upstream Mach numbers
Downsteam wave speeds
Downstream mach numbers
Page updated Fri Jun 13 11:06:02 2014
Michael L Stevens (mstevens@cfa.harvard.edu)

   
 

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