CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Ace Shock Analysis
Event ID: 20021412059
Observation time: 05/21/2002 141.87461 2059 [UT]

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


General Information (About, Top)

Year 2002
Fractional day of year 141.874606
Arrival time of shock [seconds of day] 75566.0 ± 16.0
Shock type FF
Electron data availability 0
X GSE location of spacecraft [Re] 0.037
Y GSE location of spacecraft [Re] 0.006
Z GSE location of spacecraft [Re] -0.002
Upstream plasma points selected for analysis 0007
Upstream field points selected for analysis 0028
Downstream plasma points selected for analysis 0008
Downstream field points selected for analysis 0031
Minimum chisq/dof for RH8,RH9,RH10 3.39, 3.47, 3.55
Event added to database
Sun May 1 22:19:44 2005
Event last processed
Tue May 3 14:25:17 2005
Method selected
RH08
Propagation delay to Earth [minutes]
0.008 ± 0.069

Asymptotic plasma parameters (About, Top)

Parameter
Upstream
Downstream
Vx GSE [km/s] -362.2 ± 1.3 -396.8 ± 1.2
Vy GSE [km/s] 2.6 ± 2.0 -16.6 ± 5.0
Vz GSE [km/s] -42.3 ± 1.5 -28.9 ± 3.8
Wi [km/s] 16.0 ± 0.8 31.1 ± 0.8
We [km/s] 504.8 ± 25.0 984.9 ± 25.4
Ni [n/cc] 16.4 ± 0.8 18.3 ± 1.9
Bx GSE [nT] -0.4 ± 0.3 -3.1 ± 0.6
By GSE [nT] 0.4 ± 0.6 4.8 ± 0.5
Bz GSE [nT] 3.6 ± 0.1 7.5 ± 1.9
Plasma Beta
0.638 ± 0.660
0.452 ± 0.441
Sound Speed [km/s]
20.61 ± 1.02
40.21 ± 1.04
Alfven Speed [km/s]
20.01 ± 0.19
49.06 ± 9.64

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

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.714 ± 0.767 -0.659 ± 0.827 0.236 ± 0.232 13.67 ± 52.40 222.70 ± 65.29
VC -0.831 ± 0.060 -0.456 ± 0.101 0.319 ± 0.308 18.62 ± 5.24 208.74 ± 6.88
MX1 -0.840 ± 0.063 -0.541 ± 0.097 -0.032 ± 0.032 -1.82 ± 20.31 212.78 ± 6.63
MX2 -0.791 ± 0.054 -0.596 ± 0.069 0.142 ± 0.141 8.18 ± 8.90 217.00 ± 4.90
MX3 -0.768 ± 0.056 -0.613 ± 0.068 0.186 ± 0.184 10.71 ± 7.73 218.62 ± 4.95
RH08 -0.551 ± 0.011 0.380 ± 0.012 -0.743 ± 0.561 -47.99 ± 0.80 145.40 ± 1.04
RH09 -0.551 ± 0.015 0.380 ± 0.017 -0.743 ± 0.561 -47.99 ± 1.01 145.40 ± 1.59
RH10 -0.551 ± 0.020 0.380 ± 0.022 -0.743 ± 0.561 -47.99 ± 1.46 145.40 ± 1.96
Average -0.700 -0.216 -0.172 -11.825 189.506
Median -0.714 -0.456 0.142 8.181 212.782
Deviation 0.129 0.497 0.483 30.493 36.746

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 76.2 ± 9.4 517.0 ± 2687.5 1.09 ± 0.09
VC 69.0 ± 8.5 560.8 ± 2798.5 1.09 ± 0.09
MX1 89.7 ± 8.5 562.3 ± 2533.2 1.09 ± 0.09
MX2 80.6 ± 9.0 544.8 ± 2679.7 1.09 ± 0.09
MX3 78.4 ± 9.1 538.0 ± 2697.6 1.09 ± 0.09
RH08 52.3 ± 3.9 241.8 ± 126.5 1.09 ± 0.09
RH09 52.3 ± 3.9 241.8 ± 126.5 1.09 ± 0.09
RH10 52.3 ± 3.9 241.8 ± 126.5 1.09 ± 0.09
Average 68.9 431.0 1.09
Median 76.2 538.0 1.09
Deviation 14.8 157.3 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 270.0 ± 1.1 3.4 ± 0.1 4.8 ± 0.0 28.5 ± 0.7 78.44 ± 1.65 9.47 ± 0.21
VC 274.5 ± 0.9 5.2 ± 0.1 7.2 ± 0.1 28.3 ± 0.7 52.55 ± 1.15 9.72 ± 0.22
MX1 258.0 ± 1.4 0.1 ± 0.0 0.1 ± 0.0 28.7 ± 0.7 3791.30 ± 79.39 8.98 ± 0.20
MX2 266.0 ± 1.2 2.3 ± 0.1 3.3 ± 0.0 28.6 ± 0.7 113.55 ± 2.39 9.29 ± 0.21
MX3 269.4 ± 1.2 2.9 ± 0.1 4.0 ± 0.0 28.6 ± 0.7 93.16 ± 1.97 9.43 ± 0.21
RH8 9.8 ± 1.6 9.3 ± 0.2 12.2 ± 0.1 27.2 ± 0.7 1.06 ± 0.18 0.36 ± 0.06
RH9 9.8 ± 1.6 9.3 ± 0.2 12.2 ± 0.1 27.2 ± 0.7 1.06 ± 0.18 0.36 ± 0.06
RH10 9.8 ± 1.6 9.3 ± 0.2 12.2 ± 0.1 27.2 ± 0.7 1.06 ± 0.18 0.36 ± 0.06
Average 170.9 5.2 7.0 28.0 516.5 6.0
Median 266.0 5.2 7.2 28.5 78.4 9.3
Deviation 133.5 3.6 4.7 0.7 1324.0 4.7

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 229.5 ± 3.1 7.4 ± 0.6 11.7 ± 2.3 63.3 ± 7.2 31.35 ± 2.49 3.66 ± 0.40
VC 232.7 ± 2.4 11.2 ± 0.9 17.6 ± 3.5 62.7 ± 7.1 20.97 ± 1.72 3.75 ± 0.42
MX1 218.9 ± 2.5 0.1 ± 0.0 0.2 ± 0.0 63.7 ± 7.2 1512.36 ± 117.64 3.47 ± 0.37
MX2 225.3 ± 2.8 5.0 ± 0.4 8.0 ± 1.6 63.5 ± 7.2 45.22 ± 3.58 3.58 ± 0.39
MX3 228.6 ± 2.9 6.2 ± 0.5 9.8 ± 1.9 63.4 ± 7.2 37.17 ± 2.95 3.64 ± 0.39
RH8 8.0 ± 3.2 19.7 ± 1.5 30.0 ± 5.9 60.6 ± 7.1 0.41 ± 0.16 0.13 ± 0.06
RH9 8.0 ± 3.2 19.7 ± 1.5 30.0 ± 5.9 60.6 ± 7.1 0.41 ± 0.16 0.13 ± 0.06
RH10 8.0 ± 3.2 19.7 ± 1.5 30.0 ± 5.9 60.6 ± 7.1 0.41 ± 0.16 0.13 ± 0.06
Average 144.9 11.1 17.2 62.3 206.0 2.3
Median 225.3 11.2 17.6 63.3 31.4 3.6
Deviation 113.4 7.7 11.6 1.5 528.1 1.8

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 Mon Apr 13 08:55:21 2009
Michael L Stevens (mstevens@cfa.harvard.edu)

   
 

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