Database: Ace Shock Analysis
Event ID: 19983120421
Observation time: 11/08/1998 312.18146 0421 [UT]
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General
Information (About, Top)
Year |
1998 |
Fractional day of year |
312.181458 |
Arrival time of shock [seconds of day] |
15678.0 ± 16.0 |
Shock type |
FF |
Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.035 |
Y GSE location of spacecraft [Re] |
-0.004 |
Z GSE location of spacecraft [Re] |
-0.003 |
Upstream plasma points selected for analysis |
0009 |
Upstream field points selected for analysis |
0037 |
Downstream plasma points selected for analysis |
0011
|
Downstream field points selected for analysis |
0044 |
Minimum chisq/dof for RH8,RH9,RH10 |
13.82, 18.43, 19.34 |
Event added to database
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Sat Apr 30 21:43:26 2005
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Event last processed
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Wed Oct 15 14:43:33 2014
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Method selected
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RH08
|
Propagation delay to Earth [minutes]
|
0.005 ± 0.001
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Asymptotic
plasma
parameters (About, Top)
Parameter
|
Upstream
|
Downstream
|
Vx GSE [km/s] |
-457.8 ± 12.8 |
-602.4 ± 9.3 |
Vy GSE [km/s] |
10.0 ± 4.9 |
29.6 ± 10.3 |
Vz GSE [km/s] |
5.5 ± 11.0 |
-27.3 ± 14.6 |
Wi [km/s] |
27.0 ± 5.1 |
56.9 ± 4.4 |
We [km/s] |
854.2 ± 161.9 |
1798.0 ± 140.0 |
Ni [n/cc] |
5.3 ± 0.6 |
11.8 ± 2.4 |
Bx GSE [nT] |
-2.4 ± 1.9 |
8.6 ± 1.2 |
By GSE [nT] |
16.0 ± 0.4 |
28.1 ± 1.4 |
Bz GSE [nT] |
-5.7 ± 1.1 |
-15.6 ± 2.4 |
Plasma Beta
|
0.025 ± 0.026
|
0.073 ± 0.076
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Sound Speed [km/s]
|
32.91 ± 3.35
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73.33 ± 5.65
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Alfven Speed [km/s]
|
162.84 ± 10.79
|
212.27 ± 22.86
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Best values of
shock
front normal for each method (About, Top)
Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
MC |
-0.721 ± 0.090 |
0.693 ± 0.094 |
0.005 ± 0.005 |
0.29 ± 8.11 |
136.15 ± 7.47 |
VC |
-0.966 ± 0.028 |
0.132 ± 0.073 |
-0.221 ± 0.217 |
-12.74 ± 6.78 |
172.21 ± 4.34 |
MX1 |
-0.812 ± 0.054 |
0.496 ± 0.083 |
-0.307 ± 0.297 |
-17.89 ± 4.81 |
148.59 ± 5.75 |
MX2 |
-0.816 ± 0.048 |
0.437 ± 0.068 |
-0.378 ± 0.359 |
-22.24 ± 5.50 |
151.85 ± 4.63 |
MX3 |
-0.814 ± 0.051 |
0.388 ± 0.063 |
-0.431 ± 0.402 |
-25.53 ± 6.32 |
154.50 ± 4.15 |
RH08 |
-0.783 ± 0.007 |
0.358 ± 0.007 |
-0.508 ± 0.459 |
-30.56 ± 0.71 |
155.43 ± 0.50 |
RH09 |
-0.777 ± 0.044 |
0.355 ± 0.064 |
-0.520 ± 0.467 |
-31.30 ± 4.01 |
155.43 ± 4.57 |
RH10 |
-0.783 ± 0.044 |
0.358 ± 0.065 |
-0.508 ± 0.459 |
-30.56 ± 4.01 |
155.43 ± 4.67 |
Average |
-0.809 |
0.402 |
-0.359 |
-21.315 |
153.700 |
Median |
-0.783 |
0.388 |
-0.378 |
-22.237 |
155.432 |
Deviation |
0.071 |
0.157 |
0.181 |
10.962 |
9.926 |
Key shock
parameters (About, Top)
Method |
ThetaBn |
Shock Speed |
Compression |
MC |
41.1 ± 7.2 |
552.6 ± 57.2 |
2.26 ± 0.65 |
VC |
70.2 ± 5.9 |
716.3 ± 64.6 |
2.26 ± 0.65 |
MX1 |
46.9 ± 5.9 |
629.9 ± 60.7 |
2.26 ± 0.65 |
MX2 |
49.4 ± 5.4 |
632.8 ± 60.5 |
2.26 ± 0.65 |
MX3 |
51.5 ± 5.1 |
632.5 ± 60.1 |
2.26 ± 0.65 |
RH08 |
52.2 ± 4.5 |
611.6 ± 58.4 |
2.26 ± 0.65 |
RH09 |
52.2 ± 4.4 |
608.1 ± 58.1 |
2.26 ± 0.65 |
RH10 |
52.2 ± 4.5 |
611.6 ± 58.4 |
2.26 ± 0.65 |
Average |
52.0 |
624.4 |
2.26 |
Median |
52.2 |
629.9 |
2.26 |
Deviation |
8.3 |
45.3 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
MC |
214.9 ± 8.6 |
24.6 ± 2.5 |
122.7 ± 8.1 |
164.3 ± 10.7 |
8.82 ± 0.93 |
1.31 ± 0.10 |
VC |
272.5 ± 10.2 |
11.0 ± 1.1 |
55.2 ± 3.7 |
165.8 ± 10.5 |
25.09 ± 2.58 |
1.65 ± 0.13 |
MX1 |
254.3 ± 8.1 |
22.2 ± 2.2 |
111.2 ± 7.4 |
164.7 ± 10.6 |
11.56 ± 1.27 |
1.55 ± 0.12 |
MX2 |
256.4 ± 7.9 |
21.1 ± 2.1 |
105.9 ± 7.0 |
164.8 ± 10.6 |
12.24 ± 1.36 |
1.56 ± 0.12 |
MX3 |
257.7 ± 7.7 |
20.2 ± 2.0 |
101.3 ± 6.7 |
164.9 ± 10.6 |
12.88 ± 1.44 |
1.57 ± 0.12 |
RH8 |
251.9 ± 7.3 |
19.9 ± 2.0 |
99.9 ± 6.6 |
165.0 ± 10.6 |
12.77 ± 1.46 |
1.53 ± 0.12 |
RH9 |
251.4 ± 7.3 |
19.9 ± 2.0 |
99.9 ± 6.6 |
165.0 ± 10.6 |
12.74 ± 1.46 |
1.53 ± 0.12 |
RH10 |
251.9 ± 7.3 |
19.9 ± 2.0 |
99.9 ± 6.6 |
165.0 ± 10.6 |
12.77 ± 1.46 |
1.53 ± 0.12 |
Average |
251.4 |
19.9 |
99.5 |
164.9 |
13.6 |
1.5 |
Median |
254.3 |
20.2 |
101.3 |
165.0 |
12.8 |
1.6 |
Deviation |
16.2 |
3.9 |
19.6 |
0.4 |
4.8 |
0.1 |
Downstream wave speeds
and
mach numbers (About, Top)
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
MC |
97.9 ± 10.3 |
53.8 ± 4.2 |
160.0 ± 17.2 |
218.1 ± 22.9 |
1.83 ± 0.21 |
0.45 ± 0.07 |
VC |
124.3 ± 10.2 |
23.6 ± 1.8 |
71.9 ± 7.7 |
223.4 ± 23.0 |
5.28 ± 0.40 |
0.56 ± 0.06 |
MX1 |
117.8 ± 10.1 |
48.4 ± 3.7 |
144.9 ± 15.6 |
219.3 ± 22.9 |
2.44 ± 0.18 |
0.54 ± 0.06 |
MX2 |
118.2 ± 10.4 |
46.0 ± 3.6 |
138.1 ± 14.9 |
219.8 ± 22.9 |
2.57 ± 0.19 |
0.54 ± 0.06 |
MX3 |
118.9 ± 10.7 |
43.9 ± 3.4 |
132.0 ± 14.2 |
220.3 ± 22.9 |
2.71 ± 0.19 |
0.54 ± 0.05 |
RH8 |
115.6 ± 11.1 |
43.3 ± 3.4 |
130.2 ± 14.0 |
220.4 ± 22.9 |
2.67 ± 0.19 |
0.53 ± 0.05 |
RH9 |
115.6 ± 11.2 |
43.3 ± 3.4 |
130.2 ± 14.0 |
220.4 ± 22.9 |
2.67 ± 0.19 |
0.53 ± 0.05 |
RH10 |
115.6 ± 11.1 |
43.3 ± 3.4 |
130.2 ± 14.0 |
220.4 ± 22.9 |
2.67 ± 0.19 |
0.53 ± 0.05 |
Average |
115.5 |
43.2 |
129.7 |
220.3 |
2.9 |
0.5 |
Median |
117.8 |
43.9 |
132.0 |
220.4 |
2.7 |
0.5 |
Deviation |
7.7 |
8.7 |
25.5 |
1.5 |
1.0 |
0.0 |
Survey interval (About, Top)
Selected
data (About, Top)
Key plasma parameters
|
Velocity
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Magnetic Field
|
Simple
Methods
(About, Top)
Rankine Chi^2
Contour (About, Top)
Shock
Speed (About, Top)
Theta Bn (About, Top)
Mach Numbers (About, Top)
Page updated Mon Apr 13 08:55:21 2009
Michael L Stevens
(mstevens@cfa.harvard.edu)
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