Database: Ace Shock Analysis
Event ID: 19981641855
Observation time: 06/13/1998 164.78869 1855 [UT]
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General
Information (About, Top)
Year |
1998 |
Fractional day of year |
164.788692 |
Arrival time of shock [seconds of day] |
68143.0 ± 16.0 |
Shock type |
FF |
Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.035 |
Y GSE location of spacecraft [Re] |
0.003 |
Z GSE location of spacecraft [Re] |
-0.003 |
Upstream plasma points selected for analysis |
0010 |
Upstream field points selected for analysis |
0042 |
Downstream plasma points selected for analysis |
0009
|
Downstream field points selected for analysis |
0038 |
Minimum chisq/dof for RH8,RH9,RH10 |
13.61, 16.39, 16.75 |
Event added to database
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Sat Apr 30 21:42:35 2005
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Event last processed
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Wed Oct 15 14:23:05 2014
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Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.009 ± 0.000
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Asymptotic
plasma
parameters (About, Top)
Parameter
|
Upstream
|
Downstream
|
Vx GSE [km/s] |
-307.5 ± 5.7 |
-377.4 ± 5.4 |
Vy GSE [km/s] |
-6.2 ± 2.2 |
27.6 ± 2.1 |
Vz GSE [km/s] |
4.4 ± 5.6 |
-44.2 ± 4.5 |
Wi [km/s] |
19.7 ± 3.4 |
31.7 ± 5.7 |
We [km/s] |
622.1 ± 107.5 |
1003.9 ± 181.8 |
Ni [n/cc] |
3.9 ± 0.7 |
17.2 ± 2.5 |
Bx GSE [nT] |
-0.9 ± 0.4 |
1.0 ± 1.3 |
By GSE [nT] |
3.7 ± 0.1 |
6.8 ± 0.6 |
Bz GSE [nT] |
1.1 ± 0.5 |
6.8 ± 0.3 |
Plasma Beta
|
0.204 ± 0.167
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0.392 ± 0.303
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Sound Speed [km/s]
|
24.94 ± 4.41
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40.98 ± 7.42
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Alfven Speed [km/s]
|
45.46 ± 4.97
|
51.88 ± 3.48
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Best values of
shock
front normal for each method (About, Top)
Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
MC |
-0.457 ± 0.157 |
0.850 ± 0.087 |
-0.263 ± 0.257 |
-15.28 ± 5.27 |
118.28 ± 10.57 |
VC |
-0.762 ± 0.042 |
0.371 ± 0.049 |
-0.531 ± 0.474 |
-32.07 ± 4.34 |
154.02 ± 3.41 |
MX1 |
-0.622 ± 0.059 |
0.755 ± 0.050 |
-0.207 ± 0.204 |
-11.96 ± 3.83 |
129.48 ± 4.46 |
MX2 |
-0.685 ± 0.070 |
0.707 ± 0.068 |
-0.175 ± 0.173 |
-10.07 ± 3.94 |
134.11 ± 5.61 |
MX3 |
-0.717 ± 0.084 |
0.680 ± 0.089 |
-0.156 ± 0.154 |
-8.96 ± 4.24 |
136.53 ± 7.09 |
RH08 |
-0.947 ± 0.004 |
0.318 ± 0.012 |
0.039 ± 0.039 |
2.24 ± 0.68 |
161.45 ± 0.71 |
RH09 |
-0.942 ± 0.023 |
0.335 ± 0.064 |
0.017 ± 0.017 |
0.96 ± 4.05 |
160.45 ± 3.91 |
RH10 |
-0.948 ± 0.022 |
0.318 ± 0.065 |
0.028 ± 0.028 |
1.60 ± 4.06 |
161.45 ± 3.91 |
Average |
-0.760 |
0.542 |
-0.156 |
-9.191 |
144.471 |
Median |
-0.717 |
0.680 |
-0.156 |
-8.958 |
154.017 |
Deviation |
0.178 |
0.226 |
0.192 |
11.458 |
16.920 |
Key shock
parameters (About, Top)
Method |
ThetaBn |
Shock Speed |
Compression |
MC |
35.5 ± 7.8 |
229.1 ± 7.1 |
4.55 ± 0.67 |
VC |
69.4 ± 7.2 |
348.8 ± 9.7 |
4.55 ± 0.67 |
MX1 |
39.3 ± 7.1 |
288.6 ± 8.1 |
4.55 ± 0.67 |
MX2 |
41.4 ± 6.7 |
309.7 ± 8.4 |
4.55 ± 0.67 |
MX3 |
42.6 ± 6.5 |
320.1 ± 8.5 |
4.55 ± 0.67 |
RH08 |
60.2 ± 4.5 |
386.9 ± 9.3 |
4.55 ± 0.67 |
RH09 |
59.6 ± 4.6 |
387.0 ± 9.3 |
4.55 ± 0.67 |
RH10 |
60.4 ± 4.5 |
387.8 ± 9.3 |
4.55 ± 0.67 |
Average |
51.1 |
332.2 |
4.55 |
Median |
59.6 |
348.8 |
4.55 |
Deviation |
12.7 |
56.8 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
MC |
95.2 ± 2.0 |
18.9 ± 2.6 |
37.0 ± 4.0 |
48.5 ± 3.5 |
5.15 ± 0.82 |
1.97 ± 0.14 |
VC |
119.3 ± 5.6 |
7.7 ± 0.9 |
16.0 ± 1.8 |
51.6 ± 2.9 |
15.82 ± 2.39 |
2.32 ± 0.14 |
MX1 |
103.0 ± 2.8 |
17.7 ± 2.4 |
35.2 ± 3.8 |
49.0 ± 3.4 |
5.91 ± 0.93 |
2.11 ± 0.15 |
MX2 |
104.1 ± 3.2 |
17.1 ± 2.3 |
34.1 ± 3.7 |
49.2 ± 3.4 |
6.19 ± 0.97 |
2.12 ± 0.14 |
MX3 |
104.5 ± 3.4 |
16.7 ± 2.2 |
33.4 ± 3.7 |
49.3 ± 3.3 |
6.35 ± 0.99 |
2.13 ± 0.14 |
RH8 |
97.1 ± 4.9 |
10.9 ± 1.3 |
22.6 ± 2.5 |
51.0 ± 3.0 |
9.01 ± 1.36 |
1.91 ± 0.13 |
RH9 |
99.0 ± 4.9 |
11.1 ± 1.3 |
23.0 ± 2.5 |
50.9 ± 3.0 |
9.02 ± 1.36 |
1.95 ± 0.13 |
RH10 |
97.9 ± 4.9 |
10.9 ± 1.3 |
22.5 ± 2.5 |
51.0 ± 3.0 |
9.14 ± 1.38 |
1.93 ± 0.13 |
Average |
102.5 |
13.9 |
28.0 |
50.1 |
8.3 |
2.1 |
Median |
103.0 |
16.7 |
33.4 |
50.9 |
9.0 |
2.1 |
Deviation |
7.6 |
4.2 |
7.8 |
1.2 |
3.4 |
0.1 |
Downstream wave speeds
and
mach numbers (About, Top)
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
MC |
21.7 ± 3.4 |
28.7 ± 3.6 |
42.2 ± 2.8 |
59.8 ± 4.2 |
0.77 ± 0.17 |
0.36 ± 0.07 |
VC |
27.6 ± 4.0 |
11.4 ± 1.3 |
18.3 ± 1.2 |
65.4 ± 5.1 |
2.47 ± 0.55 |
0.43 ± 0.08 |
MX1 |
24.0 ± 4.2 |
26.9 ± 3.3 |
40.1 ± 2.7 |
60.7 ± 4.4 |
0.91 ± 0.21 |
0.40 ± 0.08 |
MX2 |
23.9 ± 4.4 |
25.9 ± 3.1 |
38.9 ± 2.6 |
61.1 ± 4.5 |
0.94 ± 0.23 |
0.39 ± 0.08 |
MX3 |
24.0 ± 4.6 |
25.3 ± 3.1 |
38.2 ± 2.6 |
61.4 ± 4.5 |
0.96 ± 0.24 |
0.39 ± 0.08 |
RH8 |
22.4 ± 5.7 |
16.3 ± 1.9 |
25.8 ± 1.7 |
64.3 ± 5.0 |
1.40 ± 0.42 |
0.35 ± 0.10 |
RH9 |
23.0 ± 5.6 |
16.6 ± 1.9 |
26.2 ± 1.8 |
64.3 ± 5.0 |
1.41 ± 0.41 |
0.36 ± 0.10 |
RH10 |
22.7 ± 5.6 |
16.2 ± 1.9 |
25.7 ± 1.7 |
64.4 ± 5.0 |
1.42 ± 0.42 |
0.36 ± 0.10 |
Average |
23.7 |
20.9 |
31.9 |
62.7 |
1.3 |
0.4 |
Median |
23.9 |
25.3 |
38.2 |
64.3 |
1.4 |
0.4 |
Deviation |
1.8 |
6.5 |
8.9 |
2.1 |
0.5 |
0.0 |
Survey interval (About, Top)
Selected
data (About, Top)
Key plasma parameters
|
Velocity
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Magnetic Field
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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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