Database: Ace Shock Analysis
Event ID: 19981761543
Observation time: 06/25/1998 176.65498 1543 [UT]
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General
Information (About, Top)
Year |
1998 |
Fractional day of year |
176.654977 |
Arrival time of shock [seconds of day] |
56590.0 ± 16.0 |
Shock type |
FF |
Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.036 |
Y GSE location of spacecraft [Re] |
0.005 |
Z GSE location of spacecraft [Re] |
-0.001 |
Upstream plasma points selected for analysis |
0009 |
Upstream field points selected for analysis |
0042 |
Downstream plasma points selected for analysis |
0009
|
Downstream field points selected for analysis |
0035 |
Minimum chisq/dof for RH8,RH9,RH10 |
17.75, 22.16, 23.93 |
Event added to database
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Sat Apr 30 21:42:38 2005
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Event last processed
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Wed Oct 15 14:23:15 2014
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Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.008 ± 0.000
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Asymptotic
plasma
parameters (About, Top)
Parameter
|
Upstream
|
Downstream
|
Vx GSE [km/s] |
-395.7 ± 1.3 |
-417.8 ± 4.8 |
Vy GSE [km/s] |
-11.8 ± 1.9 |
-35.2 ± 4.7 |
Vz GSE [km/s] |
-12.2 ± 1.2 |
-13.5 ± 2.5 |
Wi [km/s] |
12.7 ± 1.0 |
19.4 ± 0.9 |
We [km/s] |
400.9 ± 31.1 |
615.0 ± 29.9 |
Ni [n/cc] |
13.1 ± 1.1 |
22.6 ± 1.7 |
Bx GSE [nT] |
-5.6 ± 0.3 |
-0.8 ± 0.8 |
By GSE [nT] |
0.0 ± 0.4 |
-4.4 ± 0.7 |
Bz GSE [nT] |
9.1 ± 0.2 |
14.9 ± 0.4 |
Plasma Beta
|
0.039 ± 0.039
|
0.074 ± 0.081
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Sound Speed [km/s]
|
16.37 ± 1.27
|
24.91 ± 1.10
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Alfven Speed [km/s]
|
64.03 ± 2.59
|
71.20 ± 2.98
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Best values of
shock
front normal for each method (About, Top)
Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
MC |
-0.709 ± 0.063 |
0.148 ± 0.042 |
0.689 ± 0.551 |
43.57 ± 5.34 |
168.24 ± 3.24 |
VC |
-0.688 ± 0.135 |
-0.725 ± 0.129 |
-0.040 ± 0.040 |
-2.31 ± 4.69 |
226.50 ± 10.70 |
MX1 |
-0.810 ± 0.342 |
-0.579 ± 0.477 |
0.099 ± 0.098 |
5.67 ± 23.92 |
215.55 ± 33.71 |
MX2 |
-0.685 ± 0.115 |
-0.728 ± 0.108 |
-0.011 ± 0.011 |
-0.65 ± 10.91 |
226.75 ± 9.07 |
MX3 |
-0.677 ± 0.071 |
-0.736 ± 0.066 |
-0.011 ± 0.011 |
-0.65 ± 6.52 |
227.38 ± 5.55 |
RH08 |
-0.564 ± 0.012 |
-0.825 ± 0.008 |
-0.028 ± 0.028 |
-1.60 ± 0.73 |
235.65 ± 0.84 |
RH09 |
-0.606 ± 0.050 |
-0.795 ± 0.038 |
0.028 ± 0.028 |
1.60 ± 3.60 |
232.65 ± 3.58 |
RH10 |
-0.606 ± 0.051 |
-0.795 ± 0.039 |
0.028 ± 0.028 |
1.60 ± 3.76 |
232.65 ± 3.66 |
Average |
-0.668 |
-0.629 |
0.094 |
5.903 |
220.673 |
Median |
-0.677 |
-0.728 |
0.028 |
1.601 |
227.384 |
Deviation |
0.076 |
0.323 |
0.244 |
15.424 |
22.047 |
Key shock
parameters (About, Top)
Method |
ThetaBn |
Shock Speed |
Compression |
MC |
16.6 ± 2.5 |
298.4 ± 10.0 |
1.74 ± 0.25 |
VC |
71.2 ± 1.2 |
357.1 ± 18.0 |
1.74 ± 0.25 |
MX1 |
59.7 ± 1.2 |
400.3 ± 16.3 |
1.74 ± 0.25 |
MX2 |
69.8 ± 1.2 |
355.7 ± 18.0 |
1.74 ± 0.25 |
MX3 |
70.1 ± 1.2 |
352.5 ± 18.1 |
1.74 ± 0.25 |
RH08 |
74.5 ± 1.4 |
307.2 ± 19.1 |
1.74 ± 0.25 |
RH09 |
70.3 ± 1.4 |
323.5 ± 18.7 |
1.74 ± 0.25 |
RH10 |
70.3 ± 1.4 |
323.5 ± 18.7 |
1.74 ± 0.25 |
Average |
62.8 |
339.8 |
1.74 |
Median |
70.3 |
352.5 |
1.74 |
Deviation |
19.2 |
33.1 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
MC |
27.8 ± 1.4 |
15.6 ± 1.2 |
61.4 ± 2.5 |
64.2 ± 2.6 |
1.79 ± 0.18 |
0.43 ± 0.04 |
VC |
75.8 ± 1.1 |
5.1 ± 0.4 |
20.6 ± 0.8 |
65.9 ± 2.6 |
14.88 ± 1.14 |
1.15 ± 0.06 |
MX1 |
74.2 ± 1.0 |
8.1 ± 0.6 |
32.3 ± 1.3 |
65.6 ± 2.6 |
9.26 ± 0.72 |
1.13 ± 0.06 |
MX2 |
75.7 ± 1.1 |
5.5 ± 0.4 |
22.1 ± 0.9 |
65.9 ± 2.6 |
13.85 ± 1.06 |
1.15 ± 0.06 |
MX3 |
75.7 ± 1.1 |
5.4 ± 0.4 |
21.8 ± 0.9 |
65.9 ± 2.6 |
14.01 ± 1.08 |
1.15 ± 0.06 |
RH8 |
73.9 ± 1.2 |
4.3 ± 0.3 |
17.1 ± 0.7 |
66.0 ± 2.6 |
17.46 ± 1.35 |
1.12 ± 0.06 |
RH9 |
74.4 ± 1.2 |
5.4 ± 0.4 |
21.6 ± 0.9 |
65.9 ± 2.6 |
13.93 ± 1.08 |
1.13 ± 0.06 |
RH10 |
74.4 ± 1.2 |
5.4 ± 0.4 |
21.6 ± 0.9 |
65.9 ± 2.6 |
13.93 ± 1.08 |
1.13 ± 0.06 |
Average |
69.0 |
6.8 |
27.3 |
65.6 |
12.4 |
1.1 |
Median |
74.4 |
5.4 |
21.8 |
65.9 |
13.9 |
1.1 |
Deviation |
16.7 |
3.7 |
14.4 |
0.6 |
4.8 |
0.2 |
Downstream wave speeds
and
mach numbers (About, Top)
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
MC |
17.1 ± 3.8 |
23.7 ± 1.0 |
68.2 ± 2.9 |
71.6 ± 2.9 |
0.72 ± 0.18 |
0.24 ± 0.05 |
VC |
43.2 ± 2.4 |
7.6 ± 0.3 |
22.9 ± 1.0 |
75.1 ± 2.6 |
5.69 ± 0.37 |
0.58 ± 0.04 |
MX1 |
42.8 ± 2.8 |
12.0 ± 0.5 |
35.9 ± 1.5 |
74.5 ± 2.6 |
3.56 ± 0.28 |
0.57 ± 0.05 |
MX2 |
43.2 ± 2.4 |
8.2 ± 0.3 |
24.6 ± 1.0 |
75.0 ± 2.6 |
5.29 ± 0.35 |
0.58 ± 0.04 |
MX3 |
43.1 ± 2.4 |
8.1 ± 0.3 |
24.3 ± 1.0 |
75.0 ± 2.6 |
5.35 ± 0.35 |
0.58 ± 0.04 |
RH8 |
41.6 ± 2.4 |
6.3 ± 0.2 |
19.1 ± 0.8 |
75.2 ± 2.6 |
6.59 ± 0.44 |
0.55 ± 0.04 |
RH9 |
42.0 ± 2.5 |
8.0 ± 0.3 |
24.0 ± 1.0 |
75.0 ± 2.6 |
5.27 ± 0.36 |
0.56 ± 0.04 |
RH10 |
42.0 ± 2.5 |
8.0 ± 0.3 |
24.0 ± 1.0 |
75.0 ± 2.6 |
5.27 ± 0.36 |
0.56 ± 0.04 |
Average |
39.4 |
10.2 |
30.4 |
74.5 |
4.7 |
0.5 |
Median |
42.8 |
8.1 |
24.3 |
75.0 |
5.3 |
0.6 |
Deviation |
9.0 |
5.7 |
16.0 |
1.2 |
1.8 |
0.1 |
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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