Database: Ace Shock Analysis
Event ID: 19982120915
Observation time: 07/31/1998 212.38550 0915 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
212.385498 |
| Arrival time of shock [seconds of day] |
33307.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.038 |
| Y GSE location of spacecraft [Re] |
0.005 |
| Z GSE location of spacecraft [Re] |
0.003 |
| Upstream plasma points selected for analysis |
0010 |
| Upstream field points selected for analysis |
0039 |
| Downstream plasma points selected for analysis |
0008
|
| Downstream field points selected for analysis |
0033 |
| Minimum chisq/dof for RH8,RH9,RH10 |
5.87, 28.82, 29.54 |
Event added to database
|
Sat Apr 30 21:42:48 2005
|
Event last processed
|
Wed Oct 15 14:28:35 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.009 ± 0.001
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-410.8 ± 1.8 |
-436.3 ± 3.1 |
| Vy GSE [km/s] |
8.4 ± 1.9 |
2.4 ± 1.0 |
| Vz GSE [km/s] |
2.0 ± 1.6 |
-33.6 ± 3.2 |
| Wi [km/s] |
12.1 ± 0.6 |
12.5 ± 0.6 |
| We [km/s] |
384.1 ± 20.0 |
393.9 ± 19.3 |
| Ni [n/cc] |
6.2 ± 0.7 |
10.1 ± 1.0 |
| Bx GSE [nT] |
1.0 ± 0.2 |
3.4 ± 0.7 |
| By GSE [nT] |
8.4 ± 0.2 |
12.8 ± 0.4 |
| Bz GSE [nT] |
-3.1 ± 0.3 |
-5.4 ± 0.5 |
Plasma Beta
|
0.024 ± 0.024
|
0.016 ± 0.017
|
Sound Speed [km/s]
|
15.68 ± 0.82
|
16.09 ± 0.79
|
Alfven Speed [km/s]
|
79.40 ± 4.84
|
98.23 ± 5.48
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.814 ± 0.114 |
0.570 ± 0.159 |
0.108 ± 0.108 |
6.22 ± 17.60 |
145.00 ± 11.12 |
| VC |
-0.577 ± 0.046 |
-0.138 ± 0.042 |
-0.805 ± 0.555 |
-53.61 ± 3.31 |
193.41 ± 4.08 |
| MX1 |
-0.587 ± 0.063 |
-0.125 ± 0.148 |
-0.800 ± 0.556 |
-53.13 ± 4.00 |
192.06 ± 14.40 |
| MX2 |
-0.586 ± 0.071 |
-0.121 ± 0.134 |
-0.801 ± 0.556 |
-53.27 ± 4.79 |
191.71 ± 13.01 |
| MX3 |
-0.585 ± 0.085 |
-0.117 ± 0.114 |
-0.803 ± 0.556 |
-53.39 ± 5.95 |
191.28 ± 11.09 |
| RH08 |
-0.742 ± 0.007 |
0.531 ± 0.008 |
0.408 ± 0.384 |
24.07 ± 0.70 |
144.40 ± 0.58 |
| RH09 |
-0.910 ± 0.029 |
0.202 ± 0.068 |
-0.363 ± 0.346 |
-21.29 ± 4.04 |
167.47 ± 4.30 |
| RH10 |
-0.918 ± 0.028 |
0.204 ± 0.069 |
-0.341 ± 0.327 |
-19.92 ± 4.02 |
167.47 ± 4.29 |
| Average |
-0.715 |
0.126 |
-0.425 |
-28.040 |
174.099 |
| Median |
-0.587 |
0.202 |
-0.363 |
-21.292 |
191.279 |
| Deviation |
0.151 |
0.299 |
0.472 |
30.620 |
21.102 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
66.4 ± 1.9 |
374.0 ± 1.4 |
1.67 ± 0.34 |
| VC |
84.8 ± 1.2 |
346.4 ± 5.3 |
1.67 ± 0.34 |
| MX1 |
84.4 ± 1.2 |
350.5 ± 5.3 |
1.67 ± 0.34 |
| MX2 |
84.1 ± 1.2 |
350.1 ± 5.3 |
1.67 ± 0.34 |
| MX3 |
83.8 ± 1.2 |
349.8 ± 5.3 |
1.67 ± 0.34 |
| RH08 |
74.5 ± 2.3 |
313.0 ± 0.6 |
1.67 ± 0.34 |
| RH09 |
77.7 ± 0.7 |
465.3 ± 4.0 |
1.67 ± 0.34 |
| RH10 |
78.1 ± 0.8 |
467.1 ± 35.0 |
1.67 ± 0.34 |
| Average |
79.2 |
377.0 |
1.67 |
| Median |
83.8 |
350.5 |
1.67 |
| Deviation |
6.5 |
57.5 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
34.6 ± 1.7 |
6.2 ± 0.3 |
31.8 ± 1.9 |
80.7 ± 4.8 |
5.60 ± 0.29 |
0.43 ± 0.03 |
| VC |
112.1 ± 1.6 |
1.4 ± 0.1 |
7.1 ± 0.4 |
80.9 ± 4.8 |
81.31 ± 3.96 |
1.39 ± 0.08 |
| MX1 |
112.2 ± 1.6 |
1.5 ± 0.1 |
7.8 ± 0.5 |
80.9 ± 4.8 |
74.32 ± 3.61 |
1.39 ± 0.08 |
| MX2 |
112.1 ± 1.6 |
1.6 ± 0.1 |
8.2 ± 0.5 |
80.9 ± 4.8 |
71.14 ± 3.45 |
1.39 ± 0.08 |
| MX3 |
112.1 ± 1.6 |
1.7 ± 0.1 |
8.5 ± 0.5 |
80.9 ± 4.8 |
67.89 ± 3.29 |
1.39 ± 0.08 |
| RH8 |
2.8 ± 1.9 |
4.1 ± 0.2 |
21.3 ± 1.3 |
80.8 ± 4.8 |
0.66 ± 0.46 |
0.03 ± 0.02 |
| RH9 |
90.8 ± 1.4 |
3.3 ± 0.2 |
16.9 ± 1.0 |
80.9 ± 4.8 |
27.69 ± 1.22 |
1.13 ± 0.06 |
| RH10 |
89.1 ± 1.4 |
3.2 ± 0.2 |
16.4 ± 1.0 |
80.9 ± 4.8 |
28.11 ± 1.24 |
1.10 ± 0.06 |
| Average |
83.2 |
2.9 |
14.8 |
80.9 |
44.6 |
1.0 |
| Median |
112.1 |
3.2 |
16.4 |
80.9 |
67.9 |
1.4 |
| Deviation |
41.9 |
1.7 |
8.7 |
0.1 |
32.7 |
0.5 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
21.1 ± 2.0 |
6.4 ± 0.3 |
39.4 ± 2.2 |
99.3 ± 5.4 |
3.33 ± 0.41 |
0.21 ± 0.02 |
| VC |
67.9 ± 4.2 |
1.4 ± 0.1 |
8.8 ± 0.5 |
99.5 ± 5.4 |
47.78 ± 4.89 |
0.68 ± 0.05 |
| MX1 |
67.9 ± 4.2 |
1.6 ± 0.1 |
9.7 ± 0.5 |
99.5 ± 5.4 |
43.69 ± 4.47 |
0.68 ± 0.05 |
| MX2 |
67.9 ± 4.2 |
1.6 ± 0.1 |
10.1 ± 0.6 |
99.5 ± 5.4 |
41.81 ± 4.27 |
0.68 ± 0.05 |
| MX3 |
67.9 ± 4.2 |
1.7 ± 0.1 |
10.6 ± 0.6 |
99.5 ± 5.4 |
39.91 ± 4.08 |
0.68 ± 0.05 |
| RH8 |
1.6 ± 1.7 |
4.3 ± 0.2 |
26.3 ± 1.5 |
99.5 ± 5.4 |
0.37 ± 0.39 |
0.02 ± 0.02 |
| RH9 |
55.9 ± 3.6 |
3.4 ± 0.2 |
21.0 ± 1.2 |
99.5 ± 5.4 |
16.54 ± 1.70 |
0.56 ± 0.04 |
| RH10 |
54.8 ± 3.6 |
3.3 ± 0.2 |
20.3 ± 1.1 |
99.5 ± 5.4 |
16.78 ± 1.73 |
0.55 ± 0.04 |
| Average |
50.6 |
3.0 |
18.3 |
99.5 |
26.3 |
0.5 |
| Median |
67.9 |
3.3 |
20.3 |
99.5 |
39.9 |
0.7 |
| Deviation |
25.4 |
1.7 |
10.8 |
0.1 |
19.2 |
0.3 |
Survey interval (About, Top)
Selected
data (About, Top)
|
Key plasma parameters
|
Velocity
|
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)
| 
