Database: Ace Shock Analysis
Event ID: 19981351357
Observation time: 05/15/1998 135.58152 1357 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
135.581516 |
| Arrival time of shock [seconds of day] |
50243.0 ± 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 |
0009 |
| Upstream field points selected for analysis |
0037 |
| Downstream plasma points selected for analysis |
0009
|
| Downstream field points selected for analysis |
0034 |
| Minimum chisq/dof for RH8,RH9,RH10 |
7.97, 53.88, 60.74 |
Event added to database
|
Sat Apr 30 21:42:29 2005
|
Event last processed
|
Wed Oct 15 14:20:10 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.009 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-306.5 ± 1.1 |
-350.0 ± 1.2 |
| Vy GSE [km/s] |
-24.0 ± 0.9 |
-40.8 ± 0.6 |
| Vz GSE [km/s] |
-11.0 ± 1.2 |
-9.7 ± 0.8 |
| Wi [km/s] |
18.8 ± 0.7 |
19.4 ± 0.5 |
| We [km/s] |
594.0 ± 22.6 |
614.4 ± 14.5 |
| Ni [n/cc] |
9.4 ± 0.3 |
34.7 ± 1.1 |
| Bx GSE [nT] |
0.9 ± 0.1 |
2.2 ± 0.1 |
| By GSE [nT] |
-2.7 ± 0.1 |
-5.5 ± 0.3 |
| Bz GSE [nT] |
0.2 ± 0.1 |
0.8 ± 0.2 |
Plasma Beta
|
0.902 ± 0.898
|
0.773 ± 0.809
|
Sound Speed [km/s]
|
24.25 ± 0.92
|
25.01 ± 0.60
|
Alfven Speed [km/s]
|
19.78 ± 0.42
|
22.10 ± 0.94
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.712 ± 0.240 |
-0.520 ± 0.239 |
-0.472 ± 0.433 |
-28.16 ± 29.14 |
216.15 ± 15.54 |
| VC |
-0.932 ± 0.009 |
-0.361 ± 0.022 |
0.028 ± 0.028 |
1.60 ± 1.66 |
201.20 ± 1.38 |
| MX1 |
-0.904 ± 0.017 |
-0.426 ± 0.037 |
0.033 ± 0.033 |
1.87 ± 1.70 |
205.20 ± 2.34 |
| MX2 |
-0.905 ± 0.017 |
-0.424 ± 0.036 |
0.038 ± 0.038 |
2.16 ± 1.75 |
205.13 ± 2.25 |
| MX3 |
-0.905 ± 0.016 |
-0.423 ± 0.034 |
0.042 ± 0.042 |
2.42 ± 1.87 |
205.06 ± 2.17 |
| RH08 |
-0.930 ± 0.013 |
-0.367 ± 0.032 |
0.006 ± 0.006 |
0.32 ± 2.00 |
201.56 ± 2.00 |
| RH09 |
-0.576 ± 0.045 |
-0.476 ± 0.042 |
-0.665 ± 0.543 |
-41.67 ± 4.34 |
219.61 ± 2.69 |
| RH10 |
-0.599 ± 0.048 |
-0.478 ± 0.048 |
-0.642 ± 0.535 |
-39.98 ± 4.28 |
218.61 ± 3.63 |
| Average |
-0.808 |
-0.435 |
-0.204 |
-12.681 |
209.064 |
| Median |
-0.904 |
-0.424 |
0.028 |
1.597 |
205.200 |
| Deviation |
0.154 |
0.055 |
0.327 |
20.205 |
7.720 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
74.2 ± 2.5 |
289.6 ± 1.2 |
3.69 ± 0.19 |
| VC |
83.9 ± 1.5 |
358.1 ± 1.7 |
3.69 ± 0.19 |
| MX1 |
79.9 ± 1.5 |
350.9 ± 1.7 |
3.69 ± 0.19 |
| MX2 |
80.0 ± 1.4 |
350.9 ± 1.7 |
3.69 ± 0.19 |
| MX3 |
80.0 ± 1.4 |
350.9 ± 1.7 |
3.69 ± 0.19 |
| RH08 |
83.7 ± 1.5 |
357.9 ± 1.7 |
3.69 ± 0.19 |
| RH09 |
75.6 ± 2.8 |
239.4 ± 1.1 |
3.69 ± 0.19 |
| RH10 |
75.7 ± 2.8 |
247.9 ± 1.1 |
3.69 ± 0.19 |
| Average |
79.1 |
318.2 |
3.69 |
| Median |
80.0 |
350.9 |
3.69 |
| Deviation |
3.7 |
51.2 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
53.8 ± 0.6 |
4.2 ± 0.1 |
5.4 ± 0.1 |
31.0 ± 0.9 |
12.79 ± 0.34 |
1.74 ± 0.05 |
| VC |
64.0 ± 1.2 |
1.6 ± 0.0 |
2.1 ± 0.0 |
31.3 ± 0.9 |
39.38 ± 1.37 |
2.05 ± 0.08 |
| MX1 |
63.8 ± 1.2 |
2.7 ± 0.1 |
3.5 ± 0.1 |
31.2 ± 0.9 |
23.68 ± 0.82 |
2.05 ± 0.08 |
| MX2 |
63.8 ± 1.2 |
2.7 ± 0.1 |
3.5 ± 0.1 |
31.2 ± 0.9 |
23.79 ± 0.83 |
2.05 ± 0.08 |
| MX3 |
63.8 ± 1.2 |
2.7 ± 0.1 |
3.4 ± 0.1 |
31.2 ± 0.9 |
23.90 ± 0.83 |
2.05 ± 0.08 |
| RH8 |
64.0 ± 1.2 |
1.7 ± 0.0 |
2.2 ± 0.0 |
31.3 ± 0.9 |
37.81 ± 1.30 |
2.05 ± 0.08 |
| RH9 |
44.3 ± 0.5 |
3.8 ± 0.1 |
4.9 ± 0.1 |
31.1 ± 0.9 |
11.53 ± 0.27 |
1.43 ± 0.04 |
| RH10 |
45.8 ± 0.5 |
3.8 ± 0.1 |
4.9 ± 0.1 |
31.1 ± 0.9 |
12.05 ± 0.28 |
1.48 ± 0.04 |
| Average |
57.9 |
2.9 |
3.7 |
31.1 |
23.1 |
1.9 |
| Median |
63.8 |
2.7 |
3.5 |
31.2 |
23.8 |
2.0 |
| Deviation |
8.7 |
1.0 |
1.2 |
0.1 |
11.0 |
0.3 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
14.8 ± 0.8 |
4.5 ± 0.1 |
6.0 ± 0.3 |
33.1 ± 0.7 |
3.27 ± 0.24 |
0.45 ± 0.03 |
| VC |
17.7 ± 0.9 |
1.8 ± 0.0 |
2.3 ± 0.1 |
33.3 ± 0.7 |
10.07 ± 0.66 |
0.53 ± 0.03 |
| MX1 |
17.5 ± 0.9 |
2.9 ± 0.1 |
3.9 ± 0.2 |
33.3 ± 0.7 |
6.03 ± 0.39 |
0.53 ± 0.03 |
| MX2 |
17.5 ± 0.9 |
2.9 ± 0.1 |
3.9 ± 0.2 |
33.3 ± 0.7 |
6.06 ± 0.39 |
0.53 ± 0.03 |
| MX3 |
17.5 ± 0.9 |
2.9 ± 0.1 |
3.8 ± 0.2 |
33.3 ± 0.7 |
6.09 ± 0.39 |
0.53 ± 0.03 |
| RH8 |
17.7 ± 0.9 |
1.8 ± 0.0 |
2.4 ± 0.1 |
33.3 ± 0.7 |
9.67 ± 0.64 |
0.53 ± 0.03 |
| RH9 |
12.2 ± 0.8 |
4.1 ± 0.1 |
5.5 ± 0.2 |
33.1 ± 0.7 |
2.94 ± 0.25 |
0.37 ± 0.03 |
| RH10 |
12.6 ± 0.8 |
4.1 ± 0.1 |
5.4 ± 0.2 |
33.1 ± 0.7 |
3.08 ± 0.26 |
0.38 ± 0.03 |
| Average |
16.0 |
3.1 |
4.2 |
33.2 |
5.9 |
0.5 |
| Median |
17.5 |
2.9 |
3.9 |
33.3 |
6.1 |
0.5 |
| Deviation |
2.4 |
1.1 |
1.4 |
0.1 |
2.8 |
0.1 |
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)
| 
