Database: Ace Shock Analysis
Event ID: 19992270938
Observation time: 08/15/1999 227.40199 0938 [UT]
|
|
General
Information (About, Top)
| Year |
1999 |
| Fractional day of year |
227.401991 |
| Arrival time of shock [seconds of day] |
34732.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.039 |
| Y GSE location of spacecraft [Re] |
0.000 |
| Z GSE location of spacecraft [Re] |
0.004 |
| Upstream plasma points selected for analysis |
0008 |
| Upstream field points selected for analysis |
0038 |
| Downstream plasma points selected for analysis |
0010
|
| Downstream field points selected for analysis |
0039 |
| Minimum chisq/dof for RH8,RH9,RH10 |
2.88, 6.47, 6.61 |
Event added to database
|
Sat Apr 30 21:44:37 2005
|
Event last processed
|
Wed Oct 15 15:20:26 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.010 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-331.9 ± 5.3 |
-378.6 ± 5.2 |
| Vy GSE [km/s] |
-3.0 ± 2.2 |
-3.3 ± 3.1 |
| Vz GSE [km/s] |
-21.5 ± 3.6 |
-30.6 ± 3.9 |
| Wi [km/s] |
30.4 ± 2.1 |
37.8 ± 1.6 |
| We [km/s] |
961.6 ± 65.3 |
1194.3 ± 51.2 |
| Ni [n/cc] |
12.2 ± 0.6 |
32.5 ± 1.9 |
| Bx GSE [nT] |
-1.3 ± 0.7 |
-2.0 ± 1.0 |
| By GSE [nT] |
-3.5 ± 0.6 |
-7.8 ± 1.5 |
| Bz GSE [nT] |
-2.4 ± 0.9 |
-1.6 ± 2.9 |
Plasma Beta
|
1.428 ± 1.197
|
1.485 ± 1.342
|
Sound Speed [km/s]
|
39.57 ± 2.71
|
48.83 ± 2.19
|
Alfven Speed [km/s]
|
26.54 ± 3.37
|
32.14 ± 4.34
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.738 ± 0.450 |
-0.417 ± 0.613 |
-0.531 ± 0.474 |
-32.06 ± 37.58 |
209.49 ± 45.71 |
| VC |
-0.981 ± 0.021 |
-0.005 ± 0.076 |
-0.192 ± 0.190 |
-11.07 ± 6.25 |
180.28 ± 4.42 |
| MX1 |
-0.988 ± 0.058 |
0.124 ± 0.412 |
-0.091 ± 0.091 |
-5.22 ± 16.07 |
172.84 ± 23.88 |
| MX2 |
-0.980 ± 0.037 |
0.110 ± 0.187 |
-0.169 ± 0.167 |
-9.72 ± 10.59 |
173.60 ± 10.93 |
| MX3 |
-0.978 ± 0.044 |
0.071 ± 0.162 |
-0.198 ± 0.196 |
-11.44 ± 12.40 |
175.83 ± 9.47 |
| RH08 |
-0.992 ± 0.002 |
0.009 ± 0.014 |
-0.128 ± 0.128 |
-7.38 ± 0.91 |
179.50 ± 0.83 |
| RH09 |
-0.993 ± 0.008 |
0.043 ± 0.070 |
-0.106 ± 0.106 |
-6.09 ± 4.02 |
177.49 ± 4.03 |
| RH10 |
-0.993 ± 0.008 |
0.043 ± 0.070 |
-0.106 ± 0.106 |
-6.09 ± 4.02 |
177.49 ± 4.03 |
| Average |
-0.955 |
-0.003 |
-0.190 |
-11.135 |
180.815 |
| Median |
-0.981 |
0.043 |
-0.128 |
-7.382 |
177.493 |
| Deviation |
0.088 |
0.173 |
0.144 |
8.784 |
11.872 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
33.9 ± 7.7 |
320.2 ± 7.6 |
2.66 ± 0.21 |
| VC |
66.4 ± 8.5 |
404.7 ± 7.2 |
2.66 ± 0.21 |
| MX1 |
75.6 ± 8.6 |
403.0 ± 7.1 |
2.66 ± 0.21 |
| MX2 |
72.5 ± 8.4 |
402.5 ± 7.0 |
2.66 ± 0.21 |
| MX3 |
69.8 ± 8.4 |
402.9 ± 7.0 |
2.66 ± 0.21 |
| RH08 |
69.0 ± 8.6 |
406.2 ± 7.2 |
2.66 ± 0.21 |
| RH09 |
71.3 ± 8.7 |
406.0 ± 7.2 |
2.66 ± 0.21 |
| RH10 |
71.3 ± 8.7 |
406.0 ± 7.2 |
2.66 ± 0.21 |
| Average |
66.2 |
394.0 |
2.66 |
| Median |
71.3 |
404.7 |
2.66 |
| Deviation |
13.3 |
29.8 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
61.6 ± 4.5 |
20.0 ± 1.7 |
22.0 ± 2.8 |
43.4 ± 1.6 |
3.09 ± 0.23 |
1.42 ± 0.14 |
| VC |
74.0 ± 5.2 |
8.9 ± 0.6 |
10.6 ± 1.4 |
47.0 ± 1.4 |
8.33 ± 0.56 |
1.58 ± 0.13 |
| MX1 |
72.9 ± 5.2 |
5.5 ± 0.4 |
6.6 ± 0.8 |
47.5 ± 1.4 |
13.37 ± 0.92 |
1.54 ± 0.13 |
| MX2 |
73.4 ± 5.2 |
6.6 ± 0.5 |
8.0 ± 1.0 |
47.3 ± 1.4 |
11.11 ± 0.75 |
1.55 ± 0.13 |
| MX3 |
73.7 ± 5.2 |
7.6 ± 0.5 |
9.2 ± 1.2 |
47.2 ± 1.4 |
9.66 ± 0.65 |
1.56 ± 0.13 |
| RH8 |
73.6 ± 5.2 |
7.9 ± 0.6 |
9.5 ± 1.2 |
47.1 ± 1.4 |
9.30 ± 0.64 |
1.56 ± 0.13 |
| RH9 |
73.5 ± 5.2 |
7.1 ± 0.5 |
8.5 ± 1.1 |
47.3 ± 1.4 |
10.42 ± 0.72 |
1.56 ± 0.13 |
| RH10 |
73.5 ± 5.2 |
7.1 ± 0.5 |
8.5 ± 1.1 |
47.3 ± 1.4 |
10.42 ± 0.72 |
1.56 ± 0.13 |
| Average |
72.0 |
8.8 |
10.4 |
46.8 |
9.5 |
1.5 |
| Median |
73.5 |
7.6 |
9.2 |
47.3 |
10.4 |
1.6 |
| Deviation |
4.2 |
4.6 |
4.9 |
1.4 |
3.0 |
0.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
22.6 ± 5.6 |
24.3 ± 2.4 |
26.7 ± 3.6 |
53.3 ± 0.9 |
0.93 ± 0.21 |
0.42 ± 0.11 |
| VC |
26.5 ± 5.2 |
10.9 ± 0.9 |
12.9 ± 1.7 |
57.6 ± 1.0 |
2.46 ± 0.51 |
0.46 ± 0.09 |
| MX1 |
26.0 ± 4.9 |
6.7 ± 0.6 |
8.0 ± 1.1 |
58.2 ± 1.0 |
3.93 ± 0.82 |
0.45 ± 0.08 |
| MX2 |
26.2 ± 4.9 |
8.1 ± 0.7 |
9.7 ± 1.3 |
58.1 ± 1.0 |
3.27 ± 0.67 |
0.45 ± 0.08 |
| MX3 |
26.4 ± 5.0 |
9.3 ± 0.8 |
11.1 ± 1.5 |
57.9 ± 1.0 |
2.85 ± 0.58 |
0.46 ± 0.09 |
| RH8 |
26.2 ± 5.2 |
9.7 ± 0.8 |
11.5 ± 1.6 |
57.8 ± 1.0 |
2.73 ± 0.58 |
0.45 ± 0.09 |
| RH9 |
26.2 ± 5.1 |
8.6 ± 0.7 |
10.3 ± 1.4 |
58.0 ± 1.0 |
3.06 ± 0.65 |
0.45 ± 0.09 |
| RH10 |
26.2 ± 5.1 |
8.6 ± 0.7 |
10.3 ± 1.4 |
58.0 ± 1.0 |
3.06 ± 0.65 |
0.45 ± 0.09 |
| Average |
25.8 |
10.8 |
12.6 |
57.4 |
2.8 |
0.4 |
| Median |
26.2 |
9.3 |
11.1 |
58.0 |
3.1 |
0.5 |
| Deviation |
1.3 |
5.6 |
5.9 |
1.7 |
0.9 |
0.0 |
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)
| 
