Database: Ace Shock Analysis
Event ID: 19992940137
Observation time: 10/21/1999 294.06763 0137 [UT]
|
|
General
Information (About, Top)
| Year |
1999 |
| Fractional day of year |
294.067627 |
| Arrival time of shock [seconds of day] |
5843.0 ± 32.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.035 |
| Y GSE location of spacecraft [Re] |
-0.004 |
| Z GSE location of spacecraft [Re] |
-0.002 |
| Upstream plasma points selected for analysis |
0008 |
| Upstream field points selected for analysis |
0032 |
| Downstream plasma points selected for analysis |
0004
|
| Downstream field points selected for analysis |
0018 |
| Minimum chisq/dof for RH8,RH9,RH10 |
9.88, 22.34, 23.61 |
Event added to database
|
Sat Apr 30 21:44:51 2005
|
Event last processed
|
Wed Oct 15 15:25:20 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.008 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-344.1 ± 3.9 |
-421.2 ± 6.7 |
| Vy GSE [km/s] |
-27.5 ± 2.3 |
-46.3 ± 1.1 |
| Vz GSE [km/s] |
7.7 ± 2.0 |
45.1 ± 7.0 |
| Wi [km/s] |
27.7 ± 1.1 |
43.1 ± 5.4 |
| We [km/s] |
874.7 ± 34.5 |
1361.8 ± 170.6 |
| Ni [n/cc] |
10.4 ± 1.3 |
31.1 ± 2.1 |
| Bx GSE [nT] |
-4.6 ± 0.6 |
-4.5 ± 1.3 |
| By GSE [nT] |
6.4 ± 0.8 |
21.5 ± 0.5 |
| Bz GSE [nT] |
5.9 ± 0.7 |
8.0 ± 1.2 |
Plasma Beta
|
0.181 ± 0.179
|
0.233 ± 0.217
|
Sound Speed [km/s]
|
35.84 ± 1.44
|
54.44 ± 6.75
|
Alfven Speed [km/s]
|
65.48 ± 4.39
|
87.47 ± 4.69
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.677 ± 0.094 |
-0.093 ± 0.086 |
0.730 ± 0.559 |
46.88 ± 7.36 |
187.80 ± 7.20 |
| VC |
-0.882 ± 0.025 |
-0.210 ± 0.029 |
0.421 ± 0.394 |
24.91 ± 3.31 |
193.38 ± 1.82 |
| MX1 |
-0.870 ± 0.027 |
-0.073 ± 0.073 |
0.487 ± 0.444 |
29.15 ± 3.10 |
184.78 ± 4.79 |
| MX2 |
-0.887 ± 0.022 |
-0.072 ± 0.075 |
0.456 ± 0.422 |
27.15 ± 2.64 |
184.62 ± 4.82 |
| MX3 |
-0.895 ± 0.022 |
-0.071 ± 0.076 |
0.441 ± 0.410 |
26.17 ± 2.79 |
184.54 ± 4.84 |
| RH08 |
-0.975 ± 0.004 |
-0.077 ± 0.013 |
0.207 ± 0.204 |
11.93 ± 1.12 |
184.51 ± 0.76 |
| RH09 |
-0.959 ± 0.020 |
-0.076 ± 0.070 |
0.274 ± 0.267 |
15.89 ± 4.01 |
184.51 ± 4.20 |
| RH10 |
-0.959 ± 0.020 |
-0.076 ± 0.070 |
0.274 ± 0.267 |
15.89 ± 4.01 |
184.51 ± 4.20 |
| Average |
-0.888 |
-0.093 |
0.411 |
24.746 |
186.084 |
| Median |
-0.887 |
-0.076 |
0.441 |
26.172 |
184.625 |
| Deviation |
0.094 |
0.048 |
0.165 |
10.945 |
3.160 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
45.5 ± 5.8 |
364.3 ± 2.7 |
3.38 ± 0.71 |
| VC |
57.6 ± 5.1 |
446.3 ± 2.8 |
3.38 ± 0.71 |
| MX1 |
48.8 ± 5.1 |
437.8 ± 2.8 |
3.38 ± 0.71 |
| MX2 |
49.6 ± 5.0 |
443.2 ± 2.8 |
3.38 ± 0.71 |
| MX3 |
50.0 ± 5.0 |
445.6 ± 2.8 |
3.38 ± 0.71 |
| RH08 |
57.6 ± 4.2 |
469.1 ± 2.7 |
3.38 ± 0.71 |
| RH09 |
55.3 ± 4.4 |
464.9 ± 2.8 |
3.38 ± 0.71 |
| RH10 |
55.3 ± 4.4 |
464.9 ± 15.4 |
3.38 ± 0.71 |
| Average |
52.5 |
442.0 |
3.38 |
| Median |
55.3 |
446.3 |
3.38 |
| Deviation |
4.6 |
33.5 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
122.7 ± 3.8 |
23.2 ± 1.0 |
45.9 ± 3.1 |
71.0 ± 4.2 |
5.30 ± 0.21 |
1.73 ± 0.09 |
| VC |
133.4 ± 4.2 |
17.3 ± 0.7 |
35.1 ± 2.4 |
72.6 ± 4.2 |
7.71 ± 0.28 |
1.84 ± 0.08 |
| MX1 |
132.2 ± 4.2 |
21.6 ± 0.9 |
43.1 ± 2.9 |
71.5 ± 4.2 |
6.12 ± 0.23 |
1.85 ± 0.09 |
| MX2 |
132.2 ± 4.2 |
21.2 ± 0.9 |
42.4 ± 2.8 |
71.6 ± 4.2 |
6.23 ± 0.23 |
1.85 ± 0.09 |
| MX3 |
132.1 ± 4.2 |
21.1 ± 0.9 |
42.1 ± 2.8 |
71.6 ± 4.2 |
6.28 ± 0.23 |
1.85 ± 0.09 |
| RH8 |
129.6 ± 4.2 |
17.3 ± 0.7 |
35.1 ± 2.4 |
72.6 ± 4.2 |
7.50 ± 0.26 |
1.79 ± 0.08 |
| RH9 |
130.5 ± 4.2 |
18.5 ± 0.8 |
37.3 ± 2.5 |
72.3 ± 4.2 |
7.08 ± 0.25 |
1.81 ± 0.08 |
| RH10 |
130.5 ± 4.2 |
18.5 ± 0.8 |
37.3 ± 2.5 |
72.3 ± 4.2 |
7.08 ± 0.25 |
1.81 ± 0.08 |
| Average |
130.4 |
19.8 |
39.8 |
71.9 |
6.7 |
1.8 |
| Median |
132.1 |
21.1 |
42.1 |
72.3 |
7.1 |
1.8 |
| Deviation |
3.3 |
2.2 |
4.1 |
0.6 |
0.8 |
0.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
40.3 ± 8.0 |
34.3 ± 3.5 |
61.4 ± 3.3 |
97.2 ± 6.3 |
1.18 ± 0.27 |
0.42 ± 0.09 |
| VC |
44.0 ± 8.3 |
25.5 ± 2.6 |
46.9 ± 2.5 |
99.9 ± 6.6 |
1.74 ± 0.39 |
0.44 ± 0.09 |
| MX1 |
43.6 ± 8.6 |
31.9 ± 3.3 |
57.6 ± 3.1 |
98.0 ± 6.4 |
1.38 ± 0.32 |
0.45 ± 0.09 |
| MX2 |
43.4 ± 8.6 |
31.4 ± 3.2 |
56.7 ± 3.0 |
98.2 ± 6.4 |
1.39 ± 0.32 |
0.44 ± 0.09 |
| MX3 |
43.3 ± 8.7 |
31.1 ± 3.2 |
56.2 ± 3.0 |
98.3 ± 6.4 |
1.40 ± 0.33 |
0.44 ± 0.09 |
| RH8 |
42.8 ± 8.8 |
25.5 ± 2.6 |
46.8 ± 2.5 |
99.9 ± 6.6 |
1.69 ± 0.40 |
0.43 ± 0.09 |
| RH9 |
42.6 ± 8.8 |
27.2 ± 2.7 |
49.8 ± 2.7 |
99.4 ± 6.6 |
1.58 ± 0.38 |
0.43 ± 0.09 |
| RH10 |
42.6 ± 8.8 |
27.2 ± 2.7 |
49.8 ± 2.7 |
99.4 ± 6.6 |
1.58 ± 0.38 |
0.43 ± 0.09 |
| Average |
42.8 |
29.3 |
53.2 |
98.8 |
1.5 |
0.4 |
| Median |
43.3 |
31.1 |
56.2 |
99.4 |
1.6 |
0.4 |
| Deviation |
1.1 |
3.3 |
5.5 |
1.0 |
0.2 |
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)
| 
