Database: Ace Shock Analysis
Event ID: 20000420212
Observation time: 02/11/2000 42.09230 0212 [UT]
|
|
General
Information (About, Top)
| Year |
2000 |
| Fractional day of year |
42.092303 |
| Arrival time of shock [seconds of day] |
7975.0 ± 32.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.038 |
| Y GSE location of spacecraft [Re] |
-0.001 |
| Z GSE location of spacecraft [Re] |
0.004 |
| Upstream plasma points selected for analysis |
0010 |
| Upstream field points selected for analysis |
0039 |
| Downstream plasma points selected for analysis |
0009
|
| Downstream field points selected for analysis |
0038 |
| Minimum chisq/dof for RH8,RH9,RH10 |
3.93, 5.77, 5.88 |
Event added to database
|
Sat Apr 30 21:45:47 2005
|
Event last processed
|
Wed Oct 15 15:54:54 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.007 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-414.5 ± 5.5 |
-501.4 ± 13.2 |
| Vy GSE [km/s] |
4.6 ± 9.6 |
44.3 ± 10.4 |
| Vz GSE [km/s] |
-25.8 ± 8.6 |
-14.0 ± 13.0 |
| Wi [km/s] |
41.9 ± 3.8 |
60.6 ± 8.8 |
| We [km/s] |
1324.1 ± 120.1 |
1915.7 ± 278.9 |
| Ni [n/cc] |
3.3 ± 0.4 |
8.9 ± 1.0 |
| Bx GSE [nT] |
5.3 ± 0.2 |
6.2 ± 1.9 |
| By GSE [nT] |
-0.7 ± 0.7 |
7.0 ± 2.3 |
| Bz GSE [nT] |
-0.6 ± 0.8 |
3.5 ± 1.7 |
Plasma Beta
|
0.419 ± 0.438
|
0.684 ± 0.612
|
Sound Speed [km/s]
|
53.12 ± 4.89
|
77.32 ± 10.67
|
Alfven Speed [km/s]
|
63.62 ± 3.24
|
76.48 ± 9.34
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.994 ± 0.019 |
0.092 ± 0.185 |
0.062 ± 0.062 |
3.56 ± 7.79 |
174.68 ± 10.67 |
| VC |
-0.904 ± 0.051 |
0.407 ± 0.107 |
0.128 ± 0.128 |
7.37 ± 8.97 |
155.78 ± 6.76 |
| MX1 |
-0.994 ± 0.031 |
0.099 ± 0.286 |
0.055 ± 0.055 |
3.16 ± 12.63 |
174.31 ± 16.47 |
| MX2 |
-0.989 ± 0.025 |
0.141 ± 0.171 |
-0.035 ± 0.035 |
-2.01 ± 7.18 |
171.89 ± 9.87 |
| MX3 |
-0.986 ± 0.027 |
0.156 ± 0.163 |
-0.058 ± 0.058 |
-3.31 ± 8.14 |
171.02 ± 9.47 |
| RH08 |
-1.000 ± 0.000 |
0.009 ± 0.013 |
-0.028 ± 0.028 |
-1.60 ± 0.77 |
179.50 ± 0.74 |
| RH09 |
-0.999 ± 0.003 |
-0.026 ± 0.068 |
-0.028 ± 0.028 |
-1.60 ± 4.06 |
181.50 ± 3.91 |
| RH10 |
-0.999 ± 0.003 |
-0.026 ± 0.068 |
-0.028 ± 0.028 |
-1.60 ± 4.06 |
181.50 ± 3.91 |
| Average |
-0.983 |
0.106 |
0.009 |
0.497 |
173.774 |
| Median |
-0.994 |
0.099 |
-0.028 |
-1.601 |
174.684 |
| Deviation |
0.032 |
0.141 |
0.065 |
3.736 |
8.351 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
9.5 ± 5.5 |
550.6 ± 29.0 |
2.50 ± 0.34 |
| VC |
18.4 ± 5.2 |
520.9 ± 31.5 |
2.50 ± 0.34 |
| MX1 |
9.4 ± 5.7 |
550.9 ± 29.2 |
2.50 ± 0.34 |
| MX2 |
11.6 ± 7.2 |
550.9 ± 30.5 |
2.50 ± 0.34 |
| MX3 |
12.5 ± 7.6 |
549.9 ± 30.9 |
2.50 ± 0.34 |
| RH08 |
13.0 ± 8.0 |
546.9 ± 28.5 |
2.50 ± 0.34 |
| RH09 |
13.9 ± 8.5 |
544.2 ± 27.9 |
2.50 ± 0.34 |
| RH10 |
13.9 ± 8.5 |
544.2 ± 27.9 |
2.50 ± 0.34 |
| Average |
12.8 |
544.8 |
2.50 |
| Median |
13.0 |
549.9 |
2.50 |
| Deviation |
2.9 |
10.1 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
138.6 ± 2.8 |
51.0 ± 4.4 |
62.7 ± 3.2 |
65.4 ± 3.4 |
2.74 ± 0.31 |
2.13 ± 0.15 |
| VC |
146.7 ± 4.7 |
46.8 ± 3.8 |
60.4 ± 3.1 |
68.4 ± 3.8 |
3.16 ± 0.39 |
2.15 ± 0.19 |
| MX1 |
138.7 ± 2.8 |
51.0 ± 4.4 |
62.8 ± 3.2 |
65.4 ± 3.4 |
2.74 ± 0.31 |
2.13 ± 0.15 |
| MX2 |
137.9 ± 2.8 |
50.1 ± 4.2 |
62.3 ± 3.2 |
66.1 ± 3.5 |
2.78 ± 0.30 |
2.09 ± 0.15 |
| MX3 |
137.7 ± 2.8 |
49.7 ± 4.2 |
62.1 ± 3.2 |
66.3 ± 3.6 |
2.79 ± 0.30 |
2.08 ± 0.14 |
| RH8 |
130.3 ± 2.7 |
49.5 ± 4.1 |
62.0 ± 3.2 |
66.5 ± 3.6 |
2.65 ± 0.27 |
1.97 ± 0.13 |
| RH9 |
127.8 ± 2.8 |
49.0 ± 4.1 |
61.7 ± 3.1 |
66.8 ± 3.6 |
2.63 ± 0.26 |
1.92 ± 0.13 |
| RH10 |
127.8 ± 2.8 |
49.0 ± 4.1 |
61.7 ± 3.1 |
66.8 ± 3.6 |
2.63 ± 0.26 |
1.92 ± 0.13 |
| Average |
135.7 |
49.5 |
62.0 |
66.5 |
2.8 |
2.0 |
| Median |
137.9 |
49.7 |
62.1 |
66.5 |
2.7 |
2.1 |
| Deviation |
6.5 |
1.3 |
0.8 |
1.0 |
0.2 |
0.1 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
51.6 ± 11.5 |
66.8 ± 6.6 |
75.4 ± 9.2 |
86.5 ± 5.1 |
0.78 ± 0.19 |
0.60 ± 0.13 |
| VC |
54.2 ± 12.9 |
61.3 ± 5.3 |
72.6 ± 8.9 |
90.6 ± 5.0 |
0.89 ± 0.23 |
0.60 ± 0.14 |
| MX1 |
51.6 ± 11.5 |
66.8 ± 6.6 |
75.4 ± 9.2 |
86.5 ± 5.1 |
0.78 ± 0.20 |
0.60 ± 0.13 |
| MX2 |
50.8 ± 12.2 |
65.6 ± 6.2 |
74.9 ± 9.2 |
87.4 ± 5.0 |
0.78 ± 0.21 |
0.58 ± 0.14 |
| MX3 |
50.5 ± 12.4 |
65.1 ± 6.1 |
74.7 ± 9.1 |
87.8 ± 5.0 |
0.78 ± 0.21 |
0.58 ± 0.14 |
| RH8 |
47.3 ± 11.3 |
64.7 ± 6.0 |
74.5 ± 9.1 |
88.1 ± 5.0 |
0.74 ± 0.19 |
0.54 ± 0.13 |
| RH9 |
46.2 ± 11.0 |
64.2 ± 5.9 |
74.2 ± 9.1 |
88.5 ± 5.0 |
0.73 ± 0.19 |
0.52 ± 0.12 |
| RH10 |
46.2 ± 11.0 |
64.2 ± 5.9 |
74.2 ± 9.1 |
88.5 ± 5.0 |
0.73 ± 0.19 |
0.52 ± 0.12 |
| Average |
49.8 |
64.8 |
74.5 |
88.0 |
0.8 |
0.6 |
| Median |
50.8 |
65.1 |
74.7 |
88.1 |
0.8 |
0.6 |
| Deviation |
2.9 |
1.8 |
0.9 |
1.3 |
0.1 |
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)
| 
