Database: Ace Shock Analysis
Event ID: 20011080004
Observation time: 04/18/2001 108.00316 0004 [UT]
|
|
General
Information (About, Top)
| Year |
2001 |
| Fractional day of year |
108.003160 |
| Arrival time of shock [seconds of day] |
273.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.035 |
| Y GSE location of spacecraft [Re] |
0.000 |
| Z GSE location of spacecraft [Re] |
-0.003 |
| Upstream plasma points selected for analysis |
0009 |
| Upstream field points selected for analysis |
0040 |
| Downstream plasma points selected for analysis |
0014
|
| Downstream field points selected for analysis |
0058 |
| Minimum chisq/dof for RH8,RH9,RH10 |
2.34, 3.79, 3.85 |
Event added to database
|
Sat Apr 30 21:50:58 2005
|
Event last processed
|
Tue May 3 13:56:54 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.007 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-373.0 ± 1.8 |
-494.3 ± 9.7 |
| Vy GSE [km/s] |
-28.2 ± 2.5 |
-45.9 ± 4.1 |
| Vz GSE [km/s] |
-2.5 ± 1.7 |
34.0 ± 19.0 |
| Wi [km/s] |
23.0 ± 3.5 |
57.8 ± 5.1 |
| We [km/s] |
728.0 ± 110.9 |
1826.7 ± 159.7 |
| Ni [n/cc] |
5.7 ± 0.4 |
24.3 ± 3.3 |
| Bx GSE [nT] |
-2.1 ± 0.3 |
2.0 ± 3.1 |
| By GSE [nT] |
-3.7 ± 0.2 |
-11.2 ± 2.7 |
| Bz GSE [nT] |
-1.8 ± 0.8 |
-8.0 ± 9.9 |
Plasma Beta
|
0.309 ± 0.305
|
0.632 ± 0.549
|
Sound Speed [km/s]
|
29.72 ± 4.53
|
74.57 ± 6.52
|
Alfven Speed [km/s]
|
42.66 ± 3.19
|
76.62 ± 11.88
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.705 ± 0.199 |
-0.710 ± 0.198 |
-0.004 ± 0.004 |
-0.25 ± 16.49 |
225.20 ± 16.11 |
| VC |
-0.948 ± 0.044 |
-0.139 ± 0.036 |
0.287 ± 0.279 |
16.66 ± 8.82 |
188.36 ± 2.13 |
| MX1 |
-0.934 ± 0.136 |
-0.335 ± 0.369 |
0.121 ± 0.121 |
6.96 ± 16.06 |
199.75 ± 22.61 |
| MX2 |
-0.939 ± 0.051 |
-0.298 ± 0.093 |
0.173 ± 0.172 |
9.99 ± 14.51 |
197.60 ± 5.61 |
| MX3 |
-0.944 ± 0.055 |
-0.277 ± 0.094 |
0.180 ± 0.178 |
10.37 ± 15.74 |
196.37 ± 5.65 |
| RH08 |
-0.987 ± 0.002 |
-0.078 ± 0.014 |
0.140 ± 0.139 |
8.03 ± 0.82 |
184.51 ± 0.80 |
| RH09 |
-0.984 ± 0.013 |
-0.078 ± 0.070 |
0.162 ± 0.161 |
9.32 ± 4.03 |
184.51 ± 4.07 |
| RH10 |
-0.984 ± 0.013 |
-0.078 ± 0.070 |
0.162 ± 0.161 |
9.32 ± 4.03 |
184.51 ± 4.07 |
| Average |
-0.928 |
-0.249 |
0.153 |
8.800 |
195.101 |
| Median |
-0.944 |
-0.139 |
0.162 |
9.324 |
196.370 |
| Deviation |
0.093 |
0.215 |
0.080 |
4.662 |
13.717 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
27.6 ± 6.5 |
414.9 ± 12.6 |
4.22 ± 0.62 |
| VC |
64.6 ± 5.1 |
524.0 ± 13.8 |
4.22 ± 0.62 |
| MX1 |
50.0 ± 4.9 |
520.8 ± 14.4 |
4.22 ± 0.62 |
| MX2 |
53.5 ± 5.1 |
523.2 ± 14.1 |
4.22 ± 0.62 |
| MX3 |
54.7 ± 5.0 |
525.0 ± 14.1 |
4.22 ± 0.62 |
| RH08 |
63.0 ± 4.3 |
535.5 ± 14.9 |
4.22 ± 0.62 |
| RH09 |
63.6 ± 4.4 |
534.4 ± 14.7 |
4.22 ± 0.62 |
| RH10 |
63.6 ± 4.4 |
534.4 ± 14.7 |
4.22 ± 0.62 |
| Average |
55.1 |
514.0 |
4.22 |
| Median |
63.0 |
525.0 |
4.22 |
| Deviation |
12.4 |
40.5 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
132.0 ± 2.6 |
24.1 ± 2.6 |
37.8 ± 2.8 |
46.2 ± 2.3 |
5.54 ± 0.72 |
2.86 ± 0.14 |
| VC |
167.3 ± 1.8 |
10.6 ± 0.9 |
18.3 ± 1.4 |
51.1 ± 2.2 |
15.95 ± 1.57 |
3.28 ± 0.16 |
| MX1 |
163.2 ± 2.2 |
16.3 ± 1.5 |
27.4 ± 2.1 |
49.6 ± 2.1 |
10.10 ± 1.07 |
3.30 ± 0.16 |
| MX2 |
165.1 ± 2.1 |
15.0 ± 1.4 |
25.4 ± 1.9 |
50.0 ± 2.1 |
11.13 ± 1.16 |
3.31 ± 0.16 |
| MX3 |
165.6 ± 2.1 |
14.5 ± 1.3 |
24.7 ± 1.8 |
50.1 ± 2.1 |
11.52 ± 1.19 |
3.31 ± 0.16 |
| RH8 |
165.4 ± 1.8 |
11.2 ± 1.0 |
19.4 ± 1.4 |
51.0 ± 2.2 |
14.88 ± 1.47 |
3.25 ± 0.15 |
| RH9 |
165.6 ± 1.8 |
10.9 ± 1.0 |
18.9 ± 1.4 |
51.1 ± 2.2 |
15.26 ± 1.50 |
3.25 ± 0.15 |
| RH10 |
165.6 ± 1.8 |
10.9 ± 1.0 |
18.9 ± 1.4 |
51.1 ± 2.2 |
15.26 ± 1.50 |
3.25 ± 0.15 |
| Average |
161.2 |
14.2 |
23.9 |
50.0 |
12.5 |
3.2 |
| Median |
165.6 |
14.5 |
24.7 |
51.0 |
14.9 |
3.3 |
| Deviation |
11.9 |
4.6 |
6.6 |
1.6 |
3.6 |
0.1 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
34.1 ± 7.7 |
53.9 ± 3.8 |
67.9 ± 10.5 |
93.0 ± 6.4 |
0.64 ± 0.17 |
0.37 ± 0.11 |
| VC |
39.4 ± 6.9 |
23.1 ± 1.6 |
32.9 ± 5.1 |
105.0 ± 7.1 |
1.71 ± 0.34 |
0.38 ± 0.08 |
| MX1 |
39.5 ± 7.9 |
35.8 ± 2.5 |
49.2 ± 7.6 |
101.3 ± 6.9 |
1.11 ± 0.27 |
0.39 ± 0.10 |
| MX2 |
39.6 ± 7.5 |
32.8 ± 2.3 |
45.6 ± 7.1 |
102.3 ± 6.9 |
1.21 ± 0.27 |
0.39 ± 0.09 |
| MX3 |
39.7 ± 7.5 |
31.8 ± 2.2 |
44.3 ± 6.9 |
102.7 ± 6.9 |
1.26 ± 0.28 |
0.39 ± 0.09 |
| RH8 |
39.2 ± 8.1 |
24.5 ± 1.7 |
34.8 ± 5.4 |
104.6 ± 7.1 |
1.61 ± 0.40 |
0.38 ± 0.10 |
| RH9 |
39.0 ± 7.9 |
24.0 ± 1.6 |
34.0 ± 5.3 |
104.8 ± 7.1 |
1.64 ± 0.39 |
0.38 ± 0.09 |
| RH10 |
39.0 ± 7.9 |
24.0 ± 1.6 |
34.0 ± 5.3 |
104.8 ± 7.1 |
1.64 ± 0.39 |
0.38 ± 0.09 |
| Average |
38.7 |
31.2 |
42.8 |
102.3 |
1.4 |
0.4 |
| Median |
39.4 |
31.8 |
44.3 |
104.6 |
1.6 |
0.4 |
| Deviation |
1.9 |
10.4 |
11.9 |
4.0 |
0.4 |
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)
| 
