Database: Ace Shock Analysis
Event ID: 20020821053
Observation time: 03/23/2002 82.45376 1053 [UT]
|
|
General
Information (About, Top)
| Year |
2002 |
| Fractional day of year |
82.453762 |
| Arrival time of shock [seconds of day] |
39205.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
| X GSE location of spacecraft [Re] |
0.035 |
| Y GSE location of spacecraft [Re] |
-0.002 |
| Z GSE location of spacecraft [Re] |
-0.002 |
| Upstream plasma points selected for analysis |
0008 |
| Upstream field points selected for analysis |
0031 |
| Downstream plasma points selected for analysis |
0005
|
| Downstream field points selected for analysis |
0024 |
| Minimum chisq/dof for RH8,RH9,RH10 |
10.52, 12.47, 13.57 |
Event added to database
|
Sun May 1 22:05:03 2005
|
Event last processed
|
Tue May 3 14:17:55 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.007 ± 0.001
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-394.5 ± 1.3 |
-462.2 ± 4.9 |
| Vy GSE [km/s] |
-8.5 ± 3.4 |
0.7 ± 4.2 |
| Vz GSE [km/s] |
5.8 ± 2.8 |
54.9 ± 2.2 |
| Wi [km/s] |
25.2 ± 3.1 |
33.1 ± 1.0 |
| We [km/s] |
798.0 ± 99.3 |
1045.1 ± 30.8 |
| Ni [n/cc] |
3.3 ± 0.2 |
11.2 ± 0.6 |
| Bx GSE [nT] |
2.3 ± 0.3 |
2.3 ± 0.7 |
| By GSE [nT] |
-3.7 ± 0.3 |
-10.2 ± 0.7 |
| Bz GSE [nT] |
0.5 ± 0.2 |
2.5 ± 1.2 |
Plasma Beta
|
0.237 ± 0.233
|
0.221 ± 0.224
|
Sound Speed [km/s]
|
32.58 ± 4.06
|
42.67 ± 1.26
|
Alfven Speed [km/s]
|
53.27 ± 3.62
|
70.49 ± 3.54
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.955 ± 0.073 |
0.141 ± 0.102 |
0.261 ± 0.255 |
15.12 ± 15.98 |
171.59 ± 6.08 |
| VC |
-0.805 ± 0.023 |
0.110 ± 0.060 |
0.583 ± 0.506 |
35.67 ± 2.11 |
172.19 ± 4.30 |
| MX1 |
-0.816 ± 0.025 |
0.171 ± 0.037 |
0.552 ± 0.487 |
33.49 ± 2.53 |
168.15 ± 2.58 |
| MX2 |
-0.811 ± 0.022 |
0.173 ± 0.038 |
0.559 ± 0.492 |
33.99 ± 2.19 |
167.97 ± 2.64 |
| MX3 |
-0.808 ± 0.022 |
0.174 ± 0.038 |
0.562 ± 0.494 |
34.23 ± 2.11 |
167.88 ± 2.69 |
| RH08 |
-0.917 ± 0.007 |
0.105 ± 0.011 |
0.385 ± 0.365 |
22.67 ± 1.09 |
173.48 ± 0.68 |
| RH09 |
-0.917 ± 0.028 |
0.105 ± 0.053 |
0.385 ± 0.365 |
22.67 ± 4.15 |
173.48 ± 3.31 |
| RH10 |
-0.917 ± 0.028 |
0.105 ± 0.063 |
0.385 ± 0.365 |
22.67 ± 4.11 |
173.48 ± 3.96 |
| Average |
-0.868 |
0.135 |
0.459 |
27.565 |
171.028 |
| Median |
-0.816 |
0.141 |
0.552 |
33.491 |
172.186 |
| Deviation |
0.063 |
0.033 |
0.120 |
7.683 |
2.598 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
53.2 ± 4.3 |
488.9 ± 6.2 |
3.44 ± 0.30 |
| VC |
62.7 ± 3.8 |
439.3 ± 6.2 |
3.44 ± 0.30 |
| MX1 |
58.8 ± 3.8 |
442.9 ± 6.1 |
3.44 ± 0.30 |
| MX2 |
58.9 ± 3.8 |
440.9 ± 6.0 |
3.44 ± 0.30 |
| MX3 |
59.0 ± 3.8 |
439.9 ± 6.0 |
3.44 ± 0.30 |
| RH08 |
57.7 ± 4.2 |
479.1 ± 6.4 |
3.44 ± 0.30 |
| RH09 |
57.7 ± 4.2 |
479.1 ± 6.4 |
3.44 ± 0.30 |
| RH10 |
57.7 ± 4.2 |
479.1 ± 6.4 |
3.44 ± 0.30 |
| Average |
58.2 |
461.2 |
3.44 |
| Median |
58.8 |
479.1 |
3.44 |
| Deviation |
2.6 |
22.1 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
111.9 ± 1.3 |
17.1 ± 1.3 |
31.9 ± 2.2 |
60.2 ± 1.7 |
6.56 ± 0.53 |
1.86 ± 0.04 |
| VC |
119.3 ± 1.6 |
12.9 ± 0.9 |
24.4 ± 1.7 |
61.3 ± 1.7 |
9.30 ± 0.64 |
1.95 ± 0.05 |
| MX1 |
119.2 ± 1.4 |
14.7 ± 1.1 |
27.6 ± 1.9 |
60.9 ± 1.7 |
8.15 ± 0.59 |
1.96 ± 0.05 |
| MX2 |
119.2 ± 1.4 |
14.6 ± 1.1 |
27.5 ± 1.9 |
60.9 ± 1.7 |
8.19 ± 0.59 |
1.96 ± 0.05 |
| MX3 |
119.2 ± 1.4 |
14.6 ± 1.1 |
27.4 ± 1.9 |
60.9 ± 1.7 |
8.21 ± 0.59 |
1.96 ± 0.05 |
| RH8 |
116.1 ± 1.3 |
15.2 ± 1.1 |
28.5 ± 1.9 |
60.8 ± 1.7 |
7.69 ± 0.58 |
1.91 ± 0.04 |
| RH9 |
116.1 ± 1.3 |
15.2 ± 1.1 |
28.5 ± 1.9 |
60.8 ± 1.7 |
7.69 ± 0.58 |
1.91 ± 0.04 |
| RH10 |
116.1 ± 1.3 |
15.2 ± 1.1 |
28.5 ± 1.9 |
60.8 ± 1.7 |
7.69 ± 0.58 |
1.91 ± 0.04 |
| Average |
117.1 |
14.9 |
28.0 |
60.8 |
7.9 |
1.9 |
| Median |
119.2 |
15.2 |
28.5 |
60.9 |
8.2 |
1.9 |
| Deviation |
2.6 |
1.2 |
2.0 |
0.3 |
0.8 |
0.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
33.1 ± 4.9 |
22.7 ± 0.5 |
42.2 ± 2.1 |
79.2 ± 3.1 |
1.46 ± 0.23 |
0.42 ± 0.07 |
| VC |
35.2 ± 4.8 |
17.1 ± 0.4 |
32.3 ± 1.6 |
80.6 ± 3.1 |
2.06 ± 0.30 |
0.44 ± 0.07 |
| MX1 |
35.3 ± 4.7 |
19.5 ± 0.5 |
36.5 ± 1.8 |
80.1 ± 3.1 |
1.82 ± 0.26 |
0.44 ± 0.07 |
| MX2 |
35.3 ± 4.6 |
19.4 ± 0.4 |
36.4 ± 1.8 |
80.1 ± 3.1 |
1.82 ± 0.26 |
0.44 ± 0.07 |
| MX3 |
35.2 ± 4.6 |
19.3 ± 0.4 |
36.3 ± 1.8 |
80.1 ± 3.1 |
1.83 ± 0.26 |
0.44 ± 0.07 |
| RH8 |
34.2 ± 5.0 |
20.1 ± 0.5 |
37.6 ± 1.9 |
79.9 ± 3.1 |
1.70 ± 0.26 |
0.43 ± 0.07 |
| RH9 |
34.2 ± 5.0 |
20.1 ± 0.5 |
37.6 ± 1.9 |
79.9 ± 3.1 |
1.70 ± 0.26 |
0.43 ± 0.07 |
| RH10 |
34.2 ± 5.0 |
20.1 ± 0.5 |
37.6 ± 1.9 |
79.9 ± 3.1 |
1.70 ± 0.26 |
0.43 ± 0.07 |
| Average |
34.6 |
19.8 |
37.1 |
80.0 |
1.8 |
0.4 |
| Median |
35.2 |
20.1 |
37.6 |
80.1 |
1.8 |
0.4 |
| Deviation |
0.8 |
1.5 |
2.7 |
0.4 |
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)
| 
