Database: Ace Shock Analysis
Event ID: 20120151950
Observation time: 01/15/2012 15.82665 1950 [UT]
|
|
General
Information (About, Top)
| Year |
2012 |
| Fractional day of year |
15.826646 |
| Arrival time of shock [seconds of day] |
71422.2 ± 20.0 |
| Shock type |
SR |
| Electron data availability |
0 |
| X GSE location of spacecraft [Re] |
237.513 |
| Y GSE location of spacecraft [Re] |
29.842 |
| Z GSE location of spacecraft [Re] |
16.548 |
| Upstream plasma points selected for analysis |
0004 |
| Upstream field points selected for analysis |
0251 |
| Downstream plasma points selected for analysis |
0003
|
| Downstream field points selected for analysis |
0381 |
| Minimum chisq/dof for RH8,RH9,RH10 |
12.18, 26.25, 40.39 |
Event added to database
|
Tue Oct 14 16:05:33 2014
|
Event last processed
|
Tue Oct 14 16:50:11 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
65.081 ± 18.178
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-346.1 ± 1.1 |
-375.2 ± 0.9 |
| Vy GSE [km/s] |
-19.9 ± 0.9 |
-11.4 ± 1.1 |
| Vz GSE [km/s] |
-59.3 ± 2.4 |
-37.8 ± 2.5 |
| Wi [km/s] |
31.2 ± 1.5 |
30.2 ± 1.0 |
| We [km/s] |
987.4 ± 46.2 |
955.5 ± 31.9 |
| Ni [n/cc] |
10.1 ± 0.4 |
7.9 ± 0.2 |
| Bx GSE [nT] |
4.1 ± 0.3 |
6.0 ± 0.3 |
| By GSE [nT] |
-0.3 ± 0.3 |
-3.2 ± 1.2 |
| Bz GSE [nT] |
-2.6 ± 0.4 |
-4.5 ± 0.6 |
Plasma Beta
|
0.876 ± 0.926
|
0.228 ± 0.221
|
Sound Speed [km/s]
|
40.31 ± 1.88
|
39.01 ± 1.30
|
Alfven Speed [km/s]
|
33.42 ± 0.59
|
63.56 ± 2.86
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.738 ± 0.151 |
-0.614 ± 0.171 |
0.280 ± 0.273 |
16.27 ± 18.42 |
219.79 ± 12.48 |
| VC |
-0.783 ± 0.043 |
0.228 ± 0.032 |
0.578 ± 0.503 |
35.31 ± 4.32 |
163.75 ± 2.15 |
| MX1 |
-0.744 ± 0.151 |
-0.611 ± 0.171 |
0.272 ± 0.265 |
15.79 ± 21.03 |
219.39 ± 12.20 |
| MX2 |
-0.907 ± 0.263 |
-0.389 ± 0.585 |
0.163 ± 0.161 |
9.37 ± 31.37 |
203.20 ± 36.90 |
| MX3 |
-0.723 ± 0.162 |
-0.622 ± 0.179 |
0.301 ± 0.291 |
17.49 ± 18.36 |
220.71 ± 13.31 |
| RH08 |
-0.630 ± 0.030 |
0.006 ± 0.052 |
-0.777 ± 0.560 |
-50.94 ± 2.19 |
179.50 ± 4.77 |
| RH09 |
-0.616 ± 0.054 |
0.016 ± 0.070 |
-0.788 ± 0.559 |
-51.97 ± 3.95 |
178.50 ± 6.51 |
| RH10 |
-0.616 ± 0.054 |
0.016 ± 0.070 |
-0.788 ± 0.559 |
-51.97 ± 3.95 |
178.50 ± 6.51 |
| Average |
-0.720 |
-0.246 |
-0.095 |
-7.581 |
195.416 |
| Median |
-0.723 |
0.006 |
0.272 |
15.787 |
203.196 |
| Deviation |
0.100 |
0.350 |
0.583 |
37.211 |
22.984 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
42.9 ± 4.1 |
171.2 ± 7.2 |
0.80 ± 0.05 |
| VC |
11.9 ± 3.2 |
101.2 ± 11.6 |
0.80 ± 0.05 |
| MX1 |
42.8 ± 4.2 |
173.8 ± 7.2 |
0.80 ± 0.05 |
| MX2 |
34.5 ± 5.4 |
220.6 ± 8.4 |
0.80 ± 0.05 |
| MX3 |
43.0 ± 4.0 |
164.8 ± 7.2 |
0.80 ± 0.05 |
| RH08 |
83.9 ± 6.3 |
259.7 ± 3.6 |
0.80 ± 0.05 |
| RH09 |
84.9 ± 6.3 |
257.0 ± 3.6 |
0.80 ± 0.05 |
| RH10 |
84.9 ± 6.3 |
257.0 ± 11.9 |
0.80 ± 0.05 |
| Average |
53.6 |
200.7 |
0.80 |
| Median |
43.0 |
220.6 |
0.80 |
| Deviation |
27.6 |
57.3 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
-79.7 ± 0.9 |
20.5 ± 0.4 |
24.5 ± 0.4 |
48.2 ± 1.3 |
-3.89 ± 0.03 |
-1.65 ± 0.04 |
| VC |
-131.1 ± 1.5 |
31.5 ± 0.4 |
32.7 ± 0.6 |
41.9 ± 1.5 |
-4.17 ± 0.06 |
-3.13 ± 0.11 |
| MX1 |
-79.6 ± 0.9 |
20.5 ± 0.4 |
24.5 ± 0.4 |
48.2 ± 1.3 |
-3.88 ± 0.03 |
-1.65 ± 0.04 |
| MX2 |
-91.4 ± 1.1 |
23.8 ± 0.4 |
27.6 ± 0.5 |
46.7 ± 1.3 |
-3.84 ± 0.03 |
-1.96 ± 0.04 |
| MX3 |
-80.0 ± 0.9 |
20.4 ± 0.4 |
24.4 ± 0.4 |
48.2 ± 1.3 |
-3.92 ± 0.03 |
-1.66 ± 0.04 |
| RH8 |
-4.3 ± 2.2 |
2.7 ± 0.1 |
3.6 ± 0.1 |
52.3 ± 1.3 |
-1.57 ± 0.80 |
-0.08 ± 0.04 |
| RH9 |
-2.5 ± 2.2 |
2.3 ± 0.0 |
3.0 ± 0.1 |
52.3 ± 1.3 |
-1.10 ± 0.96 |
-0.05 ± 0.04 |
| RH10 |
-2.5 ± 2.2 |
2.3 ± 0.0 |
3.0 ± 0.1 |
52.3 ± 1.3 |
-1.10 ± 0.96 |
-0.05 ± 0.04 |
| Average |
-58.9 |
15.5 |
17.9 |
48.8 |
-2.9 |
-1.3 |
| Median |
-79.6 |
20.5 |
24.5 |
48.2 |
-3.8 |
-1.7 |
| Deviation |
49.1 |
11.4 |
12.5 |
3.6 |
1.4 |
1.1 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
-101.9 ± 0.5 |
26.0 ± 0.5 |
46.6 ± 2.1 |
69.9 ± 2.1 |
-3.93 ± 0.06 |
-1.46 ± 0.05 |
| VC |
-168.2 ± 1.3 |
37.7 ± 1.2 |
62.2 ± 2.8 |
64.4 ± 2.7 |
-4.47 ± 0.10 |
-2.62 ± 0.13 |
| MX1 |
-101.9 ± 0.5 |
26.0 ± 0.5 |
46.6 ± 2.1 |
69.9 ± 2.1 |
-3.92 ± 0.06 |
-1.46 ± 0.05 |
| MX2 |
-117.9 ± 0.4 |
29.9 ± 0.6 |
52.4 ± 2.4 |
68.3 ± 2.2 |
-3.95 ± 0.08 |
-1.73 ± 0.06 |
| MX3 |
-102.2 ± 0.6 |
25.9 ± 0.5 |
46.5 ± 2.1 |
70.0 ± 2.1 |
-3.95 ± 0.06 |
-1.46 ± 0.05 |
| RH8 |
-5.9 ± 2.3 |
3.5 ± 0.1 |
6.8 ± 0.3 |
74.5 ± 1.8 |
-1.68 ± 0.65 |
-0.08 ± 0.03 |
| RH9 |
-3.6 ± 2.3 |
3.0 ± 0.0 |
5.7 ± 0.3 |
74.5 ± 1.8 |
-1.21 ± 0.78 |
-0.05 ± 0.03 |
| RH10 |
-3.6 ± 2.3 |
3.0 ± 0.0 |
5.7 ± 0.3 |
74.5 ± 1.8 |
-1.21 ± 0.78 |
-0.05 ± 0.03 |
| Average |
-75.6 |
19.4 |
34.0 |
70.8 |
-3.0 |
-1.1 |
| Median |
-101.9 |
26.0 |
46.6 |
70.0 |
-3.9 |
-1.5 |
| Deviation |
62.9 |
14.0 |
23.8 |
3.6 |
1.4 |
1.0 |
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)
| 
