Database: Ace Shock Analysis
Event ID: 20041152316
Observation time: 04/24/2004 115.96995 2316 [UT]
|
|
General
Information (About, Top)
| Year |
2004 |
| Fractional day of year |
115.969948 |
| Arrival time of shock [seconds of day] |
83803.5 ± 20.0 |
| Shock type |
BI |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
237.436 |
| Y GSE location of spacecraft [Re] |
40.434 |
| Z GSE location of spacecraft [Re] |
-21.031 |
| Upstream plasma points selected for analysis |
0004 |
| Upstream field points selected for analysis |
0242 |
| Downstream plasma points selected for analysis |
0003
|
| Downstream field points selected for analysis |
0238 |
| Minimum chisq/dof for RH8,RH9,RH10 |
1.80, 2.40, 3.62 |
Event added to database
|
Wed Oct 15 10:29:01 2014
|
Event last processed
|
Wed Oct 15 11:24:13 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
59.956 ± 10.241
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-462.9 ± 3.2 |
-517.6 ± 3.4 |
| Vy GSE [km/s] |
30.8 ± 12.3 |
67.3 ± 2.2 |
| Vz GSE [km/s] |
-28.5 ± 4.1 |
2.9 ± 7.2 |
| Wi [km/s] |
51.3 ± 3.1 |
58.6 ± 1.8 |
| We [km/s] |
1621.3 ± 97.0 |
1853.5 ± 57.0 |
| Ni [n/cc] |
4.0 ± 0.7 |
3.1 ± 0.5 |
| Bx GSE [nT] |
-4.6 ± 1.0 |
1.3 ± 0.6 |
| By GSE [nT] |
-0.8 ± 1.5 |
-6.4 ± 0.3 |
| Bz GSE [nT] |
5.6 ± 0.1 |
4.2 ± 0.3 |
Plasma Beta
|
0.398 ± 0.422
|
0.374 ± 0.380
|
Sound Speed [km/s]
|
66.19 ± 3.96
|
75.67 ± 2.33
|
Alfven Speed [km/s]
|
81.33 ± 3.97
|
96.87 ± 8.31
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.308 ± 0.044 |
-0.534 ± 0.034 |
0.787 ± 0.559 |
51.95 ± 2.01 |
240.03 ± 4.44 |
| VC |
-0.757 ± 0.071 |
0.491 ± 0.096 |
0.430 ± 0.402 |
25.50 ± 5.79 |
147.03 ± 7.04 |
| MX1 |
-0.536 ± 0.536 |
-0.531 ± 0.539 |
0.656 ± 0.540 |
40.97 ± 32.09 |
224.75 ± 50.53 |
| MX2 |
-0.294 ± 0.048 |
-0.524 ± 0.033 |
0.799 ± 0.557 |
53.07 ± 1.65 |
240.66 ± 5.09 |
| MX3 |
-0.994 ± 0.141 |
-0.102 ± 1.328 |
-0.032 ± 0.032 |
-1.85 ± 57.00 |
185.88 ± 76.54 |
| RH08 |
-0.689 ± 0.026 |
-0.591 ± 0.028 |
-0.419 ± 0.393 |
-24.77 ± 2.60 |
220.61 ± 2.11 |
| RH09 |
-0.689 ± 0.038 |
-0.591 ± 0.041 |
-0.419 ± 0.393 |
-24.77 ± 3.67 |
220.61 ± 3.09 |
| RH10 |
-0.689 ± 0.050 |
-0.591 ± 0.056 |
-0.419 ± 0.393 |
-24.77 ± 3.98 |
220.61 ± 4.37 |
| Average |
-0.620 |
-0.372 |
0.173 |
11.917 |
212.524 |
| Median |
-0.689 |
-0.531 |
0.430 |
25.497 |
220.613 |
| Deviation |
0.234 |
0.385 |
0.556 |
34.955 |
31.380 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
30.3 ± 13.6 |
34.0 ± 94.3 |
0.72 ± 0.13 |
| VC |
41.8 ± 13.8 |
163.0 ± 536.9 |
0.72 ± 0.13 |
| MX1 |
26.3 ± 10.5 |
114.8 ± 155.7 |
0.72 ± 0.13 |
| MX2 |
30.4 ± 13.5 |
27.8 ± 95.0 |
0.72 ± 0.13 |
| MX3 |
53.2 ± 6.2 |
324.7 ± 337.8 |
0.72 ± 0.13 |
| RH08 |
79.9 ± 2.5 |
299.6 ± 17.8 |
0.72 ± 0.13 |
| RH09 |
79.9 ± 2.5 |
299.6 ± 17.8 |
0.72 ± 0.13 |
| RH10 |
79.9 ± 2.5 |
299.6 ± 59.1 |
0.72 ± 0.13 |
| Average |
52.7 |
195.4 |
0.72 |
| Median |
53.2 |
299.6 |
0.72 |
| Deviation |
24.0 |
125.9 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
-69.7 ± 8.3 |
50.6 ± 2.7 |
70.2 ± 3.4 |
91.9 ± 4.5 |
-1.37 ± 0.09 |
-0.76 ± 0.06 |
| VC |
-190.4 ± 7.4 |
41.7 ± 2.2 |
60.7 ± 3.0 |
96.2 ± 4.8 |
-4.58 ± 0.40 |
-1.99 ± 0.17 |
| MX1 |
-98.4 ± 7.4 |
53.5 ± 2.9 |
72.9 ± 3.6 |
90.2 ± 4.4 |
-1.84 ± 0.06 |
-1.09 ± 0.04 |
| MX2 |
-69.5 ± 8.3 |
50.5 ± 2.7 |
70.1 ± 3.4 |
91.9 ± 4.5 |
-1.37 ± 0.09 |
-0.75 ± 0.06 |
| MX3 |
-133.2 ± 2.3 |
32.3 ± 1.7 |
48.7 ± 2.4 |
99.8 ± 5.0 |
-4.13 ± 0.27 |
-1.34 ± 0.08 |
| RH8 |
-13.1 ± 4.5 |
9.0 ± 0.5 |
14.3 ± 0.7 |
104.5 ± 5.2 |
-1.43 ± 0.44 |
-0.12 ± 0.04 |
| RH9 |
-13.1 ± 4.5 |
9.0 ± 0.5 |
14.3 ± 0.7 |
104.5 ± 5.2 |
-1.43 ± 0.44 |
-0.12 ± 0.04 |
| RH10 |
-13.1 ± 4.5 |
9.0 ± 0.5 |
14.3 ± 0.7 |
104.5 ± 5.2 |
-1.43 ± 0.44 |
-0.12 ± 0.04 |
| Average |
-75.1 |
32.0 |
45.7 |
97.9 |
-2.2 |
-0.8 |
| Median |
-69.5 |
41.7 |
60.7 |
99.8 |
-1.4 |
-0.8 |
| Deviation |
64.2 |
20.1 |
27.1 |
6.2 |
1.3 |
0.7 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
-91.7 ± 5.4 |
58.3 ± 0.2 |
83.6 ± 7.2 |
108.3 ± 5.8 |
-1.57 ± 0.09 |
-0.85 ± 0.08 |
| VC |
-263.3 ± 5.9 |
48.2 ± 0.3 |
72.3 ± 6.2 |
113.2 ± 5.5 |
-5.46 ± 0.13 |
-2.33 ± 0.15 |
| MX1 |
-128.9 ± 5.2 |
61.6 ± 0.2 |
86.8 ± 7.5 |
106.5 ± 6.0 |
-2.09 ± 0.08 |
-1.21 ± 0.10 |
| MX2 |
-91.6 ± 5.5 |
58.2 ± 0.2 |
83.6 ± 7.2 |
108.4 ± 5.8 |
-1.57 ± 0.09 |
-0.85 ± 0.08 |
| MX3 |
-182.9 ± 3.2 |
37.4 ± 0.4 |
58.1 ± 5.0 |
117.2 ± 5.3 |
-4.89 ± 0.08 |
-1.56 ± 0.07 |
| RH8 |
-16.1 ± 3.5 |
10.5 ± 0.1 |
17.0 ± 1.5 |
122.6 ± 5.2 |
-1.53 ± 0.31 |
-0.13 ± 0.02 |
| RH9 |
-16.1 ± 3.5 |
10.5 ± 0.1 |
17.0 ± 1.5 |
122.6 ± 5.2 |
-1.53 ± 0.31 |
-0.13 ± 0.02 |
| RH10 |
-16.1 ± 3.5 |
10.5 ± 0.1 |
17.0 ± 1.5 |
122.6 ± 5.2 |
-1.53 ± 0.31 |
-0.13 ± 0.02 |
| Average |
-100.8 |
36.9 |
54.4 |
115.2 |
-2.5 |
-0.9 |
| Median |
-91.6 |
48.2 |
72.3 |
117.2 |
-1.6 |
-0.8 |
| Deviation |
89.1 |
23.1 |
32.3 |
7.0 |
1.7 |
0.8 |
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)
| 
