Database: Ace Shock Analysis
Event ID: 20012241048
Observation time: 08/12/2001 224.45059 1048 [UT]
|
|
General
Information (About, Top)
| Year |
2001 |
| Fractional day of year |
224.450590 |
| Arrival time of shock [seconds of day] |
38931.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
| X GSE location of spacecraft [Re] |
0.038 |
| Y GSE location of spacecraft [Re] |
-0.005 |
| Z GSE location of spacecraft [Re] |
0.003 |
| Upstream plasma points selected for analysis |
0011 |
| Upstream field points selected for analysis |
0049 |
| Downstream plasma points selected for analysis |
0009
|
| Downstream field points selected for analysis |
0035 |
| Minimum chisq/dof for RH8,RH9,RH10 |
6.67, 18.88, 19.46 |
Event added to database
|
Sat Apr 30 21:51:51 2005
|
Event last processed
|
Tue May 3 14:01:40 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.008 ± 0.002
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-341.7 ± 1.9 |
-393.0 ± 3.8 |
| Vy GSE [km/s] |
14.8 ± 3.6 |
9.7 ± 4.7 |
| Vz GSE [km/s] |
17.5 ± 1.4 |
51.5 ± 4.7 |
| Wi [km/s] |
25.0 ± 1.1 |
38.3 ± 1.6 |
| We [km/s] |
790.6 ± 34.7 |
1211.8 ± 49.8 |
| Ni [n/cc] |
7.3 ± 0.7 |
35.1 ± 3.7 |
| Bx GSE [nT] |
-2.9 ± 0.3 |
2.8 ± 1.3 |
| By GSE [nT] |
-1.7 ± 0.5 |
-9.0 ± 0.6 |
| Bz GSE [nT] |
3.9 ± 0.2 |
6.5 ± 1.6 |
Plasma Beta
|
0.364 ± 0.388
|
0.820 ± 0.829
|
Sound Speed [km/s]
|
32.27 ± 1.42
|
49.47 ± 2.03
|
Alfven Speed [km/s]
|
41.70 ± 3.27
|
42.70 ± 2.94
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.645 ± 0.075 |
-0.241 ± 0.105 |
0.725 ± 0.559 |
46.47 ± 5.40 |
200.48 ± 9.08 |
| VC |
-0.832 ± 0.044 |
-0.082 ± 0.092 |
0.548 ± 0.485 |
33.25 ± 4.49 |
185.61 ± 6.33 |
| MX1 |
-0.665 ± 0.067 |
-0.272 ± 0.084 |
0.696 ± 0.553 |
44.07 ± 5.23 |
202.27 ± 6.93 |
| MX2 |
-0.692 ± 0.062 |
-0.303 ± 0.078 |
0.655 ± 0.540 |
40.91 ± 5.06 |
203.64 ± 6.16 |
| MX3 |
-0.696 ± 0.067 |
-0.307 ± 0.079 |
0.649 ± 0.537 |
40.43 ± 5.61 |
203.80 ± 6.13 |
| RH08 |
-0.749 ± 0.010 |
-0.425 ± 0.009 |
0.508 ± 0.459 |
30.56 ± 1.24 |
209.58 ± 0.52 |
| RH09 |
-0.718 ± 0.049 |
-0.375 ± 0.064 |
0.587 ± 0.508 |
35.92 ± 4.03 |
207.58 ± 4.90 |
| RH10 |
-0.718 ± 0.049 |
-0.375 ± 0.064 |
0.587 ± 0.508 |
35.92 ± 4.03 |
207.58 ± 4.90 |
| Average |
-0.714 |
-0.298 |
0.619 |
38.439 |
202.567 |
| Median |
-0.696 |
-0.303 |
0.649 |
40.430 |
203.795 |
| Deviation |
0.058 |
0.106 |
0.074 |
5.452 |
7.503 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
8.7 ± 2.6 |
303.2 ± 5.2 |
4.83 ± 0.77 |
| VC |
24.6 ± 1.9 |
370.5 ± 5.4 |
4.83 ± 0.77 |
| MX1 |
9.1 ± 2.6 |
309.5 ± 5.0 |
4.83 ± 0.77 |
| MX2 |
10.7 ± 3.1 |
318.2 ± 4.8 |
4.83 ± 0.77 |
| MX3 |
11.1 ± 3.2 |
319.4 ± 4.8 |
4.83 ± 0.77 |
| RH08 |
19.1 ± 5.0 |
331.8 ± 4.3 |
4.83 ± 0.77 |
| RH09 |
14.1 ± 4.5 |
323.7 ± 4.5 |
4.83 ± 0.77 |
| RH10 |
14.1 ± 4.5 |
323.7 ± 4.5 |
4.83 ± 0.77 |
| Average |
13.9 |
325.0 |
4.83 |
| Median |
14.1 |
323.7 |
4.83 |
| Deviation |
5.5 |
20.4 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
73.6 ± 2.4 |
31.4 ± 1.3 |
41.2 ± 3.2 |
42.4 ± 3.1 |
2.35 ± 0.13 |
1.75 ± 0.16 |
| VC |
77.8 ± 2.2 |
27.0 ± 1.1 |
37.9 ± 3.0 |
45.3 ± 2.9 |
2.89 ± 0.16 |
1.72 ± 0.13 |
| MX1 |
74.2 ± 2.5 |
31.3 ± 1.3 |
41.2 ± 3.2 |
42.5 ± 3.1 |
2.38 ± 0.13 |
1.76 ± 0.16 |
| MX2 |
74.7 ± 2.6 |
30.9 ± 1.3 |
41.0 ± 3.2 |
42.7 ± 3.1 |
2.42 ± 0.14 |
1.76 ± 0.16 |
| MX3 |
74.7 ± 2.6 |
30.9 ± 1.3 |
40.9 ± 3.2 |
42.8 ± 3.1 |
2.42 ± 0.14 |
1.76 ± 0.16 |
| RH8 |
73.4 ± 2.9 |
28.7 ± 1.2 |
39.4 ± 3.1 |
44.2 ± 3.0 |
2.56 ± 0.16 |
1.67 ± 0.15 |
| RH9 |
73.7 ± 2.7 |
30.1 ± 1.3 |
40.4 ± 3.2 |
43.3 ± 3.0 |
2.45 ± 0.15 |
1.71 ± 0.16 |
| RH10 |
73.7 ± 2.7 |
30.1 ± 1.3 |
40.4 ± 3.2 |
43.3 ± 3.0 |
2.45 ± 0.15 |
1.71 ± 0.16 |
| Average |
74.5 |
30.1 |
40.3 |
43.3 |
2.5 |
1.7 |
| Median |
74.2 |
30.9 |
40.9 |
43.3 |
2.5 |
1.7 |
| Deviation |
1.4 |
1.5 |
1.1 |
1.0 |
0.2 |
0.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
14.6 ± 3.3 |
40.8 ± 2.1 |
42.2 ± 2.9 |
51.1 ± 1.2 |
0.35 ± 0.07 |
0.28 ± 0.06 |
| VC |
15.9 ± 3.6 |
34.5 ± 1.4 |
38.8 ± 2.7 |
55.6 ± 1.4 |
0.46 ± 0.09 |
0.29 ± 0.06 |
| MX1 |
15.0 ± 3.2 |
40.7 ± 2.1 |
42.2 ± 2.9 |
51.2 ± 1.2 |
0.37 ± 0.07 |
0.29 ± 0.06 |
| MX2 |
15.3 ± 3.2 |
40.1 ± 2.0 |
41.9 ± 2.9 |
51.6 ± 1.2 |
0.38 ± 0.07 |
0.30 ± 0.06 |
| MX3 |
15.2 ± 3.2 |
40.0 ± 2.0 |
41.9 ± 2.9 |
51.7 ± 1.2 |
0.38 ± 0.07 |
0.29 ± 0.06 |
| RH8 |
15.4 ± 3.1 |
36.9 ± 1.6 |
40.4 ± 2.8 |
54.0 ± 1.3 |
0.42 ± 0.07 |
0.28 ± 0.06 |
| RH9 |
14.9 ± 3.1 |
38.9 ± 1.8 |
41.4 ± 2.9 |
52.6 ± 1.2 |
0.38 ± 0.07 |
0.28 ± 0.06 |
| RH10 |
14.9 ± 3.1 |
38.9 ± 1.8 |
41.4 ± 2.9 |
52.6 ± 1.2 |
0.38 ± 0.07 |
0.28 ± 0.06 |
| Average |
15.2 |
38.8 |
41.3 |
52.6 |
0.4 |
0.3 |
| Median |
15.2 |
40.0 |
41.9 |
52.6 |
0.4 |
0.3 |
| Deviation |
0.4 |
2.2 |
1.2 |
1.5 |
0.0 |
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)
| 
