Database: Ace Shock Analysis
Event ID: 20010171531
Observation time: 01/17/2001 17.64700 1531 [UT]
|
|
General
Information (About, Top)
| Year |
2001 |
| Fractional day of year |
17.647002 |
| Arrival time of shock [seconds of day] |
55901.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.038 |
| Y GSE location of spacecraft [Re] |
0.001 |
| Z GSE location of spacecraft [Re] |
0.003 |
| Upstream plasma points selected for analysis |
0011 |
| Upstream field points selected for analysis |
0044 |
| Downstream plasma points selected for analysis |
0007
|
| Downstream field points selected for analysis |
0032 |
| Minimum chisq/dof for RH8,RH9,RH10 |
8.52, 32.14, 38.15 |
Event added to database
|
Sat Apr 30 21:48:54 2005
|
Event last processed
|
Tue May 3 13:47:17 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.009 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-370.3 ± 1.4 |
-409.1 ± 1.2 |
| Vy GSE [km/s] |
10.1 ± 1.0 |
-1.8 ± 2.4 |
| Vz GSE [km/s] |
-3.8 ± 1.1 |
-21.7 ± 0.6 |
| Wi [km/s] |
26.9 ± 0.6 |
37.7 ± 1.1 |
| We [km/s] |
850.2 ± 19.0 |
1190.9 ± 33.3 |
| Ni [n/cc] |
12.5 ± 0.2 |
25.1 ± 0.9 |
| Bx GSE [nT] |
2.7 ± 0.3 |
3.4 ± 0.4 |
| By GSE [nT] |
-1.5 ± 0.2 |
-3.7 ± 0.7 |
| Bz GSE [nT] |
1.3 ± 0.4 |
-1.4 ± 0.7 |
Plasma Beta
|
1.641 ± 1.572
|
2.737 ± 2.611
|
Sound Speed [km/s]
|
34.71 ± 0.78
|
48.62 ± 1.36
|
Alfven Speed [km/s]
|
21.04 ± 0.79
|
23.15 ± 2.45
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.804 ± 0.100 |
0.366 ± 0.150 |
-0.469 ± 0.431 |
-27.97 ± 10.05 |
155.48 ± 10.38 |
| VC |
-0.875 ± 0.021 |
-0.269 ± 0.056 |
-0.403 ± 0.380 |
-23.76 ± 1.89 |
197.12 ± 3.68 |
| MX1 |
-0.896 ± 0.121 |
0.233 ± 0.411 |
-0.378 ± 0.359 |
-22.19 ± 8.85 |
165.43 ± 26.24 |
| MX2 |
-0.967 ± 0.025 |
-0.012 ± 0.103 |
-0.255 ± 0.249 |
-14.76 ± 5.58 |
180.70 ± 6.08 |
| MX3 |
-0.975 ± 0.022 |
-0.099 ± 0.087 |
-0.198 ± 0.196 |
-11.44 ± 5.98 |
185.79 ± 5.10 |
| RH08 |
-0.959 ± 0.002 |
-0.076 ± 0.010 |
-0.274 ± 0.267 |
-15.89 ± 0.38 |
184.51 ± 0.58 |
| RH09 |
-0.638 ± 0.054 |
0.457 ± 0.062 |
-0.620 ± 0.525 |
-38.32 ± 4.01 |
144.40 ± 5.13 |
| RH10 |
-0.968 ± 0.017 |
0.251 ± 0.066 |
0.006 ± 0.006 |
0.32 ± 4.05 |
165.46 ± 3.92 |
| Average |
-0.885 |
0.106 |
-0.324 |
-19.253 |
172.362 |
| Median |
-0.896 |
0.233 |
-0.274 |
-15.887 |
180.700 |
| Deviation |
0.117 |
0.256 |
0.189 |
11.614 |
17.619 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
10.3 ± 4.7 |
373.2 ± 4.1 |
2.01 ± 0.07 |
| VC |
43.5 ± 4.6 |
410.6 ± 4.2 |
2.01 ± 0.07 |
| MX1 |
15.8 ± 5.9 |
413.1 ± 4.2 |
2.01 ± 0.07 |
| MX2 |
30.7 ± 6.6 |
443.1 ± 4.2 |
2.01 ± 0.07 |
| MX3 |
36.4 ± 6.8 |
445.6 ± 4.2 |
2.01 ± 0.07 |
| RH08 |
33.8 ± 6.2 |
440.9 ± 4.2 |
2.01 ± 0.07 |
| RH09 |
16.5 ± 7.7 |
303.8 ± 3.8 |
2.01 ± 0.07 |
| RH10 |
28.2 ± 9.0 |
430.0 ± 4.3 |
2.01 ± 0.07 |
| Average |
26.9 |
407.5 |
2.01 |
| Median |
30.7 |
430.0 |
2.01 |
| Deviation |
11.6 |
48.3 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
70.2 ± 1.3 |
20.5 ± 0.8 |
20.7 ± 0.8 |
35.0 ± 0.8 |
3.43 ± 0.17 |
2.01 ± 0.05 |
| VC |
87.9 ± 1.1 |
13.9 ± 0.4 |
15.3 ± 0.6 |
38.1 ± 0.7 |
6.33 ± 0.24 |
2.31 ± 0.06 |
| MX1 |
77.4 ± 1.3 |
19.8 ± 0.7 |
20.2 ± 0.8 |
35.4 ± 0.7 |
3.91 ± 0.18 |
2.19 ± 0.06 |
| MX2 |
84.2 ± 1.3 |
17.0 ± 0.5 |
18.1 ± 0.7 |
36.8 ± 0.7 |
4.95 ± 0.21 |
2.29 ± 0.06 |
| MX3 |
84.8 ± 1.3 |
15.7 ± 0.5 |
16.9 ± 0.6 |
37.4 ± 0.7 |
5.41 ± 0.23 |
2.27 ± 0.06 |
| RH8 |
85.6 ± 1.3 |
16.3 ± 0.5 |
17.5 ± 0.7 |
37.2 ± 0.7 |
5.25 ± 0.22 |
2.30 ± 0.06 |
| RH9 |
60.7 ± 1.2 |
19.7 ± 0.7 |
20.2 ± 0.8 |
35.5 ± 0.7 |
3.08 ± 0.14 |
1.71 ± 0.04 |
| RH10 |
69.1 ± 1.5 |
17.6 ± 0.6 |
18.6 ± 0.7 |
36.6 ± 0.7 |
3.93 ± 0.19 |
1.89 ± 0.06 |
| Average |
77.5 |
17.6 |
18.4 |
36.5 |
4.5 |
2.1 |
| Median |
84.2 |
17.6 |
18.6 |
36.8 |
4.9 |
2.3 |
| Deviation |
9.9 |
2.3 |
1.9 |
1.1 |
1.1 |
0.2 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
35.0 ± 1.6 |
22.7 ± 2.4 |
22.8 ± 2.4 |
48.8 ± 1.4 |
1.55 ± 0.13 |
0.72 ± 0.04 |
| VC |
43.6 ± 0.7 |
15.9 ± 1.5 |
16.8 ± 1.8 |
51.5 ± 1.5 |
2.77 ± 0.30 |
0.85 ± 0.02 |
| MX1 |
38.7 ± 1.4 |
22.0 ± 2.3 |
22.3 ± 2.4 |
49.1 ± 1.4 |
1.77 ± 0.15 |
0.79 ± 0.04 |
| MX2 |
42.0 ± 1.1 |
19.2 ± 1.9 |
19.9 ± 2.1 |
50.3 ± 1.4 |
2.20 ± 0.21 |
0.83 ± 0.03 |
| MX3 |
42.2 ± 1.0 |
17.8 ± 1.7 |
18.6 ± 2.0 |
50.8 ± 1.4 |
2.39 ± 0.23 |
0.83 ± 0.03 |
| RH8 |
42.6 ± 1.0 |
18.5 ± 1.8 |
19.2 ± 2.0 |
50.6 ± 1.4 |
2.32 ± 0.23 |
0.84 ± 0.03 |
| RH9 |
30.2 ± 1.6 |
21.9 ± 2.3 |
22.2 ± 2.3 |
49.2 ± 1.4 |
1.39 ± 0.10 |
0.62 ± 0.04 |
| RH10 |
34.6 ± 1.6 |
19.8 ± 2.0 |
20.4 ± 2.2 |
50.1 ± 1.4 |
1.76 ± 0.13 |
0.69 ± 0.04 |
| Average |
38.6 |
19.7 |
20.3 |
50.1 |
2.0 |
0.8 |
| Median |
42.0 |
19.8 |
20.4 |
50.3 |
2.2 |
0.8 |
| Deviation |
4.8 |
2.4 |
2.1 |
0.9 |
0.5 |
0.1 |
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)
| 
