Database: Ace Shock Analysis
Event ID: 20010231006
Observation time: 01/23/2001 23.42106 1006 [UT]
|
|
General
Information (About, Top)
| Year |
2001 |
| Fractional day of year |
23.421065 |
| Arrival time of shock [seconds of day] |
36380.0 ± 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] |
0.004 |
| Upstream plasma points selected for analysis |
0012 |
| Upstream field points selected for analysis |
0057 |
| Downstream plasma points selected for analysis |
0013
|
| Downstream field points selected for analysis |
0051 |
| Minimum chisq/dof for RH8,RH9,RH10 |
3.37, 8.36, 8.47 |
Event added to database
|
Sat Apr 30 21:49:07 2005
|
Event last processed
|
Tue May 3 13:48:05 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.007 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-417.4 ± 4.8 |
-547.7 ± 11.9 |
| Vy GSE [km/s] |
18.0 ± 5.8 |
7.7 ± 10.5 |
| Vz GSE [km/s] |
7.3 ± 4.7 |
-12.9 ± 9.5 |
| Wi [km/s] |
35.2 ± 3.3 |
87.0 ± 2.9 |
| We [km/s] |
1112.5 ± 104.2 |
2752.6 ± 92.7 |
| Ni [n/cc] |
2.7 ± 0.4 |
13.0 ± 0.6 |
| Bx GSE [nT] |
3.5 ± 0.3 |
3.7 ± 1.8 |
| By GSE [nT] |
0.6 ± 0.7 |
-1.1 ± 2.3 |
| Bz GSE [nT] |
1.3 ± 0.4 |
3.8 ± 0.8 |
Plasma Beta
|
0.529 ± 0.462
|
6.254 ± 5.900
|
Sound Speed [km/s]
|
45.42 ± 4.25
|
112.38 ± 3.79
|
Alfven Speed [km/s]
|
51.76 ± 8.12
|
36.68 ± 7.62
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.965 ± 0.099 |
-0.190 ± 0.396 |
-0.180 ± 0.178 |
-10.35 ± 19.71 |
191.13 ± 23.47 |
| VC |
-0.985 ± 0.014 |
-0.078 ± 0.084 |
-0.155 ± 0.154 |
-8.93 ± 4.75 |
184.50 ± 4.88 |
| MX1 |
-0.994 ± 0.062 |
-0.059 ± 0.640 |
-0.097 ± 0.097 |
-5.56 ± 29.33 |
183.40 ± 36.89 |
| MX2 |
-0.993 ± 0.041 |
-0.099 ± 0.349 |
-0.066 ± 0.066 |
-3.77 ± 19.14 |
185.68 ± 20.15 |
| MX3 |
-0.992 ± 0.043 |
-0.102 ± 0.369 |
-0.069 ± 0.069 |
-3.98 ± 16.84 |
185.89 ± 21.30 |
| RH08 |
-0.995 ± 0.001 |
0.009 ± 0.009 |
-0.095 ± 0.095 |
-5.45 ± 0.67 |
179.50 ± 0.52 |
| RH09 |
-0.993 ± 0.008 |
0.009 ± 0.070 |
-0.117 ± 0.117 |
-6.74 ± 4.01 |
179.50 ± 4.07 |
| RH10 |
-0.993 ± 0.008 |
0.009 ± 0.070 |
-0.117 ± 0.117 |
-6.74 ± 4.01 |
179.50 ± 4.07 |
| Average |
-0.989 |
-0.063 |
-0.112 |
-6.440 |
183.637 |
| Median |
-0.993 |
-0.059 |
-0.097 |
-5.562 |
184.501 |
| Deviation |
0.010 |
0.070 |
0.040 |
2.287 |
4.099 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
14.7 ± 4.4 |
563.3 ± 16.8 |
5.01 ± 0.78 |
| VC |
15.4 ± 6.6 |
575.3 ± 16.7 |
5.01 ± 0.78 |
| MX1 |
18.2 ± 6.8 |
579.9 ± 16.8 |
5.01 ± 0.78 |
| MX2 |
19.4 ± 5.8 |
578.4 ± 17.0 |
5.01 ± 0.78 |
| MX3 |
19.2 ± 5.7 |
578.1 ± 17.0 |
5.01 ± 0.78 |
| RH08 |
19.2 ± 8.3 |
582.4 ± 16.6 |
5.01 ± 0.78 |
| RH09 |
18.2 ± 8.4 |
581.4 ± 16.6 |
5.01 ± 0.78 |
| RH10 |
18.2 ± 8.4 |
581.4 ± 16.6 |
5.01 ± 0.78 |
| Average |
17.8 |
577.5 |
5.01 |
| Median |
18.2 |
579.9 |
5.01 |
| Deviation |
1.8 |
6.2 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
165.2 ± 3.8 |
39.5 ± 2.6 |
50.1 ± 7.9 |
56.9 ± 4.2 |
4.20 ± 0.33 |
2.92 ± 0.25 |
| VC |
166.8 ± 4.2 |
39.3 ± 2.6 |
49.9 ± 7.8 |
57.0 ± 4.2 |
4.26 ± 0.33 |
2.94 ± 0.26 |
| MX1 |
166.9 ± 4.4 |
38.2 ± 2.5 |
49.2 ± 7.7 |
57.8 ± 4.1 |
4.39 ± 0.33 |
2.91 ± 0.25 |
| MX2 |
166.2 ± 4.4 |
37.7 ± 2.4 |
48.8 ± 7.7 |
58.1 ± 4.1 |
4.43 ± 0.33 |
2.88 ± 0.24 |
| MX3 |
166.2 ± 4.4 |
37.8 ± 2.4 |
48.9 ± 7.7 |
58.1 ± 4.1 |
4.42 ± 0.33 |
2.88 ± 0.25 |
| RH8 |
167.4 ± 4.7 |
37.8 ± 2.4 |
48.9 ± 7.7 |
58.0 ± 4.1 |
4.45 ± 0.34 |
2.90 ± 0.25 |
| RH9 |
167.6 ± 4.6 |
38.2 ± 2.5 |
49.2 ± 7.7 |
57.8 ± 4.1 |
4.40 ± 0.34 |
2.92 ± 0.25 |
| RH10 |
167.6 ± 4.6 |
38.2 ± 2.5 |
49.2 ± 7.7 |
57.8 ± 4.1 |
4.40 ± 0.34 |
2.92 ± 0.25 |
| Average |
166.7 |
38.3 |
49.3 |
57.7 |
4.4 |
2.9 |
| Median |
166.9 |
38.2 |
49.2 |
57.8 |
4.4 |
2.9 |
| Deviation |
0.9 |
0.7 |
0.5 |
0.5 |
0.1 |
0.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
33.8 ± 11.9 |
35.3 ± 7.3 |
35.5 ± 7.4 |
112.8 ± 3.8 |
0.96 ± 0.29 |
0.30 ± 0.10 |
| VC |
34.6 ± 11.7 |
35.2 ± 7.2 |
35.4 ± 7.3 |
112.9 ± 3.9 |
0.98 ± 0.27 |
0.30 ± 0.10 |
| MX1 |
35.0 ± 11.8 |
34.6 ± 7.1 |
34.9 ± 7.2 |
113.1 ± 3.9 |
1.01 ± 0.28 |
0.31 ± 0.10 |
| MX2 |
34.5 ± 12.0 |
34.3 ± 7.0 |
34.6 ± 7.2 |
113.1 ± 3.9 |
1.01 ± 0.29 |
0.30 ± 0.10 |
| MX3 |
34.5 ± 12.0 |
34.4 ± 7.0 |
34.6 ± 7.2 |
113.1 ± 3.9 |
1.00 ± 0.29 |
0.30 ± 0.10 |
| RH8 |
35.9 ± 11.6 |
34.4 ± 7.0 |
34.6 ± 7.2 |
113.1 ± 3.9 |
1.05 ± 0.27 |
0.32 ± 0.10 |
| RH9 |
36.0 ± 11.6 |
34.6 ± 7.1 |
34.9 ± 7.2 |
113.1 ± 3.9 |
1.04 ± 0.27 |
0.32 ± 0.09 |
| RH10 |
36.0 ± 11.6 |
34.6 ± 7.1 |
34.9 ± 7.2 |
113.1 ± 3.9 |
1.04 ± 0.27 |
0.32 ± 0.09 |
| Average |
35.0 |
34.7 |
34.9 |
113.0 |
1.0 |
0.3 |
| Median |
35.0 |
34.6 |
34.9 |
113.1 |
1.0 |
0.3 |
| Deviation |
0.8 |
0.4 |
0.3 |
0.1 |
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)
| 
