Database: Ace Shock Analysis
Event ID: 20021071020
Observation time: 04/17/2002 107.43095 1020 [UT]
|
|
General
Information (About, Top)
| Year |
2002 |
| Fractional day of year |
107.430949 |
| Arrival time of shock [seconds of day] |
37234.0 ± 26.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.035 |
| Y GSE location of spacecraft [Re] |
0.003 |
| Z GSE location of spacecraft [Re] |
-0.004 |
| Upstream plasma points selected for analysis |
0010 |
| Upstream field points selected for analysis |
0043 |
| Downstream plasma points selected for analysis |
0010
|
| Downstream field points selected for analysis |
0038 |
| Minimum chisq/dof for RH8,RH9,RH10 |
1.80, 3.27, 3.36 |
Event added to database
|
Sun May 1 22:09:04 2005
|
Event last processed
|
Tue May 3 14:19:33 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.008 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-344.7 ± 2.5 |
-449.8 ± 7.2 |
| Vy GSE [km/s] |
-37.0 ± 2.6 |
-29.3 ± 20.9 |
| Vz GSE [km/s] |
-11.2 ± 2.0 |
42.6 ± 7.3 |
| Wi [km/s] |
35.1 ± 1.0 |
57.3 ± 0.9 |
| We [km/s] |
1110.3 ± 30.5 |
1811.5 ± 28.2 |
| Ni [n/cc] |
12.0 ± 0.5 |
51.5 ± 6.9 |
| Bx GSE [nT] |
-1.6 ± 0.8 |
6.0 ± 2.2 |
| By GSE [nT] |
-7.3 ± 0.8 |
-10.8 ± 15.2 |
| Bz GSE [nT] |
-4.6 ± 0.7 |
11.8 ± 12.0 |
Plasma Beta
|
0.401 ± 0.398
|
0.573 ± 0.591
|
Sound Speed [km/s]
|
45.33 ± 1.25
|
73.96 ± 1.15
|
Alfven Speed [km/s]
|
55.59 ± 2.37
|
76.52 ± 6.53
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.849 ± 0.419 |
-0.324 ± 0.958 |
-0.418 ± 0.392 |
-24.72 ± 30.13 |
200.91 ± 64.48 |
| VC |
-0.891 ± 0.031 |
0.062 ± 0.165 |
0.449 ± 0.416 |
26.69 ± 3.63 |
175.99 ± 10.59 |
| MX1 |
-0.939 ± 0.061 |
-0.181 ± 0.238 |
0.292 ± 0.283 |
16.98 ± 8.10 |
190.93 ± 14.50 |
| MX2 |
-0.943 ± 0.030 |
0.025 ± 0.193 |
0.331 ± 0.319 |
19.35 ± 5.09 |
178.46 ± 11.72 |
| MX3 |
-0.939 ± 0.028 |
-0.003 ± 0.166 |
0.344 ± 0.330 |
20.13 ± 4.72 |
180.20 ± 10.13 |
| RH08 |
-0.985 ± 0.004 |
0.060 ± 0.018 |
0.162 ± 0.161 |
9.32 ± 1.19 |
176.49 ± 1.02 |
| RH09 |
-0.970 ± 0.017 |
0.077 ± 0.071 |
0.229 ± 0.225 |
13.24 ± 3.97 |
175.49 ± 4.17 |
| RH10 |
-0.970 ± 0.017 |
0.077 ± 0.071 |
0.229 ± 0.225 |
13.24 ± 3.97 |
175.49 ± 4.17 |
| Average |
-0.936 |
-0.026 |
0.202 |
11.780 |
181.743 |
| Median |
-0.939 |
0.060 |
0.292 |
16.980 |
178.459 |
| Deviation |
0.045 |
0.148 |
0.266 |
15.670 |
9.287 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
50.0 ± 6.6 |
394.7 ± 11.8 |
4.31 ± 0.70 |
| VC |
83.0 ± 4.5 |
454.3 ± 9.0 |
4.31 ± 0.70 |
| MX1 |
80.2 ± 4.5 |
475.1 ± 5.4 |
4.31 ± 0.70 |
| MX2 |
88.9 ± 4.8 |
472.5 ± 7.9 |
4.31 ± 0.70 |
| MX3 |
89.8 ± 4.7 |
472.3 ± 7.4 |
4.31 ± 0.70 |
| RH08 |
87.3 ± 5.5 |
481.3 ± 8.1 |
4.31 ± 0.70 |
| RH09 |
89.8 ± 5.3 |
477.5 ± 8.6 |
4.31 ± 0.70 |
| RH10 |
89.8 ± 5.3 |
477.5 ± 8.6 |
4.31 ± 0.70 |
| Average |
82.3 |
463.1 |
4.31 |
| Median |
88.9 |
475.1 |
4.31 |
| Deviation |
13.6 |
28.8 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
85.5 ± 2.3 |
24.0 ± 0.5 |
35.8 ± 1.5 |
67.6 ± 1.9 |
3.57 ± 0.12 |
1.27 ± 0.04 |
| VC |
154.4 ± 2.7 |
4.3 ± 0.1 |
6.8 ± 0.3 |
71.6 ± 1.9 |
36.12 ± 0.77 |
2.16 ± 0.05 |
| MX1 |
147.9 ± 2.7 |
6.0 ± 0.1 |
9.4 ± 0.4 |
71.5 ± 1.9 |
24.73 ± 0.60 |
2.07 ± 0.05 |
| MX2 |
152.0 ± 2.7 |
0.7 ± 0.0 |
1.1 ± 0.0 |
71.7 ± 1.9 |
216.54 ± 4.73 |
2.12 ± 0.05 |
| MX3 |
152.4 ± 2.7 |
0.1 ± 0.0 |
0.2 ± 0.0 |
71.7 ± 1.9 |
1091.34 ± 24.10 |
2.12 ± 0.05 |
| RH8 |
145.8 ± 2.6 |
1.7 ± 0.0 |
2.6 ± 0.1 |
71.7 ± 1.9 |
87.87 ± 1.91 |
2.03 ± 0.05 |
| RH9 |
148.3 ± 2.6 |
0.1 ± 0.0 |
0.2 ± 0.0 |
71.7 ± 1.9 |
1124.02 ± 24.16 |
2.07 ± 0.05 |
| RH10 |
148.3 ± 2.6 |
0.1 ± 0.0 |
0.2 ± 0.0 |
71.7 ± 1.9 |
1124.02 ± 24.16 |
2.07 ± 0.05 |
| Average |
141.8 |
4.6 |
7.0 |
71.2 |
463.5 |
2.0 |
| Median |
148.3 |
1.7 |
2.6 |
71.7 |
216.5 |
2.1 |
| Deviation |
22.9 |
8.1 |
12.1 |
1.4 |
541.9 |
0.3 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
21.4 ± 10.9 |
36.3 ± 1.4 |
49.2 ± 4.2 |
100.1 ± 4.1 |
0.59 ± 0.31 |
0.21 ± 0.11 |
| VC |
36.1 ± 7.4 |
6.5 ± 0.2 |
9.3 ± 0.8 |
106.3 ± 4.4 |
5.59 ± 1.10 |
0.34 ± 0.07 |
| MX1 |
35.0 ± 6.5 |
9.0 ± 0.3 |
13.0 ± 1.1 |
106.1 ± 4.4 |
3.87 ± 0.71 |
0.33 ± 0.06 |
| MX2 |
34.9 ± 7.1 |
1.1 ± 0.0 |
1.5 ± 0.1 |
106.5 ± 4.4 |
32.91 ± 6.44 |
0.33 ± 0.06 |
| MX3 |
35.3 ± 6.8 |
0.2 ± 0.0 |
0.3 ± 0.0 |
106.5 ± 4.4 |
167.09 ± 31.22 |
0.33 ± 0.06 |
| RH8 |
33.2 ± 7.4 |
2.5 ± 0.1 |
3.6 ± 0.3 |
106.5 ± 4.4 |
13.24 ± 2.91 |
0.31 ± 0.07 |
| RH9 |
33.5 ± 7.6 |
0.2 ± 0.0 |
0.3 ± 0.0 |
106.5 ± 4.4 |
168.00 ± 36.99 |
0.31 ± 0.07 |
| RH10 |
33.5 ± 7.6 |
0.2 ± 0.0 |
0.3 ± 0.0 |
106.5 ± 4.4 |
168.00 ± 36.99 |
0.31 ± 0.07 |
| Average |
32.9 |
7.0 |
9.7 |
105.6 |
69.9 |
0.3 |
| Median |
34.9 |
2.5 |
3.6 |
106.5 |
32.9 |
0.3 |
| Deviation |
4.8 |
12.3 |
16.7 |
2.2 |
81.6 |
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)
| 
