Database: Ace Shock Analysis
Event ID: 20010981032
Observation time: 04/08/2001 98.43947 1032 [UT]
|
|
General
Information (About, Top)
| Year |
2001 |
| Fractional day of year |
98.439468 |
| Arrival time of shock [seconds of day] |
37970.0 ± 32.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.035 |
| Y GSE location of spacecraft [Re] |
-0.002 |
| Z GSE location of spacecraft [Re] |
-0.003 |
| Upstream plasma points selected for analysis |
0010 |
| Upstream field points selected for analysis |
0039 |
| Downstream plasma points selected for analysis |
0011
|
| Downstream field points selected for analysis |
0043 |
| Minimum chisq/dof for RH8,RH9,RH10 |
8.69, 26.44, 27.40 |
Event added to database
|
Sat Apr 30 21:50:43 2005
|
Event last processed
|
Tue May 3 13:54:30 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.004 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-492.5 ± 5.2 |
-666.0 ± 13.1 |
| Vy GSE [km/s] |
-8.5 ± 5.5 |
-74.3 ± 10.6 |
| Vz GSE [km/s] |
-32.7 ± 5.2 |
-45.8 ± 11.4 |
| Wi [km/s] |
38.1 ± 2.2 |
82.6 ± 4.5 |
| We [km/s] |
1203.7 ± 69.1 |
2612.5 ± 143.1 |
| Ni [n/cc] |
5.5 ± 0.5 |
14.8 ± 2.2 |
| Bx GSE [nT] |
-0.5 ± 0.9 |
-4.9 ± 1.1 |
| By GSE [nT] |
5.8 ± 0.6 |
18.8 ± 1.5 |
| Bz GSE [nT] |
-1.3 ± 1.2 |
0.3 ± 1.8 |
Plasma Beta
|
0.445 ± 0.466
|
0.571 ± 0.580
|
Sound Speed [km/s]
|
49.14 ± 2.82
|
106.65 ± 5.84
|
Alfven Speed [km/s]
|
57.53 ± 3.43
|
111.65 ± 12.93
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.802 ± 0.384 |
-0.397 ± 0.420 |
0.446 ± 0.414 |
26.50 ± 47.77 |
206.30 ± 27.58 |
| VC |
-0.933 ± 0.021 |
-0.353 ± 0.055 |
-0.070 ± 0.070 |
-4.04 ± 3.77 |
200.74 ± 3.35 |
| MX1 |
-0.948 ± 0.026 |
-0.311 ± 0.079 |
-0.070 ± 0.070 |
-4.00 ± 4.49 |
198.14 ± 4.79 |
| MX2 |
-0.948 ± 0.025 |
-0.310 ± 0.075 |
-0.071 ± 0.071 |
-4.06 ± 3.87 |
198.13 ± 4.52 |
| MX3 |
-0.948 ± 0.024 |
-0.311 ± 0.073 |
-0.070 ± 0.069 |
-3.99 ± 3.89 |
198.15 ± 4.44 |
| RH08 |
-0.965 ± 0.002 |
-0.250 ± 0.008 |
-0.073 ± 0.072 |
-4.16 ± 0.52 |
194.54 ± 0.50 |
| RH09 |
-0.990 ± 0.010 |
-0.131 ± 0.068 |
-0.050 ± 0.050 |
-2.88 ± 4.06 |
187.52 ± 3.91 |
| RH10 |
-0.993 ± 0.008 |
-0.113 ± 0.068 |
-0.039 ± 0.039 |
-2.24 ± 4.06 |
186.52 ± 3.91 |
| Average |
-0.941 |
-0.272 |
0.000 |
0.140 |
196.254 |
| Median |
-0.948 |
-0.310 |
-0.070 |
-3.986 |
198.141 |
| Deviation |
0.060 |
0.102 |
0.181 |
10.673 |
6.608 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
65.8 ± 12.0 |
634.3 ± 47.2 |
2.68 ± 0.48 |
| VC |
76.0 ± 6.7 |
757.3 ± 52.9 |
2.68 ± 0.48 |
| MX1 |
78.4 ± 6.9 |
764.9 ± 52.7 |
2.68 ± 0.48 |
| MX2 |
78.5 ± 6.8 |
764.9 ± 52.7 |
2.68 ± 0.48 |
| MX3 |
78.4 ± 6.9 |
764.9 ± 52.7 |
2.68 ± 0.48 |
| RH08 |
81.9 ± 7.0 |
771.3 ± 52.2 |
2.68 ± 0.48 |
| RH09 |
88.3 ± 7.6 |
777.8 ± 50.8 |
2.68 ± 0.48 |
| RH10 |
89.1 ± 7.8 |
778.1 ± 50.5 |
2.68 ± 0.48 |
| Average |
79.5 |
751.7 |
2.68 |
| Median |
78.5 |
764.9 |
2.68 |
| Deviation |
7.3 |
47.9 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
250.3 ± 4.5 |
15.6 ± 0.6 |
23.6 ± 1.4 |
74.1 ± 2.7 |
16.08 ± 0.80 |
3.38 ± 0.16 |
| VC |
292.6 ± 4.8 |
9.1 ± 0.3 |
13.9 ± 0.8 |
75.2 ± 2.7 |
32.28 ± 1.64 |
3.90 ± 0.18 |
| MX1 |
293.0 ± 4.9 |
7.5 ± 0.3 |
11.5 ± 0.7 |
75.4 ± 2.7 |
39.12 ± 1.99 |
3.89 ± 0.19 |
| MX2 |
293.0 ± 4.9 |
7.5 ± 0.3 |
11.5 ± 0.7 |
75.4 ± 2.7 |
39.20 ± 1.99 |
3.89 ± 0.19 |
| MX3 |
293.0 ± 4.9 |
7.5 ± 0.3 |
11.5 ± 0.7 |
75.4 ± 2.7 |
39.10 ± 1.99 |
3.89 ± 0.19 |
| RH8 |
291.3 ± 4.9 |
5.3 ± 0.2 |
8.1 ± 0.5 |
75.5 ± 2.8 |
55.30 ± 2.83 |
3.86 ± 0.19 |
| RH9 |
287.4 ± 5.1 |
1.1 ± 0.0 |
1.7 ± 0.1 |
75.7 ± 2.8 |
254.05 ± 13.06 |
3.80 ± 0.19 |
| RH10 |
286.8 ± 5.1 |
0.6 ± 0.0 |
0.9 ± 0.1 |
75.7 ± 2.8 |
477.42 ± 24.55 |
3.79 ± 0.19 |
| Average |
285.9 |
6.8 |
10.4 |
75.3 |
119.1 |
3.8 |
| Median |
292.6 |
7.5 |
11.5 |
75.4 |
39.2 |
3.9 |
| Deviation |
14.6 |
4.7 |
7.2 |
0.5 |
163.9 |
0.2 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
91.0 ± 13.3 |
32.1 ± 1.7 |
45.7 ± 5.3 |
151.4 ± 9.3 |
2.86 ± 0.53 |
0.61 ± 0.11 |
| VC |
106.6 ± 14.1 |
18.7 ± 1.0 |
27.0 ± 3.1 |
153.6 ± 9.4 |
5.75 ± 0.94 |
0.70 ± 0.12 |
| MX1 |
107.3 ± 14.0 |
15.4 ± 0.8 |
22.4 ± 2.6 |
154.0 ± 9.4 |
7.00 ± 1.14 |
0.70 ± 0.12 |
| MX2 |
107.2 ± 14.0 |
15.4 ± 0.8 |
22.3 ± 2.6 |
154.0 ± 9.4 |
7.01 ± 1.14 |
0.70 ± 0.12 |
| MX3 |
107.3 ± 14.0 |
15.4 ± 0.8 |
22.4 ± 2.6 |
154.0 ± 9.4 |
6.99 ± 1.14 |
0.70 ± 0.12 |
| RH8 |
106.4 ± 13.9 |
10.8 ± 0.6 |
15.8 ± 1.8 |
154.4 ± 9.4 |
9.87 ± 1.61 |
0.69 ± 0.12 |
| RH9 |
106.4 ± 13.6 |
2.3 ± 0.1 |
3.4 ± 0.4 |
154.7 ± 9.4 |
45.95 ± 7.40 |
0.69 ± 0.11 |
| RH10 |
106.7 ± 13.5 |
1.2 ± 0.1 |
1.8 ± 0.2 |
154.7 ± 9.4 |
86.74 ± 13.91 |
0.69 ± 0.11 |
| Average |
104.9 |
13.9 |
20.1 |
153.8 |
21.5 |
0.7 |
| Median |
106.7 |
15.4 |
22.4 |
154.0 |
7.0 |
0.7 |
| Deviation |
5.6 |
9.7 |
13.9 |
1.1 |
29.8 |
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)
| 
