Database: Ace Shock Analysis
Event ID: 20020791305
Observation time: 03/20/2002 79.54544 1305 [UT]
|
|
General
Information (About, Top)
| Year |
2002 |
| Fractional day of year |
79.545440 |
| Arrival time of shock [seconds of day] |
47126.0 ± 32.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.035 |
| Y GSE location of spacecraft [Re] |
-0.003 |
| Z GSE location of spacecraft [Re] |
-0.002 |
| Upstream plasma points selected for analysis |
0009 |
| Upstream field points selected for analysis |
0042 |
| Downstream plasma points selected for analysis |
0011
|
| Downstream field points selected for analysis |
0043 |
| Minimum chisq/dof for RH8,RH9,RH10 |
67.10, 77.05, 82.86 |
Event added to database
|
Sun May 1 22:02:57 2005
|
Event last processed
|
Tue May 3 14:16:16 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.003 ± 0.001
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-414.2 ± 4.4 |
-573.2 ± 8.8 |
| Vy GSE [km/s] |
-23.5 ± 4.6 |
89.4 ± 7.2 |
| Vz GSE [km/s] |
-83.0 ± 21.7 |
86.6 ± 20.3 |
| Wi [km/s] |
35.3 ± 5.9 |
73.1 ± 2.9 |
| We [km/s] |
1115.5 ± 187.2 |
2310.1 ± 92.7 |
| Ni [n/cc] |
0.34678 ± 0.05075 |
0.59735 ± 0.04287 |
| Bx GSE [nT] |
6.6 ± 0.2 |
6.6 ± 0.4 |
| By GSE [nT] |
10.9 ± 0.1 |
19.3 ± 0.2 |
| Bz GSE [nT] |
0.5 ± 0.4 |
-2.9 ± 0.6 |
Plasma Beta
|
0.006 ± 0.006
|
0.016 ± 0.017
|
Sound Speed [km/s]
|
45.54 ± 7.64
|
94.31 ± 3.78
|
Alfven Speed [km/s]
|
474.68 ± 35.80
|
582.32 ± 20.80
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.826 ± 0.048 |
-0.209 ± 0.081 |
-0.523 ± 0.469 |
-31.56 ± 4.91 |
194.22 ± 5.60 |
| VC |
-0.618 ± 0.052 |
0.439 ± 0.045 |
0.652 ± 0.538 |
40.69 ± 5.13 |
144.61 ± 2.80 |
| MX1 |
-0.717 ± 0.063 |
0.272 ± 0.072 |
0.642 ± 0.534 |
39.92 ± 5.43 |
159.22 ± 5.52 |
| MX2 |
-0.678 ± 0.061 |
0.286 ± 0.070 |
0.678 ± 0.548 |
42.66 ± 5.04 |
157.15 ± 5.54 |
| MX3 |
-0.631 ± 0.059 |
0.299 ± 0.064 |
0.716 ± 0.557 |
45.72 ± 4.54 |
154.63 ± 5.42 |
| RH08 |
-0.520 ± 0.029 |
0.135 ± 0.020 |
0.844 ± 0.539 |
57.52 ± 2.00 |
165.46 ± 2.00 |
| RH09 |
-0.555 ± 0.060 |
0.134 ± 0.052 |
0.821 ± 0.550 |
55.21 ± 4.22 |
166.46 ± 5.18 |
| RH10 |
-0.587 ± 0.058 |
0.131 ± 0.061 |
0.799 ± 0.557 |
53.02 ± 4.12 |
167.47 ± 5.88 |
| Average |
-0.641 |
0.186 |
0.578 |
37.897 |
163.652 |
| Median |
-0.618 |
0.272 |
0.716 |
45.723 |
165.460 |
| Deviation |
0.098 |
0.192 |
0.452 |
28.867 |
14.472 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
51.1 ± 1.6 |
445.2 ± 49.6 |
1.77 ± 0.35 |
| VC |
85.3 ± 1.5 |
820.8 ± 144.6 |
1.77 ± 0.35 |
| MX1 |
83.5 ± 1.5 |
852.3 ± 142.8 |
1.77 ± 0.35 |
| MX2 |
85.5 ± 1.5 |
838.2 ± 143.0 |
1.77 ± 0.35 |
| MX3 |
87.6 ± 1.6 |
814.2 ± 142.7 |
1.77 ± 0.35 |
| RH08 |
83.1 ± 1.7 |
723.3 ± 133.5 |
1.77 ± 0.35 |
| RH09 |
82.0 ± 1.7 |
744.9 ± 134.7 |
1.77 ± 0.35 |
| RH10 |
80.8 ± 1.7 |
762.7 ± 135.5 |
1.77 ± 0.35 |
| Average |
79.9 |
750.2 |
1.77 |
| Median |
83.5 |
814.2 |
1.77 |
| Deviation |
11.8 |
131.6 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
54.7 ± 10.9 |
28.5 ± 4.7 |
297.8 ± 22.5 |
476.1 ± 35.3 |
1.93 ± 0.33 |
0.12 ± 0.03 |
| VC |
629.2 ± 15.0 |
3.7 ± 0.6 |
38.8 ± 2.9 |
476.9 ± 35.1 |
174.50 ± 31.12 |
1.32 ± 0.09 |
| MX1 |
614.9 ± 14.9 |
5.1 ± 0.8 |
53.5 ± 4.0 |
476.9 ± 35.1 |
123.67 ± 22.10 |
1.29 ± 0.08 |
| MX2 |
620.5 ± 15.6 |
3.6 ± 0.6 |
37.6 ± 2.8 |
476.9 ± 35.1 |
177.29 ± 31.80 |
1.31 ± 0.09 |
| MX3 |
619.3 ± 16.3 |
1.9 ± 0.3 |
19.9 ± 1.5 |
477.0 ± 35.0 |
334.31 ± 60.29 |
1.30 ± 0.09 |
| RH8 |
581.2 ± 18.9 |
5.4 ± 0.9 |
56.8 ± 4.3 |
476.9 ± 35.1 |
110.08 ± 20.38 |
1.22 ± 0.08 |
| RH9 |
586.4 ± 18.5 |
6.3 ± 1.0 |
66.3 ± 5.0 |
476.9 ± 35.1 |
95.13 ± 17.54 |
1.23 ± 0.08 |
| RH10 |
588.9 ± 18.0 |
7.3 ± 1.2 |
76.0 ± 5.7 |
476.9 ± 35.1 |
83.42 ± 15.33 |
1.24 ± 0.08 |
| Average |
536.9 |
7.7 |
80.8 |
476.8 |
137.5 |
1.1 |
| Median |
614.9 |
5.4 |
56.8 |
476.9 |
123.7 |
1.3 |
| Deviation |
195.7 |
8.6 |
89.4 |
0.3 |
96.9 |
0.4 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
35.8 ± 17.9 |
58.7 ± 2.3 |
365.4 ± 13.1 |
587.0 ± 20.5 |
0.62 ± 0.31 |
0.06 ± 0.03 |
| VC |
370.8 ± 11.7 |
7.6 ± 0.3 |
47.6 ± 1.7 |
589.9 ± 20.3 |
48.80 ± 2.09 |
0.63 ± 0.02 |
| MX1 |
361.4 ± 10.2 |
10.5 ± 0.4 |
65.6 ± 2.3 |
589.8 ± 20.3 |
34.49 ± 1.43 |
0.61 ± 0.02 |
| MX2 |
365.6 ± 11.1 |
7.4 ± 0.3 |
46.2 ± 1.6 |
589.9 ± 20.3 |
49.57 ± 2.08 |
0.62 ± 0.02 |
| MX3 |
363.8 ± 12.1 |
3.9 ± 0.2 |
24.4 ± 0.9 |
589.9 ± 20.3 |
93.19 ± 3.99 |
0.62 ± 0.02 |
| RH8 |
340.2 ± 14.5 |
11.1 ± 0.4 |
69.7 ± 2.5 |
589.8 ± 20.3 |
30.55 ± 1.41 |
0.58 ± 0.02 |
| RH9 |
343.9 ± 13.8 |
13.0 ± 0.5 |
81.4 ± 2.9 |
589.8 ± 20.3 |
26.45 ± 1.19 |
0.58 ± 0.02 |
| RH10 |
345.3 ± 13.2 |
14.9 ± 0.6 |
93.2 ± 3.3 |
589.7 ± 20.3 |
23.19 ± 1.02 |
0.59 ± 0.02 |
| Average |
315.8 |
15.9 |
99.2 |
589.5 |
38.4 |
0.5 |
| Median |
361.4 |
11.1 |
69.7 |
589.8 |
34.5 |
0.6 |
| Deviation |
113.7 |
17.6 |
109.7 |
1.0 |
27.0 |
0.2 |
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)
| 
