Database: Ace Shock Analysis
Event ID: 19992201744
Observation time: 08/08/1999 220.73941 1744 [UT]
|
|
General
Information (About, Top)
| Year |
1999 |
| Fractional day of year |
220.739410 |
| Arrival time of shock [seconds of day] |
63885.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
| X GSE location of spacecraft [Re] |
0.039 |
| Y GSE location of spacecraft [Re] |
0.001 |
| Z GSE location of spacecraft [Re] |
0.004 |
| Upstream plasma points selected for analysis |
0010 |
| Upstream field points selected for analysis |
0046 |
| Downstream plasma points selected for analysis |
0011
|
| Downstream field points selected for analysis |
0042 |
| Minimum chisq/dof for RH8,RH9,RH10 |
3.72, 9.11, 9.22 |
Event added to database
|
Sat Apr 30 21:44:32 2005
|
Event last processed
|
Wed Oct 15 15:20:12 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.009 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-370.9 ± 1.9 |
-397.6 ± 4.3 |
| Vy GSE [km/s] |
-6.7 ± 5.2 |
-32.5 ± 5.0 |
| Vz GSE [km/s] |
2.0 ± 3.3 |
-3.1 ± 5.1 |
| Wi [km/s] |
26.4 ± 0.5 |
29.9 ± 0.9 |
| We [km/s] |
835.7 ± 14.4 |
944.3 ± 26.9 |
| Ni [n/cc] |
1.7 ± 0.2 |
2.8 ± 0.2 |
| Bx GSE [nT] |
-3.4 ± 0.1 |
-3.5 ± 0.1 |
| By GSE [nT] |
1.9 ± 0.6 |
4.9 ± 0.5 |
| Bz GSE [nT] |
-3.5 ± 0.2 |
-3.6 ± 0.5 |
Plasma Beta
|
0.092 ± 0.094
|
0.112 ± 0.110
|
Sound Speed [km/s]
|
34.21 ± 0.51
|
38.64 ± 1.08
|
Alfven Speed [km/s]
|
87.60 ± 4.51
|
89.65 ± 3.56
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.722 ± 0.084 |
-0.049 ± 0.137 |
-0.690 ± 0.551 |
-43.64 ± 6.98 |
183.89 ± 10.83 |
| VC |
-0.723 ± 0.090 |
-0.681 ± 0.095 |
-0.113 ± 0.113 |
-6.50 ± 8.19 |
223.30 ± 7.48 |
| MX1 |
-0.836 ± 0.078 |
-0.046 ± 0.125 |
-0.546 ± 0.484 |
-33.11 ± 8.21 |
183.18 ± 8.57 |
| MX2 |
-0.907 ± 0.052 |
-0.061 ± 0.114 |
-0.418 ± 0.392 |
-24.69 ± 7.01 |
183.83 ± 7.19 |
| MX3 |
-0.981 ± 0.033 |
-0.074 ± 0.103 |
-0.177 ± 0.175 |
-10.20 ± 10.43 |
184.29 ± 6.01 |
| RH08 |
-0.995 ± 0.001 |
-0.061 ± 0.009 |
0.073 ± 0.072 |
4.16 ± 0.90 |
183.51 ± 0.53 |
| RH09 |
-0.998 ± 0.004 |
-0.061 ± 0.068 |
0.017 ± 0.017 |
0.96 ± 4.05 |
183.51 ± 3.91 |
| RH10 |
-0.998 ± 0.004 |
-0.061 ± 0.068 |
0.017 ± 0.017 |
0.96 ± 4.05 |
183.51 ± 3.91 |
| Average |
-0.895 |
-0.137 |
-0.230 |
-14.006 |
188.627 |
| Median |
-0.907 |
-0.061 |
-0.113 |
-6.495 |
183.826 |
| Deviation |
0.121 |
0.220 |
0.287 |
17.754 |
14.015 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
24.7 ± 6.0 |
327.8 ± 18.8 |
1.74 ± 0.27 |
| VC |
73.2 ± 5.0 |
365.5 ± 25.4 |
1.74 ± 0.27 |
| MX1 |
27.7 ± 4.7 |
375.8 ± 19.3 |
1.74 ± 0.27 |
| MX2 |
33.0 ± 3.8 |
406.1 ± 19.7 |
1.74 ± 0.27 |
| MX3 |
43.9 ± 2.5 |
437.0 ± 19.6 |
1.74 ± 0.27 |
| RH08 |
55.4 ± 1.5 |
439.7 ± 18.6 |
1.74 ± 0.27 |
| RH09 |
52.7 ± 1.7 |
441.3 ± 18.9 |
1.74 ± 0.27 |
| RH10 |
52.7 ± 1.7 |
441.3 ± 18.9 |
1.74 ± 0.27 |
| Average |
45.4 |
404.3 |
1.74 |
| Median |
52.7 |
437.0 |
1.74 |
| Deviation |
16.4 |
43.5 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
60.7 ± 3.2 |
30.6 ± 0.5 |
79.6 ± 4.1 |
88.9 ± 4.4 |
1.99 ± 0.12 |
0.69 ± 0.07 |
| VC |
92.7 ± 4.4 |
9.3 ± 0.1 |
25.3 ± 1.3 |
93.6 ± 4.2 |
10.01 ± 0.57 |
0.99 ± 0.09 |
| MX1 |
66.2 ± 2.9 |
29.7 ± 0.4 |
77.6 ± 4.0 |
89.2 ± 4.4 |
2.23 ± 0.11 |
0.74 ± 0.07 |
| MX2 |
70.1 ± 2.7 |
28.0 ± 0.4 |
73.5 ± 3.8 |
89.8 ± 4.4 |
2.51 ± 0.11 |
0.78 ± 0.07 |
| MX3 |
72.7 ± 2.3 |
23.7 ± 0.4 |
63.1 ± 3.2 |
91.0 ± 4.3 |
3.06 ± 0.12 |
0.80 ± 0.06 |
| RH8 |
70.0 ± 1.9 |
18.4 ± 0.3 |
49.7 ± 2.6 |
92.2 ± 4.3 |
3.79 ± 0.12 |
0.76 ± 0.05 |
| RH9 |
70.7 ± 2.0 |
19.8 ± 0.3 |
53.1 ± 2.7 |
92.0 ± 4.3 |
3.58 ± 0.12 |
0.77 ± 0.06 |
| RH10 |
70.7 ± 2.0 |
19.8 ± 0.3 |
53.1 ± 2.7 |
92.0 ± 4.3 |
3.58 ± 0.12 |
0.77 ± 0.06 |
| Average |
71.7 |
22.4 |
59.4 |
91.1 |
3.8 |
0.8 |
| Median |
70.7 |
23.7 |
63.1 |
92.0 |
3.6 |
0.8 |
| Deviation |
9.3 |
7.1 |
18.0 |
1.6 |
2.6 |
0.1 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
35.7 ± 5.0 |
34.4 ± 0.9 |
81.4 ± 3.2 |
91.4 ± 3.4 |
1.04 ± 0.16 |
0.39 ± 0.05 |
| VC |
54.1 ± 4.6 |
10.3 ± 0.2 |
25.9 ± 1.0 |
97.1 ± 3.1 |
5.24 ± 0.47 |
0.56 ± 0.04 |
| MX1 |
38.8 ± 4.7 |
33.4 ± 0.8 |
79.4 ± 3.2 |
91.7 ± 3.4 |
1.16 ± 0.15 |
0.42 ± 0.05 |
| MX2 |
41.2 ± 4.4 |
31.4 ± 0.8 |
75.2 ± 3.0 |
92.4 ± 3.3 |
1.31 ± 0.15 |
0.45 ± 0.04 |
| MX3 |
42.7 ± 3.8 |
26.6 ± 0.6 |
64.6 ± 2.6 |
94.0 ± 3.2 |
1.61 ± 0.16 |
0.45 ± 0.04 |
| RH8 |
41.3 ± 3.2 |
20.6 ± 0.5 |
50.9 ± 2.0 |
95.4 ± 3.2 |
2.01 ± 0.17 |
0.43 ± 0.04 |
| RH9 |
41.6 ± 3.3 |
22.1 ± 0.5 |
54.4 ± 2.2 |
95.1 ± 3.2 |
1.89 ± 0.17 |
0.44 ± 0.04 |
| RH10 |
41.6 ± 3.3 |
22.1 ± 0.5 |
54.4 ± 2.2 |
95.1 ± 3.2 |
1.89 ± 0.17 |
0.44 ± 0.04 |
| Average |
42.1 |
25.1 |
60.8 |
94.0 |
2.0 |
0.4 |
| Median |
41.6 |
26.6 |
64.6 |
95.1 |
1.9 |
0.4 |
| Deviation |
5.3 |
8.1 |
18.5 |
2.0 |
1.4 |
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)
| 
