Database: Ace Shock Analysis
Event ID: 19991061035
Observation time: 04/16/1999 106.44142 1035 [UT]
|
|
General
Information (About, Top)
| Year |
1999 |
| Fractional day of year |
106.441424 |
| Arrival time of shock [seconds of day] |
38139.0 ± 32.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.036 |
| Y GSE location of spacecraft [Re] |
-0.005 |
| Z GSE location of spacecraft [Re] |
-0.001 |
| Upstream plasma points selected for analysis |
0008 |
| Upstream field points selected for analysis |
0033 |
| Downstream plasma points selected for analysis |
0010
|
| Downstream field points selected for analysis |
0047 |
| Minimum chisq/dof for RH8,RH9,RH10 |
9.12, 13.82, 14.17 |
Event added to database
|
Sat Apr 30 21:43:55 2005
|
Event last processed
|
Wed Oct 15 14:57:59 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.008 ± 0.001
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-374.6 ± 7.6 |
-427.7 ± 6.7 |
| Vy GSE [km/s] |
-25.9 ± 2.9 |
-6.2 ± 6.4 |
| Vz GSE [km/s] |
20.1 ± 2.3 |
51.0 ± 5.5 |
| Wi [km/s] |
27.0 ± 1.3 |
46.8 ± 6.0 |
| We [km/s] |
853.0 ± 39.9 |
1480.2 ± 189.0 |
| Ni [n/cc] |
4.7 ± 1.4 |
9.3 ± 0.9 |
| Bx GSE [nT] |
-3.9 ± 0.4 |
-2.9 ± 1.1 |
| By GSE [nT] |
5.4 ± 0.4 |
10.2 ± 0.5 |
| Bz GSE [nT] |
-0.1 ± 0.8 |
-1.6 ± 1.7 |
Plasma Beta
|
0.168 ± 0.187
|
0.378 ± 0.369
|
Sound Speed [km/s]
|
35.36 ± 1.77
|
60.33 ± 8.06
|
Alfven Speed [km/s]
|
69.09 ± 11.83
|
77.95 ± 5.31
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.937 ± 0.083 |
0.320 ± 0.211 |
0.142 ± 0.141 |
8.19 ± 17.35 |
161.11 ± 12.91 |
| VC |
-0.819 ± 0.068 |
0.314 ± 0.124 |
0.480 ± 0.439 |
28.67 ± 6.34 |
159.02 ± 8.60 |
| MX1 |
-0.828 ± 0.132 |
0.254 ± 0.261 |
0.500 ± 0.453 |
29.99 ± 12.57 |
162.92 ± 17.90 |
| MX2 |
-0.838 ± 0.102 |
0.278 ± 0.231 |
0.469 ± 0.431 |
27.97 ± 8.69 |
161.64 ± 15.70 |
| MX3 |
-0.849 ± 0.091 |
0.293 ± 0.222 |
0.440 ± 0.409 |
26.08 ± 6.78 |
160.94 ± 14.96 |
| RH08 |
-0.991 ± 0.002 |
0.043 ± 0.014 |
0.128 ± 0.128 |
7.38 ± 0.72 |
177.49 ± 0.83 |
| RH09 |
-0.997 ± 0.005 |
-0.026 ± 0.069 |
0.073 ± 0.072 |
4.16 ± 4.03 |
181.50 ± 3.95 |
| RH10 |
-0.996 ± 0.006 |
-0.009 ± 0.069 |
0.084 ± 0.084 |
4.81 ± 4.02 |
180.50 ± 3.99 |
| Average |
-0.907 |
0.184 |
0.289 |
17.156 |
168.141 |
| Median |
-0.849 |
0.278 |
0.440 |
26.078 |
162.921 |
| Deviation |
0.081 |
0.152 |
0.197 |
11.899 |
9.804 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
37.2 ± 3.6 |
476.2 ± 46.9 |
2.22 ± 1.02 |
| VC |
44.2 ± 5.2 |
448.2 ± 49.3 |
2.22 ± 1.02 |
| MX1 |
47.7 ± 5.2 |
453.4 ± 49.1 |
2.22 ± 1.02 |
| MX2 |
45.7 ± 5.1 |
456.3 ± 49.3 |
2.22 ± 1.02 |
| MX3 |
44.1 ± 5.1 |
459.5 ± 49.3 |
2.22 ± 1.02 |
| RH08 |
52.9 ± 3.4 |
497.0 ± 44.5 |
2.22 ± 1.02 |
| RH09 |
56.5 ± 3.2 |
493.1 ± 42.7 |
2.22 ± 1.02 |
| RH10 |
55.6 ± 3.2 |
494.4 ± 43.1 |
2.22 ± 1.02 |
| Average |
48.0 |
472.3 |
2.22 |
| Median |
47.7 |
476.2 |
2.22 |
| Deviation |
6.6 |
20.4 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
130.6 ± 6.7 |
26.6 ± 1.3 |
55.0 ± 9.4 |
73.0 ± 11.1 |
4.92 ± 0.36 |
1.83 ± 0.32 |
| VC |
139.6 ± 5.9 |
23.6 ± 1.2 |
49.5 ± 8.5 |
74.1 ± 11.0 |
5.94 ± 0.41 |
1.93 ± 0.32 |
| MX1 |
139.7 ± 6.1 |
22.0 ± 1.1 |
46.5 ± 8.0 |
74.6 ± 11.0 |
6.37 ± 0.45 |
1.91 ± 0.31 |
| MX2 |
139.9 ± 6.1 |
22.9 ± 1.1 |
48.3 ± 8.3 |
74.3 ± 11.0 |
6.12 ± 0.43 |
1.92 ± 0.32 |
| MX3 |
140.0 ± 6.2 |
23.6 ± 1.2 |
49.6 ± 8.5 |
74.0 ± 11.0 |
5.94 ± 0.42 |
1.93 ± 0.32 |
| RH8 |
124.3 ± 7.5 |
19.5 ± 1.0 |
41.7 ± 7.1 |
75.3 ± 10.9 |
6.39 ± 0.52 |
1.69 ± 0.29 |
| RH9 |
117.4 ± 7.6 |
17.7 ± 0.9 |
38.1 ± 6.5 |
75.7 ± 10.9 |
6.64 ± 0.57 |
1.59 ± 0.27 |
| RH10 |
119.1 ± 7.6 |
18.2 ± 0.9 |
39.0 ± 6.7 |
75.6 ± 10.9 |
6.56 ± 0.56 |
1.61 ± 0.28 |
| Average |
131.3 |
21.8 |
46.0 |
74.6 |
6.1 |
1.8 |
| Median |
139.6 |
22.9 |
48.3 |
74.6 |
6.4 |
1.9 |
| Deviation |
9.9 |
3.1 |
5.9 |
0.9 |
0.5 |
0.2 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
71.0 ± 5.0 |
41.5 ± 3.7 |
62.1 ± 4.2 |
89.8 ± 2.8 |
1.73 ± 0.21 |
0.79 ± 0.05 |
| VC |
76.0 ± 4.3 |
36.4 ± 3.1 |
55.9 ± 3.8 |
92.0 ± 2.8 |
2.10 ± 0.20 |
0.83 ± 0.04 |
| MX1 |
76.2 ± 4.5 |
33.8 ± 2.8 |
52.4 ± 3.6 |
93.0 ± 2.8 |
2.27 ± 0.20 |
0.82 ± 0.04 |
| MX2 |
76.4 ± 4.4 |
35.3 ± 3.0 |
54.5 ± 3.7 |
92.4 ± 2.8 |
2.18 ± 0.20 |
0.83 ± 0.04 |
| MX3 |
76.5 ± 4.5 |
36.5 ± 3.1 |
56.0 ± 3.8 |
91.9 ± 2.8 |
2.11 ± 0.20 |
0.83 ± 0.04 |
| RH8 |
67.9 ± 5.8 |
29.8 ± 2.4 |
47.0 ± 3.2 |
94.3 ± 2.8 |
2.29 ± 0.26 |
0.72 ± 0.05 |
| RH9 |
63.7 ± 6.2 |
27.0 ± 2.2 |
43.0 ± 2.9 |
95.2 ± 2.8 |
2.37 ± 0.28 |
0.67 ± 0.06 |
| RH10 |
64.8 ± 6.1 |
27.8 ± 2.2 |
44.0 ± 3.0 |
95.0 ± 2.8 |
2.34 ± 0.28 |
0.68 ± 0.06 |
| Average |
71.6 |
33.5 |
51.8 |
92.9 |
2.2 |
0.8 |
| Median |
76.0 |
35.3 |
54.5 |
93.0 |
2.3 |
0.8 |
| Deviation |
5.5 |
5.0 |
6.6 |
1.8 |
0.2 |
0.1 |
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)
| 
