Database: Ace Shock Analysis
Event ID: 19990480623
Observation time: 02/17/1999 48.26650 0623 [UT]
|
|
General
Information (About, Top)
| Year |
1999 |
| Fractional day of year |
48.266505 |
| Arrival time of shock [seconds of day] |
23026.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.038 |
| Y GSE location of spacecraft [Re] |
0.000 |
| Z GSE location of spacecraft [Re] |
0.004 |
| Upstream plasma points selected for analysis |
0013 |
| Upstream field points selected for analysis |
0053 |
| Downstream plasma points selected for analysis |
0011
|
| Downstream field points selected for analysis |
0046 |
| Minimum chisq/dof for RH8,RH9,RH10 |
3.21, 5.61, 5.68 |
Event added to database
|
Sat Apr 30 21:43:41 2005
|
Event last processed
|
Wed Oct 15 14:49:58 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.007 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-460.2 ± 3.1 |
-497.3 ± 3.7 |
| Vy GSE [km/s] |
-15.0 ± 2.7 |
-13.9 ± 5.3 |
| Vz GSE [km/s] |
-12.8 ± 7.8 |
-11.3 ± 8.1 |
| Wi [km/s] |
21.8 ± 0.9 |
29.1 ± 1.3 |
| We [km/s] |
688.6 ± 28.1 |
919.3 ± 40.6 |
| Ni [n/cc] |
7.7 ± 0.5 |
12.1 ± 1.4 |
| Bx GSE [nT] |
0.7 ± 0.5 |
0.8 ± 0.6 |
| By GSE [nT] |
6.7 ± 0.3 |
11.0 ± 0.7 |
| Bz GSE [nT] |
-2.1 ± 0.9 |
-4.3 ± 1.9 |
Plasma Beta
|
0.160 ± 0.162
|
0.160 ± 0.154
|
Sound Speed [km/s]
|
28.12 ± 1.16
|
37.71 ± 1.60
|
Alfven Speed [km/s]
|
54.60 ± 1.90
|
73.69 ± 4.51
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.986 ± 0.143 |
-0.086 ± 0.964 |
0.142 ± 0.141 |
8.16 ± 46.68 |
184.98 ± 55.99 |
| VC |
-1.000 ± 0.005 |
0.017 ± 0.155 |
0.014 ± 0.014 |
0.82 ± 15.70 |
179.01 ± 8.91 |
| MX1 |
-0.991 ± 0.035 |
0.134 ± 0.259 |
-0.018 ± 0.018 |
-1.04 ± 15.80 |
172.29 ± 14.99 |
| MX2 |
-0.994 ± 0.025 |
0.108 ± 0.219 |
-0.025 ± 0.025 |
-1.46 ± 14.14 |
173.79 ± 12.65 |
| MX3 |
-0.996 ± 0.018 |
0.085 ± 0.187 |
-0.034 ± 0.034 |
-1.96 ± 12.74 |
175.14 ± 10.73 |
| RH08 |
-0.992 ± 0.002 |
-0.061 ± 0.009 |
-0.106 ± 0.106 |
-6.09 ± 0.77 |
183.51 ± 0.54 |
| RH09 |
-0.977 ± 0.015 |
-0.112 ± 0.070 |
-0.184 ± 0.182 |
-10.62 ± 4.00 |
186.52 ± 4.11 |
| RH10 |
-0.979 ± 0.014 |
-0.112 ± 0.069 |
-0.173 ± 0.171 |
-9.97 ± 4.03 |
186.52 ± 4.07 |
| Average |
-0.989 |
-0.003 |
-0.048 |
-2.772 |
180.220 |
| Median |
-0.991 |
0.017 |
-0.025 |
-1.460 |
183.510 |
| Deviation |
0.008 |
0.102 |
0.106 |
6.120 |
5.907 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
77.0 ± 4.1 |
564.5 ± 27.7 |
1.60 ± 0.17 |
| VC |
84.8 ± 3.5 |
572.1 ± 27.6 |
1.60 ± 0.17 |
| MX1 |
88.3 ± 3.6 |
566.6 ± 28.2 |
1.60 ± 0.17 |
| MX2 |
89.6 ± 3.5 |
568.1 ± 27.9 |
1.60 ± 0.17 |
| MX3 |
89.2 ± 3.4 |
569.3 ± 27.6 |
1.60 ± 0.17 |
| RH08 |
82.7 ± 2.6 |
567.8 ± 25.6 |
1.60 ± 0.17 |
| RH09 |
81.4 ± 2.0 |
557.5 ± 24.3 |
1.60 ± 0.17 |
| RH10 |
81.1 ± 2.1 |
558.8 ± 24.4 |
1.60 ± 0.17 |
| Average |
84.3 |
565.6 |
1.60 |
| Median |
84.8 |
567.8 |
1.60 |
| Deviation |
4.5 |
5.1 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
111.3 ± 3.6 |
5.7 ± 0.2 |
12.3 ± 0.4 |
61.2 ± 1.9 |
19.69 ± 1.06 |
1.82 ± 0.07 |
| VC |
112.5 ± 3.2 |
2.3 ± 0.1 |
5.0 ± 0.2 |
61.4 ± 1.9 |
49.27 ± 2.54 |
1.83 ± 0.07 |
| MX1 |
112.4 ± 3.2 |
0.7 ± 0.0 |
1.6 ± 0.1 |
61.4 ± 1.9 |
156.31 ± 8.05 |
1.83 ± 0.07 |
| MX2 |
112.1 ± 3.1 |
0.2 ± 0.0 |
0.4 ± 0.0 |
61.4 ± 1.9 |
695.66 ± 35.70 |
1.83 ± 0.07 |
| MX3 |
111.9 ± 3.1 |
0.3 ± 0.0 |
0.7 ± 0.0 |
61.4 ± 1.9 |
337.93 ± 17.27 |
1.82 ± 0.07 |
| RH8 |
108.8 ± 2.6 |
3.2 ± 0.1 |
7.0 ± 0.2 |
61.3 ± 1.9 |
34.06 ± 1.71 |
1.78 ± 0.07 |
| RH9 |
104.1 ± 2.3 |
3.8 ± 0.1 |
8.2 ± 0.3 |
61.3 ± 1.9 |
27.70 ± 1.40 |
1.70 ± 0.07 |
| RH10 |
104.5 ± 2.4 |
3.9 ± 0.1 |
8.4 ± 0.3 |
61.3 ± 1.9 |
27.14 ± 1.37 |
1.71 ± 0.07 |
| Average |
109.7 |
2.5 |
5.4 |
61.3 |
168.5 |
1.8 |
| Median |
111.9 |
3.2 |
7.0 |
61.4 |
49.3 |
1.8 |
| Deviation |
3.5 |
2.0 |
4.3 |
0.1 |
239.3 |
0.1 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
74.8 ± 4.5 |
7.6 ± 0.2 |
16.6 ± 1.0 |
82.5 ± 3.8 |
9.85 ± 0.48 |
0.91 ± 0.08 |
| VC |
75.5 ± 4.1 |
3.1 ± 0.1 |
6.7 ± 0.4 |
82.8 ± 3.7 |
24.61 ± 1.10 |
0.91 ± 0.08 |
| MX1 |
75.7 ± 4.3 |
1.0 ± 0.0 |
2.1 ± 0.1 |
82.8 ± 3.7 |
78.29 ± 3.76 |
0.92 ± 0.08 |
| MX2 |
75.2 ± 4.2 |
0.2 ± 0.0 |
0.5 ± 0.0 |
82.8 ± 3.7 |
347.45 ± 16.17 |
0.91 ± 0.08 |
| MX3 |
74.9 ± 4.0 |
0.4 ± 0.0 |
1.0 ± 0.1 |
82.8 ± 3.7 |
168.52 ± 7.57 |
0.91 ± 0.08 |
| RH8 |
72.2 ± 3.0 |
4.3 ± 0.1 |
9.4 ± 0.6 |
82.7 ± 3.8 |
16.82 ± 0.60 |
0.87 ± 0.06 |
| RH9 |
68.1 ± 2.3 |
5.0 ± 0.2 |
11.1 ± 0.7 |
82.7 ± 3.8 |
13.49 ± 0.44 |
0.83 ± 0.05 |
| RH10 |
68.5 ± 2.4 |
5.2 ± 0.2 |
11.4 ± 0.7 |
82.7 ± 3.8 |
13.24 ± 0.43 |
0.83 ± 0.05 |
| Average |
73.1 |
3.4 |
7.3 |
82.7 |
84.0 |
0.9 |
| Median |
74.9 |
4.3 |
9.4 |
82.8 |
24.6 |
0.9 |
| Deviation |
3.2 |
2.6 |
5.8 |
0.1 |
119.6 |
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)
| 
