Database: Ace Shock Analysis
Event ID: 19991450948
Observation time: 05/25/1999 145.40895 0948 [UT]
|
|
General
Information (About, Top)
| Year |
1999 |
| Fractional day of year |
145.408947 |
| Arrival time of shock [seconds of day] |
35333.0 ± 32.0 |
| Shock type |
FR |
| 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] |
-0.004 |
| Upstream plasma points selected for analysis |
0013 |
| Upstream field points selected for analysis |
0052 |
| Downstream plasma points selected for analysis |
0016
|
| Downstream field points selected for analysis |
0064 |
| Minimum chisq/dof for RH8,RH9,RH10 |
3.70, 5.02, 5.07 |
Event added to database
|
Sat Apr 30 21:44:14 2005
|
Event last processed
|
Wed Oct 15 15:00:59 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] |
-498.2 ± 3.0 |
-573.5 ± 2.4 |
| Vy GSE [km/s] |
40.4 ± 6.8 |
21.0 ± 3.0 |
| Vz GSE [km/s] |
17.5 ± 5.6 |
-24.9 ± 6.2 |
| Wi [km/s] |
66.9 ± 1.7 |
50.2 ± 1.4 |
| We [km/s] |
2117.0 ± 54.2 |
1586.9 ± 43.4 |
| Ni [n/cc] |
5.1 ± 0.3 |
2.3 ± 0.1 |
| Bx GSE [nT] |
5.0 ± 0.4 |
4.1 ± 0.1 |
| By GSE [nT] |
-4.7 ± 1.5 |
-0.8 ± 0.2 |
| Bz GSE [nT] |
-5.5 ± 0.7 |
-1.3 ± 0.3 |
Plasma Beta
|
0.624 ± 0.631
|
0.666 ± 0.657
|
Sound Speed [km/s]
|
86.30 ± 2.21
|
64.85 ± 1.74
|
Alfven Speed [km/s]
|
84.78 ± 3.51
|
61.65 ± 1.43
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.990 ± 0.015 |
-0.121 ± 0.091 |
-0.065 ± 0.065 |
-3.73 ± 9.24 |
186.97 ± 5.28 |
| VC |
-0.852 ± 0.044 |
-0.219 ± 0.079 |
-0.475 ± 0.436 |
-28.38 ± 4.88 |
194.44 ± 5.25 |
| MX1 |
-0.972 ± 0.022 |
-0.025 ± 0.113 |
-0.233 ± 0.229 |
-13.49 ± 5.29 |
181.47 ± 6.67 |
| MX2 |
-0.983 ± 0.012 |
-0.062 ± 0.067 |
-0.173 ± 0.171 |
-9.95 ± 3.85 |
183.62 ± 3.89 |
| MX3 |
-0.966 ± 0.031 |
-0.007 ± 0.139 |
-0.260 ± 0.254 |
-15.07 ± 6.74 |
180.43 ± 8.22 |
| RH08 |
-0.984 ± 0.006 |
0.043 ± 0.034 |
-0.173 ± 0.171 |
-9.97 ± 2.00 |
177.49 ± 2.00 |
| RH09 |
-0.991 ± 0.009 |
0.043 ± 0.070 |
-0.128 ± 0.128 |
-7.38 ± 3.69 |
177.49 ± 4.03 |
| RH10 |
-0.991 ± 0.009 |
0.043 ± 0.070 |
-0.128 ± 0.128 |
-7.38 ± 3.71 |
177.49 ± 4.06 |
| Average |
-0.966 |
-0.038 |
-0.205 |
-11.919 |
182.427 |
| Median |
-0.983 |
-0.007 |
-0.173 |
-9.950 |
181.473 |
| Deviation |
0.047 |
0.094 |
0.125 |
7.551 |
5.907 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
62.6 ± 4.3 |
418.1 ± 9.5 |
0.46 ± 0.02 |
| VC |
85.7 ± 2.9 |
331.7 ± 11.9 |
0.46 ± 0.02 |
| MX1 |
66.8 ± 2.8 |
406.0 ± 11.4 |
0.46 ± 0.02 |
| MX2 |
65.3 ± 3.3 |
412.1 ± 10.7 |
0.46 ± 0.02 |
| MX3 |
67.6 ± 2.6 |
402.7 ± 11.7 |
0.46 ± 0.02 |
| RH08 |
61.8 ± 2.7 |
418.5 ± 11.3 |
0.46 ± 0.02 |
| RH09 |
59.7 ± 2.9 |
423.5 ± 10.9 |
0.46 ± 0.02 |
| RH10 |
59.7 ± 2.9 |
423.5 ± 10.9 |
0.46 ± 0.02 |
| Average |
66.2 |
404.5 |
0.46 |
| Median |
65.3 |
418.1 |
0.46 |
| Deviation |
8.5 |
30.4 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
-69.5 ± 2.7 |
28.7 ± 0.8 |
39.0 ± 1.6 |
117.6 ± 3.3 |
-2.43 ± 0.13 |
-0.59 ± 0.03 |
| VC |
-75.9 ± 2.5 |
4.5 ± 0.1 |
6.3 ± 0.3 |
120.9 ± 3.3 |
-16.90 ± 0.85 |
-0.63 ± 0.03 |
| MX1 |
-73.4 ± 3.0 |
24.3 ± 0.7 |
33.3 ± 1.4 |
118.5 ± 3.3 |
-3.03 ± 0.18 |
-0.62 ± 0.04 |
| MX2 |
-72.3 ± 2.8 |
25.9 ± 0.7 |
35.5 ± 1.5 |
118.2 ± 3.3 |
-2.79 ± 0.16 |
-0.61 ± 0.03 |
| MX3 |
-73.7 ± 3.1 |
23.5 ± 0.7 |
32.4 ± 1.3 |
118.7 ± 3.3 |
-3.14 ± 0.19 |
-0.62 ± 0.04 |
| RH8 |
-70.6 ± 3.2 |
29.4 ± 0.8 |
40.0 ± 1.7 |
117.4 ± 3.2 |
-2.40 ± 0.16 |
-0.60 ± 0.04 |
| RH9 |
-69.8 ± 3.2 |
31.6 ± 0.9 |
42.7 ± 1.8 |
116.8 ± 3.2 |
-2.21 ± 0.14 |
-0.60 ± 0.04 |
| RH10 |
-69.8 ± 3.2 |
31.6 ± 0.9 |
42.7 ± 1.8 |
116.8 ± 3.2 |
-2.21 ± 0.14 |
-0.60 ± 0.04 |
| Average |
-71.9 |
24.9 |
34.0 |
118.1 |
-4.4 |
-0.6 |
| Median |
-70.6 |
28.7 |
39.0 |
118.2 |
-2.4 |
-0.6 |
| Deviation |
2.3 |
8.8 |
11.9 |
1.3 |
5.1 |
0.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
-149.2 ± 2.6 |
21.2 ± 0.3 |
28.4 ± 0.7 |
87.0 ± 1.4 |
-7.05 ± 0.11 |
-1.72 ± 0.03 |
| VC |
-164.0 ± 4.2 |
3.3 ± 0.1 |
4.6 ± 0.1 |
89.4 ± 1.5 |
-49.40 ± 1.13 |
-1.83 ± 0.04 |
| MX1 |
-156.7 ± 3.2 |
17.9 ± 0.3 |
24.2 ± 0.6 |
87.7 ± 1.4 |
-8.74 ± 0.16 |
-1.79 ± 0.03 |
| MX2 |
-154.6 ± 3.0 |
19.1 ± 0.3 |
25.8 ± 0.6 |
87.4 ± 1.4 |
-8.08 ± 0.14 |
-1.77 ± 0.03 |
| MX3 |
-157.3 ± 3.3 |
17.4 ± 0.3 |
23.5 ± 0.5 |
87.8 ± 1.4 |
-9.05 ± 0.17 |
-1.79 ± 0.03 |
| RH8 |
-151.0 ± 3.0 |
21.7 ± 0.3 |
29.1 ± 0.7 |
86.8 ± 1.4 |
-6.95 ± 0.12 |
-1.74 ± 0.03 |
| RH9 |
-148.8 ± 2.8 |
23.3 ± 0.4 |
31.1 ± 0.7 |
86.4 ± 1.4 |
-6.38 ± 0.11 |
-1.72 ± 0.03 |
| RH10 |
-148.8 ± 2.8 |
23.3 ± 0.4 |
31.1 ± 0.7 |
86.4 ± 1.4 |
-6.38 ± 0.11 |
-1.72 ± 0.03 |
| Average |
-153.8 |
18.4 |
24.7 |
87.4 |
-12.8 |
-1.8 |
| Median |
-151.0 |
21.2 |
28.4 |
87.4 |
-7.0 |
-1.7 |
| Deviation |
5.4 |
6.5 |
8.6 |
1.0 |
14.8 |
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)
| 
