Database: Ace Shock Analysis
Event ID: 19983621733
Observation time: 12/28/1998 362.73176 1733 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
362.731759 |
| Arrival time of shock [seconds of day] |
63224.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.035 |
| Y GSE location of spacecraft [Re] |
0.006 |
| Z GSE location of spacecraft [Re] |
-0.001 |
| Upstream plasma points selected for analysis |
0010 |
| Upstream field points selected for analysis |
0038 |
| Downstream plasma points selected for analysis |
0010
|
| Downstream field points selected for analysis |
0044 |
| Minimum chisq/dof for RH8,RH9,RH10 |
7.98, 19.32, 19.77 |
Event added to database
|
Sat Apr 30 21:43:36 2005
|
Event last processed
|
Wed Oct 15 14:48:59 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] |
-382.9 ± 6.8 |
-399.6 ± 3.2 |
| Vy GSE [km/s] |
-9.5 ± 6.3 |
-40.6 ± 4.9 |
| Vz GSE [km/s] |
20.9 ± 2.7 |
15.4 ± 2.5 |
| Wi [km/s] |
31.3 ± 1.6 |
25.6 ± 0.8 |
| We [km/s] |
991.1 ± 51.0 |
810.3 ± 26.2 |
| Ni [n/cc] |
10.3 ± 0.6 |
15.0 ± 0.5 |
| Bx GSE [nT] |
-1.5 ± 1.0 |
-3.5 ± 1.2 |
| By GSE [nT] |
2.7 ± 1.6 |
2.9 ± 1.6 |
| Bz GSE [nT] |
-5.7 ± 1.2 |
-13.6 ± 0.6 |
Plasma Beta
|
0.472 ± 0.476
|
0.103 ± 0.104
|
Sound Speed [km/s]
|
40.47 ± 2.12
|
33.05 ± 1.06
|
Alfven Speed [km/s]
|
45.77 ± 1.32
|
79.72 ± 2.09
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.890 ± 0.473 |
-0.443 ± 0.949 |
0.107 ± 0.107 |
6.17 ± 16.34 |
206.47 ± 61.08 |
| VC |
-0.457 ± 0.179 |
-0.876 ± 0.094 |
-0.152 ± 0.151 |
-8.75 ± 5.66 |
242.46 ± 11.70 |
| MX1 |
-0.402 ± 0.276 |
-0.915 ± 0.121 |
0.044 ± 0.044 |
2.53 ± 12.03 |
246.28 ± 17.26 |
| MX2 |
-0.418 ± 0.175 |
-0.908 ± 0.081 |
0.036 ± 0.036 |
2.07 ± 11.35 |
245.26 ± 11.03 |
| MX3 |
-0.444 ± 0.191 |
-0.895 ± 0.095 |
0.038 ± 0.038 |
2.19 ± 10.90 |
243.65 ± 12.19 |
| RH08 |
-0.957 ± 0.003 |
0.143 ± 0.020 |
0.251 ± 0.246 |
14.56 ± 0.35 |
171.48 ± 1.20 |
| RH09 |
-0.888 ± 0.032 |
-0.351 ± 0.066 |
0.296 ± 0.287 |
17.22 ± 3.98 |
201.56 ± 4.24 |
| RH10 |
-0.901 ± 0.031 |
-0.338 ± 0.066 |
0.274 ± 0.267 |
15.89 ± 4.01 |
200.56 ± 4.20 |
| Average |
-0.670 |
-0.573 |
0.112 |
6.486 |
219.713 |
| Median |
-0.457 |
-0.443 |
0.107 |
6.170 |
242.456 |
| Deviation |
0.257 |
0.389 |
0.154 |
8.901 |
28.403 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
85.7 ± 10.9 |
432.4 ± 2.1 |
1.50 ± 0.10 |
| VC |
82.9 ± 13.4 |
289.2 ± 2.2 |
1.50 ± 0.10 |
| MX1 |
71.2 ± 13.2 |
269.5 ± 2.0 |
1.50 ± 0.10 |
| MX2 |
72.0 ± 13.2 |
275.8 ± 2.0 |
1.50 ± 0.10 |
| MX3 |
72.5 ± 13.2 |
285.8 ± 2.1 |
1.50 ± 0.10 |
| RH08 |
86.8 ± 9.6 |
405.1 ± 1.7 |
1.50 ± 0.10 |
| RH09 |
78.5 ± 10.5 |
423.7 ± 1.9 |
1.50 ± 0.10 |
| RH10 |
80.1 ± 10.4 |
427.9 ± 18.9 |
1.50 ± 0.10 |
| Average |
78.7 |
351.2 |
1.50 |
| Median |
80.1 |
405.1 |
1.50 |
| Deviation |
6.2 |
76.6 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
84.9 ± 8.4 |
2.3 ± 0.1 |
3.4 ± 0.1 |
61.1 ± 1.3 |
37.25 ± 3.71 |
1.39 ± 0.14 |
| VC |
108.6 ± 8.3 |
3.8 ± 0.1 |
5.7 ± 0.2 |
61.0 ± 1.3 |
28.80 ± 2.23 |
1.78 ± 0.14 |
| MX1 |
105.5 ± 8.1 |
9.9 ± 0.3 |
14.8 ± 0.4 |
60.3 ± 1.3 |
10.67 ± 0.82 |
1.75 ± 0.14 |
| MX2 |
105.8 ± 8.1 |
9.5 ± 0.3 |
14.1 ± 0.4 |
60.4 ± 1.3 |
11.19 ± 0.86 |
1.75 ± 0.14 |
| MX3 |
106.2 ± 8.2 |
9.2 ± 0.3 |
13.7 ± 0.4 |
60.4 ± 1.3 |
11.56 ± 0.90 |
1.76 ± 0.14 |
| RH8 |
34.7 ± 5.7 |
1.7 ± 0.0 |
2.5 ± 0.1 |
61.1 ± 1.3 |
20.63 ± 3.41 |
0.57 ± 0.09 |
| RH9 |
73.8 ± 7.7 |
6.1 ± 0.2 |
9.1 ± 0.3 |
60.8 ± 1.3 |
12.15 ± 1.28 |
1.21 ± 0.13 |
| RH10 |
74.0 ± 7.8 |
5.2 ± 0.1 |
7.9 ± 0.2 |
60.9 ± 1.3 |
14.11 ± 1.49 |
1.22 ± 0.13 |
| Average |
86.7 |
5.9 |
8.9 |
60.8 |
18.3 |
1.4 |
| Median |
105.5 |
6.1 |
9.1 |
60.9 |
14.1 |
1.7 |
| Deviation |
25.7 |
3.3 |
4.9 |
0.3 |
9.9 |
0.4 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
57.0 ± 1.6 |
2.3 ± 0.1 |
6.0 ± 0.2 |
86.3 ± 1.9 |
24.83 ± 1.12 |
0.66 ± 0.03 |
| VC |
73.1 ± 3.2 |
3.8 ± 0.1 |
9.9 ± 0.3 |
86.2 ± 1.9 |
19.25 ± 0.96 |
0.85 ± 0.03 |
| MX1 |
70.8 ± 3.4 |
9.9 ± 0.3 |
25.7 ± 0.7 |
85.7 ± 1.9 |
7.15 ± 0.40 |
0.83 ± 0.03 |
| MX2 |
71.0 ± 3.4 |
9.5 ± 0.3 |
24.6 ± 0.6 |
85.8 ± 1.9 |
7.49 ± 0.41 |
0.83 ± 0.03 |
| MX3 |
71.3 ± 3.3 |
9.2 ± 0.3 |
23.9 ± 0.6 |
85.8 ± 1.9 |
7.75 ± 0.41 |
0.83 ± 0.03 |
| RH8 |
24.7 ± 3.8 |
1.7 ± 0.0 |
4.4 ± 0.1 |
86.3 ± 1.9 |
14.56 ± 2.34 |
0.29 ± 0.05 |
| RH9 |
49.9 ± 1.9 |
6.1 ± 0.2 |
15.9 ± 0.4 |
86.1 ± 1.9 |
8.17 ± 0.45 |
0.58 ± 0.03 |
| RH10 |
50.1 ± 2.0 |
5.3 ± 0.1 |
13.8 ± 0.4 |
86.1 ± 1.9 |
9.50 ± 0.52 |
0.58 ± 0.03 |
| Average |
58.5 |
6.0 |
15.5 |
86.0 |
12.3 |
0.7 |
| Median |
70.8 |
6.1 |
15.9 |
86.1 |
9.5 |
0.8 |
| Deviation |
16.8 |
3.3 |
8.5 |
0.2 |
6.6 |
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)
| 
