Database: Ace Shock Analysis
Event ID: 19982672313
Observation time: 09/24/1998 267.96764 2313 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
267.967639 |
| Arrival time of shock [seconds of day] |
83604.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
| X GSE location of spacecraft [Re] |
0.038 |
| Y GSE location of spacecraft [Re] |
-0.005 |
| Z GSE location of spacecraft [Re] |
0.002 |
| Upstream plasma points selected for analysis |
0011 |
| Upstream field points selected for analysis |
0043 |
| Downstream plasma points selected for analysis |
0010
|
| Downstream field points selected for analysis |
0040 |
| Minimum chisq/dof for RH8,RH9,RH10 |
16.10, 38.20, 40.28 |
Event added to database
|
Sat Apr 30 21:43:04 2005
|
Event last processed
|
Wed Oct 15 14:37:39 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.005 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-435.6 ± 6.5 |
-598.6 ± 10.9 |
| Vy GSE [km/s] |
25.6 ± 4.6 |
-23.7 ± 6.5 |
| Vz GSE [km/s] |
17.3 ± 10.6 |
-47.2 ± 5.4 |
| Wi [km/s] |
47.1 ± 2.5 |
80.4 ± 2.4 |
| We [km/s] |
1490.1 ± 77.5 |
2542.6 ± 75.1 |
| Ni [n/cc] |
9.9 ± 0.8 |
21.0 ± 2.2 |
| Bx GSE [nT] |
-7.0 ± 1.2 |
-15.8 ± 2.5 |
| By GSE [nT] |
11.9 ± 0.5 |
30.1 ± 3.4 |
| Bz GSE [nT] |
3.4 ± 1.6 |
17.0 ± 2.0 |
Plasma Beta
|
0.233 ± 0.237
|
0.200 ± 0.210
|
Sound Speed [km/s]
|
60.70 ± 3.20
|
103.97 ± 3.08
|
Alfven Speed [km/s]
|
98.19 ± 4.25
|
181.08 ± 11.02
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.848 ± 0.341 |
0.246 ± 0.710 |
-0.469 ± 0.431 |
-27.96 ± 34.78 |
163.83 ± 47.66 |
| VC |
-0.897 ± 0.021 |
-0.269 ± 0.033 |
-0.350 ± 0.335 |
-20.48 ± 3.11 |
196.70 ± 2.05 |
| MX1 |
-0.921 ± 0.031 |
-0.204 ± 0.104 |
-0.332 ± 0.319 |
-19.40 ± 3.59 |
192.48 ± 6.48 |
| MX2 |
-0.922 ± 0.030 |
-0.213 ± 0.093 |
-0.322 ± 0.311 |
-18.80 ± 3.97 |
192.99 ± 5.74 |
| MX3 |
-0.923 ± 0.031 |
-0.217 ± 0.087 |
-0.317 ± 0.306 |
-18.49 ± 4.29 |
193.23 ± 5.38 |
| RH08 |
-0.936 ± 0.003 |
-0.191 ± 0.009 |
-0.296 ± 0.287 |
-17.22 ± 0.55 |
191.53 ± 0.58 |
| RH09 |
-0.996 ± 0.007 |
0.044 ± 0.069 |
-0.084 ± 0.084 |
-4.81 ± 4.02 |
177.49 ± 3.99 |
| RH10 |
-0.996 ± 0.006 |
0.044 ± 0.069 |
-0.073 ± 0.072 |
-4.16 ± 4.03 |
177.49 ± 3.95 |
| Average |
-0.930 |
-0.095 |
-0.280 |
-16.415 |
185.718 |
| Median |
-0.922 |
-0.191 |
-0.317 |
-18.494 |
192.478 |
| Deviation |
0.049 |
0.183 |
0.135 |
8.054 |
11.486 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
59.5 ± 7.3 |
665.3 ± 3.1 |
2.12 ± 0.33 |
| VC |
82.8 ± 6.3 |
726.7 ± 3.8 |
2.12 ± 0.33 |
| MX1 |
78.7 ± 6.3 |
738.6 ± 3.8 |
2.12 ± 0.33 |
| MX2 |
78.9 ± 6.2 |
739.1 ± 3.8 |
2.12 ± 0.33 |
| MX3 |
79.1 ± 6.2 |
739.3 ± 3.8 |
2.12 ± 0.33 |
| RH08 |
77.1 ± 6.2 |
744.8 ± 3.8 |
2.12 ± 0.33 |
| RH09 |
60.1 ± 5.6 |
751.0 ± 3.5 |
2.12 ± 0.33 |
| RH10 |
59.9 ± 5.5 |
750.4 ± 36.4 |
2.12 ± 0.33 |
| Average |
72.0 |
731.9 |
2.12 |
| Median |
78.7 |
739.3 |
2.12 |
| Deviation |
10.2 |
28.0 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
297.4 ± 9.2 |
26.9 ± 0.9 |
49.8 ± 2.2 |
112.4 ± 2.7 |
11.08 ± 0.49 |
2.65 ± 0.07 |
| VC |
348.5 ± 9.7 |
6.5 ± 0.2 |
12.3 ± 0.5 |
115.3 ± 2.6 |
53.81 ± 2.18 |
3.02 ± 0.08 |
| MX1 |
348.2 ± 9.5 |
10.1 ± 0.3 |
19.3 ± 0.8 |
115.1 ± 2.6 |
34.35 ± 1.40 |
3.03 ± 0.08 |
| MX2 |
348.0 ± 9.4 |
9.9 ± 0.3 |
18.8 ± 0.8 |
115.1 ± 2.6 |
35.13 ± 1.43 |
3.02 ± 0.08 |
| MX3 |
347.9 ± 9.4 |
9.8 ± 0.3 |
18.6 ± 0.8 |
115.1 ± 2.6 |
35.50 ± 1.44 |
3.02 ± 0.08 |
| RH8 |
347.0 ± 9.2 |
11.5 ± 0.4 |
21.9 ± 0.9 |
114.9 ± 2.6 |
30.12 ± 1.22 |
3.02 ± 0.07 |
| RH9 |
317.7 ± 7.1 |
26.4 ± 0.8 |
48.9 ± 2.1 |
112.5 ± 2.7 |
12.07 ± 0.51 |
2.82 ± 0.06 |
| RH10 |
316.4 ± 7.0 |
26.5 ± 0.9 |
49.2 ± 2.1 |
112.4 ± 2.7 |
11.94 ± 0.50 |
2.81 ± 0.06 |
| Average |
333.9 |
16.0 |
29.8 |
114.1 |
28.0 |
2.9 |
| Median |
347.9 |
11.5 |
21.9 |
115.1 |
34.3 |
3.0 |
| Deviation |
20.3 |
8.9 |
16.3 |
1.4 |
15.2 |
0.1 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
141.3 ± 9.4 |
46.9 ± 1.3 |
91.8 ± 5.6 |
203.6 ± 9.9 |
3.02 ± 0.25 |
0.70 ± 0.06 |
| VC |
166.8 ± 11.2 |
11.3 ± 0.3 |
22.7 ± 1.4 |
208.6 ± 9.8 |
14.75 ± 1.29 |
0.80 ± 0.07 |
| MX1 |
167.0 ± 11.2 |
17.7 ± 0.5 |
35.5 ± 2.2 |
208.1 ± 9.8 |
9.43 ± 0.82 |
0.80 ± 0.07 |
| MX2 |
166.8 ± 11.2 |
17.3 ± 0.5 |
34.7 ± 2.1 |
208.2 ± 9.8 |
9.64 ± 0.85 |
0.80 ± 0.07 |
| MX3 |
166.7 ± 11.2 |
17.1 ± 0.5 |
34.4 ± 2.1 |
208.2 ± 9.8 |
9.74 ± 0.86 |
0.80 ± 0.07 |
| RH8 |
166.2 ± 11.3 |
20.1 ± 0.6 |
40.3 ± 2.5 |
207.9 ± 9.8 |
8.27 ± 0.73 |
0.80 ± 0.07 |
| RH9 |
152.2 ± 10.8 |
46.0 ± 1.3 |
90.2 ± 5.5 |
203.8 ± 9.9 |
3.32 ± 0.30 |
0.75 ± 0.07 |
| RH10 |
151.6 ± 10.8 |
46.3 ± 1.3 |
90.7 ± 5.5 |
203.7 ± 9.9 |
3.28 ± 0.30 |
0.75 ± 0.07 |
| Average |
159.8 |
27.9 |
55.1 |
206.5 |
7.7 |
0.8 |
| Median |
166.7 |
20.1 |
40.3 |
208.1 |
9.4 |
0.8 |
| Deviation |
10.0 |
15.5 |
30.1 |
2.4 |
4.2 |
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)
| 
