Database: Ace Shock Analysis
Event ID: 19982380620
Observation time: 08/26/1998 238.26453 0620 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
238.264525 |
| Arrival time of shock [seconds of day] |
22855.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.039 |
| Y GSE location of spacecraft [Re] |
0.001 |
| Z GSE location of spacecraft [Re] |
0.004 |
| Upstream plasma points selected for analysis |
0008 |
| Upstream field points selected for analysis |
0036 |
| Downstream plasma points selected for analysis |
0011
|
| Downstream field points selected for analysis |
0050 |
| Minimum chisq/dof for RH8,RH9,RH10 |
6.32, 11.47, 11.66 |
Event added to database
|
Sat Apr 30 21:43:01 2005
|
Event last processed
|
Wed Oct 15 14:34:45 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.006 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-449.7 ± 2.7 |
-601.4 ± 12.1 |
| Vy GSE [km/s] |
23.6 ± 3.4 |
-23.6 ± 6.1 |
| Vz GSE [km/s] |
-25.2 ± 3.3 |
-152.8 ± 20.9 |
| Wi [km/s] |
36.2 ± 1.8 |
76.5 ± 4.1 |
| We [km/s] |
1145.5 ± 57.9 |
2420.2 ± 128.7 |
| Ni [n/cc] |
4.9 ± 0.6 |
15.4 ± 1.0 |
| Bx GSE [nT] |
-3.0 ± 0.6 |
-8.6 ± 5.4 |
| By GSE [nT] |
-0.7 ± 0.9 |
9.2 ± 5.9 |
| Bz GSE [nT] |
4.3 ± 0.3 |
10.5 ± 6.4 |
Plasma Beta
|
0.469 ± 0.498
|
0.551 ± 0.533
|
Sound Speed [km/s]
|
46.69 ± 2.33
|
98.98 ± 5.53
|
Alfven Speed [km/s]
|
53.00 ± 2.63
|
105.30 ± 10.17
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.954 ± 0.188 |
-0.066 ± 1.108 |
0.293 ± 0.285 |
17.06 ± 33.54 |
183.98 ± 66.57 |
| VC |
-0.746 ± 0.065 |
-0.232 ± 0.033 |
-0.625 ± 0.527 |
-38.66 ± 6.16 |
197.29 ± 2.02 |
| MX1 |
-0.815 ± 0.188 |
-0.273 ± 0.190 |
-0.511 ± 0.461 |
-30.75 ± 21.05 |
198.55 ± 12.66 |
| MX2 |
-0.827 ± 0.065 |
-0.133 ± 0.101 |
-0.546 ± 0.484 |
-33.10 ± 6.72 |
189.11 ± 6.95 |
| MX3 |
-0.811 ± 0.055 |
-0.118 ± 0.105 |
-0.574 ± 0.500 |
-35.00 ± 5.29 |
188.28 ± 7.42 |
| RH08 |
-0.924 ± 0.007 |
-0.073 ± 0.018 |
-0.374 ± 0.356 |
-21.98 ± 1.06 |
184.51 ± 1.10 |
| RH09 |
-0.995 ± 0.007 |
0.096 ± 0.067 |
-0.028 ± 0.028 |
-1.60 ± 3.92 |
174.48 ± 3.88 |
| RH10 |
-0.993 ± 0.008 |
0.113 ± 0.067 |
-0.028 ± 0.028 |
-1.60 ± 3.94 |
173.48 ± 3.84 |
| Average |
-0.883 |
-0.086 |
-0.299 |
-18.202 |
186.210 |
| Median |
-0.827 |
-0.073 |
-0.374 |
-21.981 |
188.283 |
| Deviation |
0.095 |
0.138 |
0.336 |
20.314 |
9.220 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
38.3 ± 2.6 |
578.5 ± 25.9 |
3.18 ± 0.62 |
| VC |
87.2 ± 1.7 |
645.4 ± 24.2 |
3.18 ± 0.62 |
| MX1 |
85.0 ± 1.7 |
671.1 ± 23.3 |
3.18 ± 0.62 |
| MX2 |
87.2 ± 1.9 |
679.9 ± 23.5 |
3.18 ± 0.62 |
| MX3 |
89.1 ± 1.9 |
672.3 ± 23.7 |
3.18 ± 0.62 |
| RH08 |
76.5 ± 2.2 |
707.8 ± 22.4 |
3.18 ± 0.62 |
| RH09 |
57.9 ± 3.8 |
670.4 ± 22.0 |
3.18 ± 0.62 |
| RH10 |
58.1 ± 3.9 |
668.3 ± 21.8 |
3.18 ± 0.62 |
| Average |
72.4 |
661.7 |
3.18 |
| Median |
85.0 |
671.1 |
3.18 |
| Deviation |
18.8 |
37.7 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
158.6 ± 3.0 |
30.4 ± 1.2 |
41.6 ± 2.1 |
63.8 ± 2.5 |
5.22 ± 0.26 |
2.49 ± 0.11 |
| VC |
299.6 ± 2.9 |
1.7 ± 0.1 |
2.6 ± 0.1 |
70.6 ± 2.8 |
177.61 ± 7.49 |
4.25 ± 0.17 |
| MX1 |
298.0 ± 2.9 |
3.0 ± 0.1 |
4.6 ± 0.2 |
70.6 ± 2.8 |
98.03 ± 4.16 |
4.23 ± 0.17 |
| MX2 |
297.1 ± 2.8 |
1.7 ± 0.1 |
2.6 ± 0.1 |
70.6 ± 2.8 |
174.08 ± 7.45 |
4.21 ± 0.17 |
| MX3 |
295.9 ± 2.8 |
0.5 ± 0.0 |
0.8 ± 0.0 |
70.7 ± 2.8 |
540.88 ± 23.14 |
4.19 ± 0.17 |
| RH8 |
284.3 ± 2.7 |
8.3 ± 0.3 |
12.4 ± 0.6 |
70.2 ± 2.7 |
34.49 ± 1.50 |
4.06 ± 0.17 |
| RH9 |
220.0 ± 2.5 |
19.3 ± 0.8 |
28.2 ± 1.4 |
68.0 ± 2.7 |
11.39 ± 0.53 |
3.24 ± 0.14 |
| RH10 |
218.3 ± 2.5 |
19.2 ± 0.8 |
28.0 ± 1.4 |
68.0 ± 2.7 |
11.38 ± 0.53 |
3.22 ± 0.14 |
| Average |
259.0 |
10.5 |
15.1 |
69.1 |
131.6 |
3.7 |
| Median |
295.9 |
8.3 |
12.4 |
70.6 |
98.0 |
4.2 |
| Deviation |
53.3 |
11.1 |
15.5 |
2.4 |
180.0 |
0.7 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
46.6 ± 17.1 |
62.4 ± 2.7 |
82.7 ± 8.0 |
130.7 ± 5.9 |
0.75 ± 0.29 |
0.36 ± 0.13 |
| VC |
97.6 ± 7.4 |
3.5 ± 0.1 |
5.1 ± 0.5 |
144.8 ± 6.4 |
28.24 ± 2.47 |
0.68 ± 0.06 |
| MX1 |
97.5 ± 6.8 |
6.2 ± 0.3 |
9.2 ± 0.9 |
144.7 ± 6.4 |
15.66 ± 1.31 |
0.68 ± 0.06 |
| MX2 |
97.2 ± 7.0 |
3.5 ± 0.1 |
5.1 ± 0.5 |
144.8 ± 6.4 |
27.79 ± 2.39 |
0.67 ± 0.06 |
| MX3 |
95.7 ± 7.2 |
1.1 ± 0.0 |
1.6 ± 0.2 |
144.8 ± 6.4 |
85.41 ± 7.49 |
0.66 ± 0.06 |
| RH8 |
93.6 ± 7.7 |
16.9 ± 0.7 |
24.7 ± 2.4 |
143.8 ± 6.3 |
5.55 ± 0.54 |
0.65 ± 0.06 |
| RH9 |
69.6 ± 11.8 |
39.6 ± 1.7 |
56.0 ± 5.4 |
139.3 ± 6.2 |
1.76 ± 0.32 |
0.50 ± 0.09 |
| RH10 |
69.0 ± 11.8 |
39.4 ± 1.7 |
55.7 ± 5.4 |
139.4 ± 6.2 |
1.76 ± 0.32 |
0.50 ± 0.09 |
| Average |
83.3 |
21.6 |
30.0 |
141.5 |
20.9 |
0.6 |
| Median |
95.7 |
16.9 |
24.7 |
144.7 |
15.7 |
0.7 |
| Deviation |
19.3 |
22.8 |
30.7 |
5.0 |
28.4 |
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)
| 
