Database: Ace Shock Analysis
Event ID: 19982961233
Observation time: 10/23/1998 296.52352 1233 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
296.523519 |
| Arrival time of shock [seconds of day] |
45232.0 ± 32.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.036 |
| Y GSE location of spacecraft [Re] |
-0.006 |
| Z GSE location of spacecraft [Re] |
-0.001 |
| Upstream plasma points selected for analysis |
0009 |
| Upstream field points selected for analysis |
0041 |
| Downstream plasma points selected for analysis |
0008
|
| Downstream field points selected for analysis |
0039 |
| Minimum chisq/dof for RH8,RH9,RH10 |
9.96, 104.03, 109.56 |
Event added to database
|
Sat Apr 30 21:43:19 2005
|
Event last processed
|
Wed Oct 15 14:43:15 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.008 ± 0.002
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-491.9 ± 3.9 |
-543.2 ± 3.8 |
| Vy GSE [km/s] |
6.6 ± 5.7 |
37.1 ± 5.1 |
| Vz GSE [km/s] |
10.9 ± 4.3 |
-35.6 ± 4.1 |
| Wi [km/s] |
51.2 ± 1.8 |
78.8 ± 1.5 |
| We [km/s] |
1620.4 ± 57.5 |
2490.4 ± 48.6 |
| Ni [n/cc] |
3.6 ± 0.3 |
9.1 ± 0.4 |
| Bx GSE [nT] |
-3.7 ± 0.2 |
-9.1 ± 0.5 |
| By GSE [nT] |
0.1 ± 0.8 |
-0.3 ± 1.1 |
| Bz GSE [nT] |
2.2 ± 0.4 |
-1.2 ± 0.8 |
Plasma Beta
|
1.086 ± 1.170
|
1.416 ± 1.429
|
Sound Speed [km/s]
|
66.02 ± 2.40
|
101.76 ± 2.03
|
Alfven Speed [km/s]
|
49.43 ± 3.55
|
66.46 ± 3.03
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.609 ± 0.110 |
0.014 ± 0.272 |
0.793 ± 0.558 |
52.48 ± 7.94 |
178.67 ± 25.58 |
| VC |
-0.681 ± 0.061 |
0.402 ± 0.085 |
-0.612 ± 0.521 |
-37.74 ± 3.96 |
149.43 ± 6.90 |
| MX1 |
-0.555 ± 0.115 |
-0.182 ± 0.184 |
0.812 ± 0.553 |
54.25 ± 7.29 |
198.13 ± 18.71 |
| MX2 |
-0.665 ± 0.468 |
-0.472 ± 0.597 |
0.579 ± 0.504 |
35.41 ± 27.75 |
215.38 ± 49.54 |
| MX3 |
-0.923 ± 0.461 |
0.354 ± 1.189 |
0.150 ± 0.149 |
8.64 ± 28.19 |
159.02 ± 73.78 |
| RH08 |
-0.423 ± 0.016 |
-0.534 ± 0.015 |
0.732 ± 0.560 |
47.04 ± 0.97 |
231.64 ± 1.49 |
| RH09 |
-0.167 ± 0.070 |
-0.767 ± 0.045 |
0.620 ± 0.525 |
38.32 ± 4.04 |
257.72 ± 5.15 |
| RH10 |
-0.207 ± 0.069 |
-0.757 ± 0.046 |
0.620 ± 0.525 |
38.32 ± 4.04 |
254.71 ± 5.15 |
| Average |
-0.529 |
-0.243 |
0.462 |
29.590 |
205.585 |
| Median |
-0.555 |
-0.182 |
0.620 |
38.324 |
215.376 |
| Deviation |
0.254 |
0.466 |
0.481 |
30.695 |
41.418 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
24.0 ± 6.0 |
300.5 ± 6.2 |
2.50 ± 0.26 |
| VC |
73.3 ± 5.8 |
456.1 ± 10.5 |
2.50 ± 0.26 |
| MX1 |
28.9 ± 5.7 |
256.9 ± 5.6 |
2.50 ± 0.26 |
| MX2 |
31.1 ± 7.3 |
317.6 ± 4.0 |
2.50 ± 0.26 |
| MX3 |
29.5 ± 6.2 |
541.9 ± 8.0 |
2.50 ± 0.26 |
| RH08 |
43.8 ± 6.6 |
165.0 ± 5.1 |
2.50 ± 0.26 |
| RH09 |
63.6 ± 6.8 |
11.1 ± 6.3 |
2.50 ± 0.26 |
| RH10 |
61.3 ± 6.9 |
34.5 ± 6.1 |
2.50 ± 0.26 |
| Average |
44.5 |
260.5 |
2.50 |
| Median |
43.8 |
300.5 |
2.50 |
| Deviation |
19.1 |
187.0 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
-7.6 ± 2.5 |
41.9 ± 2.4 |
45.2 ± 3.2 |
71.1 ± 2.3 |
-0.18 ± 0.06 |
-0.11 ± 0.03 |
| VC |
124.1 ± 2.7 |
11.4 ± 0.6 |
14.2 ± 1.0 |
81.7 ± 2.9 |
10.87 ± 0.54 |
1.52 ± 0.05 |
| MX1 |
-23.7 ± 2.8 |
39.3 ± 2.2 |
43.3 ± 3.1 |
72.5 ± 2.4 |
-0.60 ± 0.08 |
-0.33 ± 0.03 |
| MX2 |
-12.3 ± 4.2 |
38.1 ± 2.1 |
42.3 ± 3.0 |
73.2 ± 2.4 |
-0.32 ± 0.11 |
-0.17 ± 0.06 |
| MX3 |
83.1 ± 1.6 |
39.0 ± 2.2 |
43.0 ± 3.1 |
72.7 ± 2.4 |
2.14 ± 0.11 |
1.14 ± 0.04 |
| RH8 |
-46.9 ± 3.8 |
30.7 ± 1.6 |
35.7 ± 2.6 |
76.6 ± 2.6 |
-1.53 ± 0.13 |
-0.61 ± 0.05 |
| RH9 |
-71.9 ± 4.3 |
18.0 ± 0.9 |
22.0 ± 1.6 |
80.5 ± 2.8 |
-4.00 ± 0.26 |
-0.89 ± 0.05 |
| RH10 |
-68.3 ± 4.4 |
19.5 ± 1.0 |
23.7 ± 1.7 |
80.2 ± 2.8 |
-3.51 ± 0.24 |
-0.85 ± 0.05 |
| Average |
-2.9 |
29.8 |
33.7 |
76.1 |
0.4 |
-0.0 |
| Median |
-12.3 |
38.1 |
42.3 |
76.6 |
-0.3 |
-0.2 |
| Deviation |
70.7 |
11.8 |
12.0 |
4.2 |
4.7 |
0.9 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
-3.1 ± 3.7 |
57.8 ± 2.3 |
60.7 ± 2.8 |
107.0 ± 1.8 |
-0.06 ± 0.06 |
-0.03 ± 0.03 |
| VC |
50.0 ± 4.2 |
16.1 ± 0.5 |
19.1 ± 0.9 |
120.5 ± 2.0 |
3.11 ± 0.30 |
0.42 ± 0.04 |
| MX1 |
-9.8 ± 2.9 |
54.4 ± 2.0 |
58.2 ± 2.6 |
108.7 ± 1.8 |
-0.18 ± 0.06 |
-0.09 ± 0.03 |
| MX2 |
-5.8 ± 1.9 |
52.9 ± 2.0 |
56.9 ± 2.6 |
109.5 ± 1.8 |
-0.11 ± 0.03 |
-0.05 ± 0.02 |
| MX3 |
32.6 ± 4.7 |
54.0 ± 2.0 |
57.8 ± 2.6 |
108.9 ± 1.8 |
0.60 ± 0.09 |
0.30 ± 0.04 |
| RH8 |
-19.5 ± 1.9 |
42.9 ± 1.5 |
47.9 ± 2.2 |
113.8 ± 1.9 |
-0.46 ± 0.05 |
-0.17 ± 0.02 |
| RH9 |
-29.7 ± 2.8 |
25.3 ± 0.8 |
29.6 ± 1.3 |
118.9 ± 2.0 |
-1.18 ± 0.11 |
-0.25 ± 0.02 |
| RH10 |
-28.4 ± 2.6 |
27.4 ± 0.9 |
31.9 ± 1.5 |
118.5 ± 2.0 |
-1.04 ± 0.10 |
-0.24 ± 0.02 |
| Average |
-1.7 |
41.3 |
45.3 |
113.2 |
0.1 |
-0.0 |
| Median |
-5.8 |
52.9 |
56.9 |
113.8 |
-0.1 |
-0.1 |
| Deviation |
28.6 |
16.2 |
16.1 |
5.4 |
1.3 |
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)
| 
