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Fundamental TechnologiesGalileo Spacecraft Pages |
Appendix B. Coordinate Systems (continued)
B.3 Verification of Results
Calculations of the transformation into JSE and Jupiter magnetic coordinates were compared with output from MAGPAC v5.1. The tables below show the results of the FORTRAN code shown above compared to MAGPAC. The computations described above agreed with the MAGPAC output.
This table shows the position of the sun in JSE coordinates. The results of the transformation from inertial to JSE coordinates shows the x-axis to be the only non-zero component as defined in section B.1.1.
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CALCULATED |
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| Time | X(Rj) | Y(Rj) | Z(Rj) |
| 1994 JUL 15 00:00:00 | 11351.18 | -0.274E-12 | -0.104E-12 |
| 1994 JUL 16 00 00 00 | 11350.80 | 0.652E-13 | 0.0 |
| 1994 JUL 17 00 00 00 | 11350.41 | 0.522E-13 | 0.0 |
| 1994 JUL 18 00 00 00 | 11350.03 | -0.783E-13 | -0.104E-12 |
| 1994 JUL 19 00 00 00 | 11349.65 | 0.130E-12 | 0.522E-13 |
Comparison of calculated Galileo position to position reported by MAGPAC v5.1 for July 15, 1994, through July 22, 1994, in system III magnetic coordinates. Method described in section B.1.2:
|
Time |
Calculated |
MAGPAC v5.1 |
% Error |
||||||
| r(Rj) | long (deg W) |
lat (deg N) |
r(Rj) | long
(deg W) |
lat (deg N) | r | long | lat | |
| 1994 JUL 15 00:00:00 | 3377.100 | -12.940 | 342.896 | 3377.160 | -12.940 | 342.896 | 0.002 | 0 | 0 |
| 1994 JUL 16 00:00:00 | 3371.554 | -1.575 | 134.947 | 3371.613 | -1.575 | 134.947 | 0.002 | 0 | 0 |
| 1994 JUL 17 00:00:00 | 3366.006 | -4.224 | 284.167 | 3366.066 | -4.224 | 284.167 | 0.002 | 0 | 0 |
| 1994 JUL 18 00:00:00 | 3360.456 | -10.934 | 76.652 | 3360.516 | -10.934 | 76.652 | 0.002 | 0 | 0 |
| 1994 JUL 19 00:00:00 | 3354.903 | 3.358 | 226.015 | 3354.963 | 3.358 | 226.015 | 0.002 | 0 | 0 |
| 1994 JUL 20 00:00:00 | 3349.349 | -14.938 | 16.497 | 3349.409 | -14.938 | 16.497 | 0.002 | 0 | 0 |
| 1994 JUL 21 00:00:00 | 3343.794 | 2.578 | 167.333 | 3343.854 | 2.578 | 167.333 | 0.002 | 0 | 0 |
| 1994 JUL 22 00:00:00 | 3338.236 | -9.553 | 316.623 | 3338.296 | -9.553 | 316.624 | 0.002 | 0 | .0003 |
Next: Appendix C. Source Code
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Updated 12/21/04, T. Hunt-Ward
tizby@ftecs.com