VHM / FGM Operations - Ulysses
Magnetic Field Investigation (VHM / FGM)
The Magnetic Field (HED) Investigation uses two sensors, a Vector Helium Magnetometer (VHM) and a Fluxgate Magnetomete (FGM), to determine the heliolatitude dependence of the interplanetary magnetic field. For more scientific information, visit the following Magnetometer team website:
Power and Mass Properties
|
The instrument consists of 4 units: |
Power Dissipation |
Mass |
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|
Mean |
Peak |
Heater |
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|
mA |
W |
mA |
W |
mA |
W |
|||
|
HED 1 |
FGM Electronics and DPU |
79.3 |
2.22 |
79.3 |
2.22 |
2.1079 |
||
|
HED 2 |
VHM Electronics |
70.5 |
1.97 |
73.5 |
2.06 |
1.5357 |
||
|
HED 3 |
Fluxgate Magnetometer (VGM) |
0.7 |
0.02 |
0.7 |
0.02 |
0.2973 |
||
|
HED 4 |
Vector Helium Magnetometer (VHM) |
32.5 |
0.91 |
32.5 |
0.91 |
35.7 |
1.0 |
0.8174 |
|
|
HED 1 / HED 2 Harness |
0.0626 |
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|
Total |
|
183.0 |
5.12 |
186.0 |
5.21 |
35.7 |
1.0 |
4.8209 |
Operational issues
Magnetometer calibrations are performed every two weeks.