The TAS3 acceleration measurements acquired during the Foton M-2 mission have been
post-processed and analyzed in detail.
Vibration measurements (bandwidth 0.01Hz..200Hz) are available as:
- Time domain data (8GByte data at 1000Hz acquisition rate and summary plots in report)
- Frequency spectrum (FFT analysis presented as waterfall plots, spectrograms and G-RMS plots)
The data analysis report provides mission overview and daily plots for each axis and for the acceleration amplitude.
Performance beyond specifications has been demonstrated by post-processing the data. Low-pass filtered vibration data
(corrected for Earth Magnetic Field disturbance) correlates closely to the quasi-steady acceleration calculated
from the Foton M-2 attitude motion reconstruction (based on magnetometer measurements).
This results in an improved resolution (<0.1µg) within an additional bandwidth (0.1mHz..10mHz)
Preliminary results have been presented during the Foton M-2 Post Flight Review (October 2005).
The full set of calibrated vibration measurement data, the data analysis report and the analysis of
quasi-steady accelerations have been delivered to ESA and are available for distribution.
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Example of time-domain data
(acceleration recorded during full Foton M-2 mission).
(large image) |
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Example of frequency-domain data presented as a spectrogram
(acceleration recorded during full Foton M-2 mission).
(large image) |
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Example of frequency-domain data presented as a waterfall plot
(acceleration recorded during full Foton M-2 mission).
(large image) |
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Example of frequency-domain data presented as a cumulative G-RMS plot
(acceleration recorded during full Foton M-2 mission).
(large image) |
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Example of spectrogram after low-pass filtering (acceleration recorded during full Foton M-2 mission).
The increase in frequency corresponds to the increased spin around the Foton longitudinal axis.
(large image) |
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Example of waterfall plot after low-pass filtering (acceleration recorded during full Foton M-2 mission).
The increase in frequency corresponds to the increased spin around the Foton longitudinal axis.
(large image) |
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During the processing of TAS3 measurement data after the Foton M-2 mission RedShift detected a minor
disturbance on the acceleration data caused by the Earth Magnetic Field. Therefore RedShift decided to implement a tri-axial
magnetometer located close to the acceleration sensors in the DIMAC system.
Example of disturbance correction of low-pass filtered TAS3 vibration data in quasi-steady acceleration range.
(large image) |
Related pages:
DIMAC results (Foton M-3 mission)
TAS3 project
DIMAC FM project
RedShift reference projects
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