Horizontally-Configured Ground-Test Method for Tethered Satellites
Bibliographic record
Abstract
Two configurations of ground tests may be envisaged to provide experimental data to enhance dynamic modelling of tethered satellite configurations: (a) a vertically suspended tether and (b) a horizontally suspended tether. This paper describes the design and implementation of the horizontal configuration used during design of the BOLAS (Bi-static Observations with Low-Altitude Satellites) rotating tethered satellite configuration. The merits of the horizontal and vertical configurations, in the context of rotating tethered satellites, are compared. Large-scale, room-temperature experimental tests emulating the in-orbit dynamic state are described, in which a SPECTRA-1000®/acrylic tether is suspended horizontally and attached to a pendulum-supported sub-satellite mass. Tension variation due to gravitational cable sag effects is reduced by supporting the tether at intermediate points. The stiffness and structural damping properties are deduced from a cable model that accounts for tether tension variation due to gravitational cable sag effects. Small-scale laboratory tests of tether samples at cryogenic temperatures are conducted to establish the temperature dependence of the tether-material properties. Tether stiffness and damping properties at orbital temperatures are estimated using the experimental data from both large- and small-scale tests. The in-orbit loss of rotation rate of the BOLAS mission due to the gravity-gradient-induced longitudinal stretching of the tether is estimated by applying the experimentally determined tether stiffness and damping properties to previously determined equations of orbital motion.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".