The Canadian Advanced Nanospace eXperiment 7 (CanX-7) Demonstration Mission: De-Orbiting Nano- and Microspacecraft
Bibliographic record
Abstract
As the number of objects in Earth orbit grows, the international satellite community faces a growing problem associated with orbital debris and space collision avoidance. In September 2007, the Inter-Agency Space Debris Coordination Committee (IADC) recommended that satellites de-orbit within 25 years after the completion of their mission, or within 30 years of launch if they cannot be parked in less dense (“graveyard”) orbits. Governments around the world are introducing procedures to implement the recommendations of the IADC, and consequently, this requirement poses a significant programmatic risk for new space missions, especially those requiring rapid, responsive, short missions in low Earth orbit. Unfortunately for nano- and microsatellites—which are ideally suited for responsive, short missions—no mature de orbiting technology currently exists that is suitable for a wide range of missions and orbits. The CanX-7 (Canadian Advanced Nanosatellite eXperiment-7) mission aims to accomplish a successful demonstration of a low-cost, passive nano- and microsatellite de-orbiting device. Currently under development at the University of Toronto’s Space Flight Laboratory, CanX-7 will employ a lightweight, compact, modular deployable drag sail to de-orbit a demonstrator nanosatellite. The sail design is highly compact, and a variant of this sail can fit onto even the smallest “cubesat”-based platforms. In order to facilitate acceptance and use by the industry, the sail is specifically designed to be minimally intrusive to the operational mission of the hosting satellite. CanX-7 will demonstrate the drag sail’s ability to meet the requirements of the IADC and enable future missions to proceed without delays. A summary of the CanX-7 mission is presented along with the lifetime analysis and innovative features of the sail that make it attractive to future missions – missions that need de-orbiting assistance but that are sensitive to the risk and resource requirements associated with incorporating a de-orbiting device.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 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 | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".