Astronomy & space · University
Space missions, communications and measurement · revision notes
A mission trades measurement goals against mass, power, thermal control, communications and trajectory constraints. No single orbit is best for every goal.
Key ideas and conditions
Mission design
A mission trades measurement goals against mass, power, thermal control, communications and trajectory constraints. No single orbit is best for every goal.
Communications
Signals travel at finite speed. One-way delay differs from round-trip delay, and data rate differs from propagation speed.
Remote sensing
An instrument measures a physical signal with finite resolution and uncertainty. Calibration converts measurements into interpretable estimates.
Reproducibility
Keep instrument configuration, units, timing conventions and processing steps with the data. These are part of the scientific result.
Explain without looking
- Propose a data-only student investigation using an existing spacecraft dataset.
- A downlink carries 8 megabits each second for 10 s. Ignoring overhead, find transferred megabits.
Further reading and review references
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