How much battery is left?
How much capacity the battery has today, how much it loses per year and how many years it has left, measured on your own discharges. And whether it reaches the end of life your mission needs. If you change how you operate, how many years that gains.
A PDF report you can forward, with the file and its fingerprint on the page.
How it is measured
- Battery capacity and resistance, measured in flight, each with its range.
- Pass telemetry is enough: a few samples per pass, placed on the orbit, give the health trend of the whole fleet.
- Each panel against the others, and the power electronics: supply voltages, converters and resets.
- Every warning with its reason: charge in shadow, a voltage drop the orbit doesn't explain, a load that never ends.