Reinhard Rath <[email protected]> writes: > Thanks for your offer for help. After checking the altimeter myself, it > turns out the CRC error is from a previous flight or test, that I'm not > interested in (#1). Another flight from last year can be read out > without problems (#2) but the flight I'm looking for (#3), doesn't seem > to be recorded at all. > > My suspicion is that somewhere around apogee, power got lost. The > igniter for the upper stage motor was fired, but not the other ones, > planned to be fired a few seconds after apogee. Another altimeter was > planned to fire before the EasyMega at apogee, and apparently did so, > but rebooted afterwards. > > Is no flight being recorded because of an inflight power loss consistent > with what you would expect in this case, or should there be visible > traces of a corrupted flight data set?
If you lost power in-flight, you should see data up to very near the point of power failure. There's minimal buffering in the card as we want to record as much as possible. If a power fail happens while writing data, only the very last log record should be corrupted. On linux, we have the 'ao-dumpflash' utility to fetch every byte from the device so we can look at it, even if those bytes are mangled. -- -keith
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