Jim Audiomisc
pfm Member
After a gap of almost 50 years I've finally got around to 'decoding' the data recording from the Concorde 001 Solar Eclipse flight in 1973. I can now process the actual measured data, but have a challenge which someone else might be able to clarify for me. So your starter for Mach 2...
The eclipse recording was onto a Revox A77 via some voltage -> frequency convertors. All the hardware is long gone. But I'v now converted the frequency-encoded patterns back into signal voltages. The problem is that one channel provides a 'clock' from the general airplane system and I can't work out how to interpret the patterns!
A section is shown here
http://jcgl.orpheusweb.co.uk/temp/ConcordeTime.png
Note the vertical scale is in terms of frequency produced by the V->F, but essentially means voltage because I've decoded that bit. Question is: how to read the time from the patterns? The regular time-tick with a 2 sec interval is clear. But not the use of two other levels patterned to - presumably - give the elapsed time of the actual time (French standard?) I thought it might be a binary count, but maybe not.
Anyone spot the code?
The eclipse recording was onto a Revox A77 via some voltage -> frequency convertors. All the hardware is long gone. But I'v now converted the frequency-encoded patterns back into signal voltages. The problem is that one channel provides a 'clock' from the general airplane system and I can't work out how to interpret the patterns!
A section is shown here
http://jcgl.orpheusweb.co.uk/temp/ConcordeTime.png
Note the vertical scale is in terms of frequency produced by the V->F, but essentially means voltage because I've decoded that bit. Question is: how to read the time from the patterns? The regular time-tick with a 2 sec interval is clear. But not the use of two other levels patterned to - presumably - give the elapsed time of the actual time (French standard?) I thought it might be a binary count, but maybe not.
Anyone spot the code?