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Originally posted by Brotherman
reply to post by Staroth
I dont think there is any kind of readable info on them anymore I do wonder if they have a value or not though, only value I would put stock into though is for historical reasons. I am aware of the apollo 11 tapes but these are not it time frame and other discrepancies prove they are not the ones.
Originally posted by charlyv
Originally posted by Brotherman
reply to post by Staroth
I dont think there is any kind of readable info on them anymore I do wonder if they have a value or not though, only value I would put stock into though is for historical reasons. I am aware of the apollo 11 tapes but these are not it time frame and other discrepancies prove they are not the ones.
I would think that there is a good possibility that if there is any information on these reels, it is most likely still readable.
As far as base line possibilities are concerned, it really has to do with how they were stored. Humidity is the enemy of magnetic media, but the quality of this type of tape is probably the best there was at the time.
Like another poster commented, the way in which this data was stored, and the electronics required to decipher the format that they used is really important, and you may never be able to read the data correctly if the format was custom, and designed for a specific, non generic purpose. Good Luck!
Addendum:
I should probably tell how I am familiar with these particular tapes. I was a crewmember in P-3 anti-submarine aircraft back in the cold war. We used the 9 channel audio format, which basically let us place the output of up to 8 sonobouys on these tapes (Track 1 was dedicated to an sstg timestamp). We could then take the tape back to base and do a realtime analysis of whatever the operation was. It was cool, as we could plot a target through a field of sensors and figure out if we were tracking them correctly or screwed up. Analog still had a competitive advantage in those days!
edit on 28-12-2012 by charlyv because: added errata
Originally posted by remembering
Originally posted by charlyv
Originally posted by Brotherman
reply to post by Staroth
I dont think there is any kind of readable info on them anymore I do wonder if they have a value or not though, only value I would put stock into though is for historical reasons. I am aware of the apollo 11 tapes but these are not it time frame and other discrepancies prove they are not the ones.
I would think that there is a good possibility that if there is any information on these reels, it is most likely still readable.
As far as base line possibilities are concerned, it really has to do with how they were stored. Humidity is the enemy of magnetic media, but the quality of this type of tape is probably the best there was at the time.
Like another poster commented, the way in which this data was stored, and the electronics required to decipher the format that they used is really important, and you may never be able to read the data correctly if the format was custom, and designed for a specific, non generic purpose. Good Luck!
Addendum:
I should probably tell how I am familiar with these particular tapes. I was a crewmember in P-3 anti-submarine aircraft back in the cold war. We used the 9 channel audio format, which basically let us place the output of up to 8 sonobouys on these tapes (Track 1 was dedicated to an sstg timestamp). We could then take the tape back to base and do a realtime analysis of whatever the operation was. It was cool, as we could plot a target through a field of sensors and figure out if we were tracking them correctly or screwed up. Analog still had a competitive advantage in those days!
edit on 28-12-2012 by charlyv because: added errata
Very cool. Ours were also 9 channel and as I said our time stamp is called IRIG-B. My job at the time not only recorded contacts with satellites but we maintained these recorders and much much more equipment down to component level. Just to let you know that one of the biggest problem with these tapes is the the medium on the tapes would oxidize leading to a build up on the read/write heads. We cleaned the heads (with a cleaner that is now illegal) just before we mounted a tape. Some times the tapes would be so bad you just could not use them as it would build up in just a few seconds. I hate to say don't bother but bottom line is if it is a satellite tape and it is not to old to play back and you get the equipment to do it. They still look to be blank tapes and if they are not, all telemetry is encrypted on board the satellite and a proper decrypted would be required to read it. Just to add more bad news most of the recordings were not recorded in the normal digital format ( 1 is a 5 volts and 0 is 0 volts) they were recorded in a bi-phase format such as bi-phase-mark or bi-phase-level. If that is the case then there would be a further requirement do get it to a readable format.
formatsedit on 28/12/12 by remembering because: (no reason given)