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  Satellites - Robotic Probes
  Mariner 4 Tape Recorder

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Author Topic:   Mariner 4 Tape Recorder
Jay Gallentine
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Posts: 249
From: Shorewood, MN, USA
Registered: Sep 2004

posted 07-28-2007 03:16 PM     Click Here to See the Profile for Jay Gallentine   Click Here to Email Jay Gallentine     Edit/Delete Message   Reply w/Quote
Do I have it right that the Mariner 4 tape recorder could only be recorded to once?

That is, the TV camera snapped images, laid to the tape, and then that was it. They could be played back multiple times (and were played twice), but no ability to rewind the tape and re-record.

LCDR Scott Schneeweis
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posted 09-13-2007 10:40 PM     Click Here to See the Profile for LCDR Scott Schneeweis   Click Here to Email LCDR Scott Schneeweis     Edit/Delete Message   Reply w/Quote
Page 71/72 of the Mars Mariner Handbook detail characteristics of the tape recorder...if the ability to re-record was an enabled function I would expect to see it capture there or elsewhere in the document (it is not)... NTRS server location of the doc is here.

art540
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Posts: 432
From: Orange, California USA
Registered: Sep 2006

posted 09-14-2007 07:16 PM     Click Here to See the Profile for art540   Click Here to Email art540     Edit/Delete Message   Reply w/Quote
I just sent you some text that says the Mariner 4 tape recorder could do a second recording and did. No actual specs but perhaps it was assumed knowledge.

art540
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Posts: 432
From: Orange, California USA
Registered: Sep 2006

posted 09-14-2007 07:17 PM     Click Here to See the Profile for art540   Click Here to Email art540     Edit/Delete Message   Reply w/Quote
Thanks for the download of the Mariner Mars 1964 Handbook. In reading the flight events of Mariner III (page 24) there was a spacecraft "shock" noted at 1 min 44 secs into flight. I wonder if this could have been the internal shroud insulation being damaged by the falling ambient pressure and tangling the shroud to the spacecraft.

I have not read that this event noted by telemetry was the actual failure point. Maybe I just learned something?

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