International Telemetering Conference Proceedings / October 26-29, 1992 / Town and Country Hotel and Convention Center, San Diego, California / Video tape is becoming more and more popular for storing and analyzing missions. Video
tape is inexpensive, it can hold a two hour test, and it can be edited and manipulated by
easily available consumer electronics equipment. Standard technology allows each frame
to be time stamped with SMPTE code, so that any point in the mission can be displayed on
a CRT. To further correlate data from multiple acquisition systems, the SMPTE code can
be derived from IRIG using commercially available code converters.
Unfortunately, acquiring and storing analog data has not been so easy. Typically, analog
signals from various sensors are coded, transmitted, decoded and sent to a chart recorder.
Since chart recorders cannot normally store an entire mission internally, or time stamp
each data value, it is very difficult for an analyst to accurately correlate analog data to an
individual video frame. Normally the only method is to note the time stamp on the video
frame and unroll the chart to the appropriate second or minute, depending on the code
used, noted in the margin, and estimate the frame location as a percentage of the time code
period. This is very inconvenient if the telemetrist is trying to establish an on-line data
retreival system. To make matters worse, the methods of presentation are very different,
chart paper as opposed to a CRT, and require the analyst to shift focus constantly. For
these reasons, many telemetry stations do not currently have a workable plan to integrate
analog and video subsystems even though it is now generally agreed that such integration
is ultimately desirable.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/608901 |
| Date | 10 1900 |
| Creators | Gaskill, David M. |
| Contributors | Astro-Med, Inc. |
| Publisher | International Foundation for Telemetering |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Proceedings |
| Rights | Copyright © International Foundation for Telemetering |
| Relation | http://www.telemetry.org/ |
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