OT: Archiving data/video/movies/photos/oral history

From: William Donzelli <aw288_at_osfn.org>
Date: Thu Jun 8 12:20:23 2000

> Radar is old, many years prewar but the knowledge
> to do the needed signal processing and presentation took
> longer to develop. It's the subtleties of the reflected signal
> that has information of greater interest beyond simple range.

I must disagree, as the old A, B, and C-scopes (and derivatives) were
present and used on nearly all radars until 1948 or so. The radarman did
the signal processing in his head, mostly by looking at the (nearly*) raw
video coming off the receiver. By the late 1950s, however, the signal
processing did start to get complex (one of these days I have to rescue a
vacuum tube based vector display from a guy. Hundreds of tubes.).

*downconverted, of course, and maybe some anti-jam stuff thrown in
(basically controlls to play with the AGC constants).

William Donzelli
aw288_at_osfn.org
Received on Thu Jun 08 2000 - 12:20:23 BST