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From: dmc@videovax.tv.tek.com (Donald M. Craig)
Newsgroups: sci.astro,sci.space.shuttle,sci.space
Subject: Re: ESA-brief summary of activity
Keywords: ESA,USSR,Giotto,Hipparcos
Message-ID: <5866@videovax.tv.tek.com>
Date: 26 Jun 90 16:56:23 GMT
References: <1990Jun25.175946.20917@cc.ic.ac.uk>
Reply-To: dmc@videovax.tv.tek.com (Donald M. Craig)
Followup-To: sci.astro
Organization: Tektronix TV Measurement Systems, Beaverton OR
Lines: 18

In <1990Jun25.175946.20917@cc.ic.ac.uk> seds@cc.ic.ac.uk (M.sean Bennett)
writes: "Beginning on
19 February, a series of telecommands was transmitted to Giotto via the Madrid
tracking station, using a 70m antenna and a 100000 W transmitter, many thousand
times the power of a TV broadcasting station."
Reaching for my trusty Television and Cable Factbook, which lists in gory
detail facts about all US television stations, I extracted the following:
KNLC, Channel 24 (530 - 536 MHz), St. Louis, MO, Authorized power: 3090-kw
max. visual, 309-kw max.aural.
WTZA, Channel 62 (758 - 764 Mhz), Poughkeepsie, NY, Authorized power: 5000-kw
max. visual, 500-kw max. aural.
KICU, Channel 36 (602 - 608 MHz), San Jose, CA, Authorized power: 4098-kw
max. visual, 410-kw max. aural.
That's 3 million watts, 5 million watts, and 4 million watts.  Perhaps the
100000 W number was a typo?
cheers,
Don Craig
Tektronix Television Division, dmc@tv.tv.tek.com