[amsat-bb] Re: video: satellite power-saving through on-board tracking

Nick Pugh K5QXJ quadpugh at bellsouth.net
Thu Nov 5 04:16:07 PST 2009

This is very informative I will pase it on to the CAPE team


-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Bruce Robertson
Sent: Wednesday, November 04, 2009 10:43 AM
Subject: [amsat-bb] video: satellite power-saving through on-board tracking

In a further exploration of the use of the Plan 13 algorithm in Atmel
(or similar) micro-controllers, I've posted a youtube video and
related text that suggests how an amateur satellite could use such a
device on board to change its mode based on its location over the


The video includes a sped-up night-long tracking session, some current
consumption testing on the bench and a calculation of the power
budget, which show that even for birds transmitting in the tens of
milliwatts, this approach can provide about a 14% improvement in power

73, Bruce
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