SatNOGS part II – the slim jim antenna

Before I start, a warning … this isn’t a step by step tutorial on how to make a slim jim antenna, it’s just an insight into how I made mine. I’ll include links to sites and resources where you can get detailed information as I go along.

I think it’s safe to say this is a pretty basic, omni-directional antenna. It’s certainly cheap and easy to make but, like all antennas, you need to keep your dimensions pretty accurate as the relationship between the effective length of the antenna and the wavelength of the signal you want to receive is critical to its operation (even more so with antennas that are used to transmit as well as receive … who remembers messing with SWR meters on their CB radio setup!).

If you haven’t already, swing by the HackSpace website, download yourself a free PDF copy of issue 18 and ‘turn’ to page 110 for a full article by the now almost legendary Mr Jo Hinchliffe! There you’ll find a full list of materials, a proper step-by-step construction guide and some handy links to further information online.

Without further ado, below are a few images outlining my antenna construction …

SatNOGS part I – An Introduction

A while back I wrote a post about my ADS-B setup for tracking aircraft. Around the same time I’d read that it was possible to track and receive signals from satellites but I’d thought it must be far too complicated & involved to do such a thing … until I received my copy of issue 18 of HackSpace magazine that is!

For anyone interested in further reading I’d recommend following the link above and downloading the free PDF file so you can read up a little more on the background to SatNOGS and more detailed information on what is required to setup your own ground station …

  • Information on the Libre Space Foundation which grew from the SatNOGS project can be found on pages 46 & 47
  • If you should feel the urge to create and launch your own small satellite, check out pages 36 – 41
  • How to build a SatNOGS ground station is outlined in pages 42 – 45
  • Making a slim jim antenna (my own experiences will follow in the next post) is described on pages 110 & 111
A little tease, my SatNOGS setup (top) and my PiAware ADS-B setup (bottom)