The following page contains links which members may find interesting:-

AMSAT-DL's P3E-Satellite

You find the SMRCC Pixel at the top left, 4 down, 2 across of course!

http://www.p3e-satellite.org/index.pl?lang=en_EN

AMSAT Colloquium

Presentation can be downloaded here:-

http://www.uk.amsat.org/

Video presentations of lectures filmed and streamed live during AMSAT Colloquium 2008

http://www.batc.tv/

Once at the BATC site, select Film Archives.

Antenna Matching

http://www.g3ynh.info/zdocs/z_matcing

The pages on impedance matching (Parts 1 and 2), including the analysis and operation of L, T and Pi networks, are excellent. The treatment of the subject includes a tiny bit of maths (R, G and jX), but that just adds to the excitement.

Leap Second related Links

International Earth Rotation and Reference Service - Measuring the irregularities of the Earth's rotation:- http://www.iers.org/

Time Nuts Mailing list :- http://www.leapsecond.com/time-nuts.htm

Some Standard Time Sites

• http://tf.nist.gov/
• http://www.npl.co.uk/server.php?show=nav.294 
• http://www.usno.navy.mil/

Propagation Links

NOAA's Space Weather Prediction Centre. Solar indices every three hours.

    http://www.swpc.noaa.gov/ftpdir/latest/wwv.txt

RSGB Propagation Studies page - lots of links and useful information.

    http://www.keele.ac.uk/depts/por/psc.htm