Amateur Radio Satellites Presented to Virginia Tech Amateur Radio Association By Zach Leffke, KJ4QLP October 2, 2012
Agenda The Satellites Orbits and Stuff AMSAT FM Transponders Linear Transponders The Ground Station Antennas / Polarization Tracking Radios and Doppler An Exchange
The Satellites What Are They? images from: http://www.amsat.org & http://www.nasaspaceflight.com/2011/10/live-delta-ii-launch-npp-satellite-nasa-and-noaa/
The Satellites How Do they Get Into Space? images from: https://directory.eoportal.org/web/eoportal/satellite-missions/a/aerocube-3 http://www.nasaspaceflight.com/2011/10/live-delta-ii-launch-npp-satellite-nasa-and-noaa/
Orbits What s an orbit and why do I care? DOPPLER SHIFT TRACKING images from: http://mapmaker.meteor.wisc.edu/~jbrunner/ackerman/satellite/satellitebkgrnd.html
AMSAT www.amsat.org The Radio Amateur Satellite Corporation http://www.amsat.org/amsat-new/satellites/status.php
AMSAT www.amsat.org The Radio Amateur Satellite Corporation
AMSAT www.amsat.org The Radio Amateur Satellite Corporation
Satellite Transponders FM and Linear images from: http://www.arissat1.org/v3/
The Ground Station That s all great but how do I play with them? Short Answer: You need to be a Ham You need an antenna You need to know where to point the antenna You need a radio you need to know how to tune the radio you need to know how to do a proper exchange THAT S IT!
The Ground Station Antenna Low Noise Amplifier Coax Radio
The Ground Station RX Antenna TX Antenna Low Noise Amplifier Diplexer Radio Power Amplifier RX Antenna OR TX Antenna Low Noise Amplifier Power Amplifier Radio
The Ground Station OR
The Ground Station OR
The Ground Station I m a Ham, what s good enough? images from: http://www.jerryclement.ca/electronics/ham-radio/10282516_i3q8b/2/1172801879_4ez3j#!i=1172801879&k=nttpxhk
Antennas Polarization Vertical = LHCP OR Horizontal RHCP Photo Courtesy: images from: http://sv1bsx.50webs.com/antenna-pol/polarization.html <- AWESOME ANIMATION
Antennas Omni images from: Qudrifilar Helix: http://www.nemarc.org/wa3umc/wa3umc.htm Moxon Pair and Turnstile: A Simple Fixed Antenna for VHF/UHF Satellite Work by L.B. Cebik, W4RNL
Antennas Omni images from: Paper: An EZ-Lindenblad Antenna for 2 Meters by Anthony Monteiro, AA2TX
Antennas - Directional images from: http://www.arrowantennas.com/arrowii/146-437.html
Antennas Directional RHCP Helical Polarization fixed by geometry of antenna Crossed Yagis (70cm and 2m) Polarization sense can be switched through phasing lines and relays Photos From: http://www.qsl.net/sv1bsx/antennapol/polarization.html
Antennas - Tracking 70cm Crossed Yagi Elevator 2m Crossed Yagi Thrust Bearing Rotator
Antennas Tracking The way I do it Orbitron (More later) WISP DDE (More later) GS-232 Or Equivalent G-5500 Rotator Elevator Radio Antennas and stuff
Antennas Tracking Software Orbitron example
Antennas Tracking TLEs + SGP4 = AZ, EL, Doppler Shift JAS-2 (FO-29) 1 24278U 96046B 12275.30409075 -.00000010 00000-0 22741-4 0 9456 2 24278 98.5875 2.0859 0351019 114.5644 249.2498 13.52989730796305 TECHSAT 1B (GO-32) 1 25397U 98043D 12275.33976110 -.00000050 00000-0 -38721-5 0 8876 2 25397 98.3751 248.8929 0001446 14.6220 345.5013 14.23294845739128 SEDSAT 1 (SO-33) 1 25509U 98061B 12275.82168182.00000787 00000-0 14667-3 0 3339 2 25509 31.4309 90.1928 0351449 56.4291 306.9401 14.28826663727910 ISS (ZARYA) 1 25544U 98067A 12276.46198043.00019552 00000-0 34226-3 0 3966 2 25544 51.6486 308.2918 0018276 123.2706 15.1801 15.50442927794687 PCSAT (NO-44) 1 26931U 01043C 12275.85437241.00000013 00000-0 37143-4 0 1493 2 26931 67.0526 205.4155 0006266 248.7547 111.2863 14.29836102574495 SAUDISAT 1C (SO-50) 1 27607U 02058C 12275.25660586.00001210 00000-0 20295-3 0 8783 2 27607 64.5597 332.2084 0076067 227.2995 132.1640 14.72543389525582 CUTE-1 (CO-55) 1 27844U 03031E 12276.01537007.00000182 00000-0 10376-3 0 4753 2 27844 98.7024 282.8533 0008907 276.8487 83.1704 14.21081066480064 CUBESAT XI-IV (CO-57) 1 27848U 03031J 12275.54499152.00000271 00000-0 14546-3 0 4248 2 27848 98.7114 281.7720 0008866 282.9418 77.0772 14.20825882479932 http://www.celestrak.com/norad/elements/
Doppler Shift DEAD ON HIGHER LOWER T 1 Received Frequency higher than nominal frequency T 2 Received Frequency equals nominal frequency T 3 Received Frequency lower than nominal frequency Photo Courtesy of: http://www.tpub.com/content/et/14090/css/14090_19.htm
Doppler Shift Photo Courtesy of: http://www.tpub.com/content/et/14090/css/14090_19.htm
Doppler Shift Image: Screen Shot of Orbitron 3.71 Software Orbitron is free software created by Sebastian Stoff, http://www.stoff.pl/
A Satellite Exchange Call Sign, 4 Digit Grid HAM A: K4KDJ HAM B: K4KDJ, K8YSE EN91 HAM A: K8YSE, copy you EN91, please copy my EM97 HAM B: K4KDJ, copy your EM97, QSL 73s HAM A: QSL, 73s Or maybe. HAM A: KJ4QLP HAM B: KJ4QLP, K8YSE EN91 HAM A: KJ4QLP, copy you EN91, please copy my EM97, the handle here is Zach HAM B: KJ4QLP, copy your EM97, handle here is John HAM A: Thanks for the contact John, 73s HAM B: QSL, 73s, and good luck How to find Grid locator? Grid: http://f6fvy.free.fr/qthlocator/fullscreen.php
Questions?