Beginners Guide to Amateur Satellites
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1 Beginners Guide to Amateur Satellites Dave Johnson, G4DPZ In collaboration with Carlos Eavis, G3VHF AMSAT-UK
2 Why Oscar? An OSCAR is an Orbiting Satellite Carrying Amateur Radio Built for non-commercial purposes Originally built by Project OSCAR members in garages in Silicon Valley Now built by and/or funded by members of AMSAT and AMSAT affiliates Originally a bleep sat but now carry sophisticated repeaters or transponders Are encouraged to carry sensors and other scientific experiments AMSAT-OSCAR designations granted after launch
3 Sputnik 1 was the world's first Earthorbiting artificial satellite. Launched by the Soviet Union on October 4, A bit of History
4 From small beginnings OSCAR-I, which had a battery powered 140mw transmitter operating in the 2 meter band. Transmitted it s message of HI for three weeks and re-entered the atmosphere on January 31, 1962 after making 312 orbits.
5 To the very ambitious OSCAR-40, a High Earth Orbit satellite with an apogee of 60,000 KM. A set of linear transponders, transmitting and receiving on selected frequencies. Data modes still in use today. Experiments included GPS for orbit determination.
6 How Many Now? Info from
7 Some important terms
8 Satellite Orbit Tracks
9 Low Earth Orbit (LEO) LEOs are satellites that are orbiting the earth from 400 to 2000 KM altitude Pass times range from 12 to 22 minutes Linear transponder (SSB/CW) or FM repeater Typically operate in the 2m / 70cm bands Polar / high inclination orbit SO - 50
10 Inclined Orbit
11 Satellite Coverage
12 GEO In conjunction with AMSAT- DL, Qatar s Es hail 2 satellite will provide the first amateur radio geostationary communications that could link amateurs from Brazil to Thailand. The satellite is expected to launch in the 3rd quarter of 2017 and will be positioned at 25.5 degrees East. AMSAT-UK Link
13 CubeSats Based on a 10cm cube but some can be a bit bigger Operate in Amateur Satellite allocation AX-25 protocol & others Funcube BBC Launch Celebration
14 Student Satellites PCSAT 1 US Naval Academy Aerospace student project APRS protocol note the antennas!
15 How is a Satellite Designed
16 FM v Linear Transponder
17 Threats to Satellites
18 Operating a Satellite
19 Ground Station Equipment ( rotators ) Antennas Preamps (and phase switches) Radios Tracking Software
20 Antennas Handheld antennas: Good for portable ( SOTA ops (and Commercial Arrow Antennas Delfi-C3 transponder enabled
21 Antennas Handheld antennas: Elk/Arrow DIY out of available materials You will generally need a Mux
22 Antennas Extreme portable!: Howard Long, G6LVB Used on AO-40 very successfully
23 Antennas Fixed Station: Wimo X antenas Yaesu G5500 rotator Homebrew dish with modified LNB
24 Handheld Transceiver The minimum you need to operate. Dual Band Full Duplex CTCSS
25 Base Station FT-847 TS2000 IC-910 IC-9100 FT-736r IC-9700 (SDR)
26 Paired Devices FT-817 SSB VHF/UHF Manual tuning for doppler but it works really well Image c/o Ivo, PA1IVO Drew, KO4MA at AMSAT Colloquium 2016
27 Tracking Software
28 Tracking Software Proprietary Tracking Software For Purchase MacDoppler Mac OS Dog Park Software SatPC32 Windows DK1TB SCRAP Windows Bytheway SDL InstantTrack DOS Paul Williamson, KB5MU Shareware or Open Source Nova for Windows Windows Northern Lights Software Assoc. Orbitron Windows Sebastian Stoff Predict OS X, Linux & Windows John A. Magliacane, KD2BD PortablePredict+ OS X, Linux & Windows John A. Magliacane, KD2BD PetitTrack Embeded Linux Edson Pereira, N1VTN PocketSat+ PalmOS, WindowsCE 3.0 Big Fat Tail Productions SatExplorer Windows Gabriel Rivat F6DQM Gpredict OS X, Linux & Windows Alexandru Csete, OZ9AEC Pass Linux, Mac, Windows, PalmOS, WindowsCE, Android, Iphone, IPad Pedro Converso, LU7ABF & AMSAT-Argentina
29 Other Resources Web Sites (not a complete list, Google is your friend) AMSAT-DL AMSAT-NA AMSAT-UK DK3WN Heavens-Above N2YO Mobile Applications (these target Amateur, CubeSat, ISS & Weather) AMSATDroid Free G4DPZ Android GoSatWatch gosoftworks ios
30 Find out more AMSAT-UK: RSGB:
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