Transcription
Beginners Guide to AmateurSatellitesDave Johnson, G4DPZIn collaboration withCarlos Eavis, G3VHFAMSAT-UK
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 SiliconValleyNow built by and/or funded by members of AMSAT and AMSATaffiliatesOriginally a “bleep sat” but now carry sophisticated repeaters ortransponders Are encouraged to carry sensors and other scientific experiments AMSAT-OSCAR designations granted after launch
A bit of History Sputnik 1 was theworld's first Earthorbiting artificialsatellite. Launchedby the SovietUnion on October4, 1957.
From small beginnings OSCAR-I , which had abattery powered 140mwtransmitter operating in the2 meter band.Transmitted it’s message of“HI” for three weeks andre-entered the atmosphereon January 31, 1962 aftermaking 312 orbits.
To the very ambitious OSCAR-40, a High EarthOrbit satellite with anapogee of 60,000 KM.A set of lineartransponders,transmitting andreceiving on selectedfrequencies.Data modes still in usetoday.Experiments includedGPS for orbitdetermination.
How Many Now?Info from http://www.amsat.org/status/
Some important terms
Satellite Orbit Tracks
Low Earth Orbit (LEO) LEOs are satellites that are orbiting theearth from 400 to 2000 KM altitudePass times range from 12 to 22 minutesLinear transponder (SSB/CW) or FMrepeaterTypically operate in the 2m / 70cmbandsPolar / high inclination orbitSO - 50
Inclined Orbit
Satellite Coverage
GEOIn conjunction with AMSATDL, Qatar’s Es’hail 2 satellitewill provide the first amateurradio geostationarycommunications that couldlink amateurs from Brazil toThailand. The satellite isexpected to launch in the 3rdquarter of 2017 and will bepositioned at 25.5 degreesEast.AMSAT-UK Link
CubeSats Based on a 10cm cube butsome can be a bit biggerOperate in AmateurSatellite allocation AX-25 protocol & others Funcube Launch CelebrationBBC
Student Satellites PCSAT 1US Naval AcademyAerospace studentproject APRS protocol note the antennas!
How is a Satellite Designed
FM v Linear Transponder
Threats to Satellites
Operating a Satellite
Ground Station Equipment Antennas (rotators) Preamps (and phase switches) Radios Tracking Software
Antennas Handheldantennas:Good for portableops (and SOTA) Commercial ArrowAntennasDelfi-C3 transponder enabled
Antennas Handheld antennas:Elk/ArrowDIY out of availablematerialsYou will generallyneed a Mux
Antennas Extreme portable!:Howard Long,G6LVBUsed on AO-40 verysuccessfully
AntennasFixed Station: Wimo X antenasYaesu G5500rotatorHomebrew dishwith modified LNB
Handheld Transceiver The minimum you needto operate. Dual Band Full Duplex CTCSS
Base Station FT-847 TS2000 IC-910 IC-9100 FT-736r IC-9700 (SDR)
Paired Devices FT-817 SSB VHF/UHF Manual tuning fordoppler but itworks reallywell Image c/o Ivo, PA1IVODrew, KO4MA at AMSATColloquium 2016
Tracking Software
Tracking SoftwareProprietary Tracking Software For PurchaseMacDopplerMac OS 10.4 10.5Dog Park SoftwareSatPC32WindowsDK1TBSCRAPWindowsBytheway SDLInstantTrackDOSPaul Williamson, KB5MUShareware or Open SourceNova for WindowsWindowsNorthern Lights Software Assoc.OrbitronWindowsSebastian StoffPredictOS X, Linux & WindowsJohn A. Magliacane, KD2BDPortablePredict OS X, Linux & WindowsJohn A. Magliacane, KD2BDPetitTrackEmbeded LinuxEdson Pereira, N1VTNPocketSat PalmOS, WindowsCE 3.0Big Fat Tail ProductionsSatExplorerWindowsGabriel Rivat F6DQMGpredictOS X, Linux & WindowsAlexandru Csete, OZ9AECPassLinux, Mac, Windows, PalmOS,WindowsCE, Android, Iphone,IPadPedro Converso, LU7ABF ls/software.php
Other ResourcesWeb Sites (not a complete list, Google is your 2yo.com/Mobile Applications (these target Amateur, CubeSat, ISS & Weather)AMSATDroid osoftworksiOShttps://itunes.apple.com
Find out more AMSAT-UK: www.amsat-uk.orgRSGB: www.rsgb.orgEmail: dave@g4dpz.me.ukTwitter: @g4dpz
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 transponde
