AMATEUR RADIO SATELLITES Created by VK 2 YK

AMATEUR RADIO SATELLITES Created by VK 2 YK - ADAM

AMATEUR RADIO SATELLITES • • History Satellite types Orbits What do I need? Active satellites Awards Demo

TERMINOLOGY • • OSCAR – Orbiting Satellite Carrying Amateur Radio LEO – Low Earth Orbit HEO – Highly Elliptical Orbit GEO - Geosynchronous Equatorial Orbit AOS – Acquisition of signal LOS – Loss of signal Doppler Shift - The change in frequency of due to the speed of the satellite.

AMATEUR RADIO SATELLITE HISTORY • OSCAR 1 – Launched Dec 1961 (Sputnik launched Oct 1957) – 22 days in orbit • OSCAR 5 – Made by Australian Amateurs in Melbourne launched Jan 1970. – Telemetry only 10 m & 2 m

AMATEUR RADIO SATELLITE HISTORY • OSCAR 7 – Launched Nov 1974 – Semi operational • Radio Sputnik RS-1 – 1 st Russian Amateur satellite – Launched Oct 1978 • OSCAR 10 – 1 st Phase 3 B – HEO – Launched Jun 1983

AMATEUR RADIO SATELLITE HISTORY • OSCAR 16 – First of the FM transponders – Packet BBS – Launched Jan 1990 • OSCAR 27 – First FM voice transponder – Launched Sep 1993 • OSCAR 35 – First FM transponder build outside USA – Launched Feb 1999

AMATEUR RADIO SATELLITE HISTORY • OSCAR 40 – Phase 3 D HEO/GEO – Coverage was 1/3 rd of Earth – Launched Nov 2000 • OSCAR 50 – LEO FM – Still operational – Launched Dec 2002 – SO-50 • OSCAR-100 – Present day GEO (Es’hail-2) – Launched Nov 2018 – Coverage Africa & Europe

SATELLITE TYPES • FM transponders – ( cross band repeaters ) – Eg SO-50, AO-85, AO-91 & AO-92 • Linear Transponders – Converts 20 k. Hz - 100 k. Hz of spectrum from one band to another – Allows many QSOs at the same time – Use narrow band modes CW SSB etc. – Usually inverting. Convention is USB on downlink (LSB on uplink)

ORBITS • LEO – Approx 90 min orbit time – 10 to 15 minutes AOS to LOS • HEO – highly elliptical equatorial orbit out to 40, 000 km • GEO – Geosynchronous Equatorial Orbit – stays in the one spot in reference to Earth.

ORBITS • LEO - FM transponders – SO-50 – Uplink 145. 850 Mhz & Downlink 436. 795 Mhz • Downlink requires Doppler frequency adjustment • AOS 10 Khz high from centre • At LOS 10 Khz low from centre • LEO & GEO - Linear Transponders – Inverting is USB on downlink & LSB on uplink

What do I need? • Basic setup – Dual band FM handheld – 2 preferable for full duplex – Recommend - small beam antenna 2 el 2 m & 5 el 70 cm – Pass prediction data/software • Online – AMSAT NA • Software - SATPC 32 Win, AMSATDroid FREE, ORBITRON Win, GPredict All, Mac. Doppler MAC, Go. Sat. Watch IOS • Site with list of more software Celestrak

What do I need?

ACTIVE SATELLITES • FM transponders – – SO-50 - 2 m Uplink / 70 cm Downlink AO-85 - 70 cm Uplink / 2 m Downlink AO-91 - 70 cm Uplink / 2 m Downlink AO-92 - 70 cm Uplink / 2 m Downlink • Linear Transponders - SSB/CW – AO-7 - 70 cm Uplink / 2 m Downlink & 2 m Uplink / 10 m Downlink – AO-73 - 70 cm Uplink / 2 m Downlink – FO-99 - 2 m Uplink / 70 cm Downlink – EO-88 – 70 cm Uplink / 2 m Downlink – XW-2 A, B, C – 70 cm Uplink / 2 m Downlink

AWARDS

REFERENCES • • • AMSAT UK AMSAT NA work-sat. com $4 Satellite Antenna KA 7 FVV

QUESTIONS DEMO