Amateur Satelllite Beginners

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Information about Amateur Satelllite Beginners
Technology

Published on November 26, 2008

Author: g4dpz

Source: slideshare.net

Description

A presentation o Amateur Satellites given at the Leicester Amateur Radio Show in Oct. 2008 by Dave Johnson, G4DPZ and Carlos Eavis, G0AKI

Amateur Satellite Beginners Session Presented by Dave Johnson, G4DPZ AMSAT-UK / AMSAT-NA In association with Carlos Eavis, G0AKI RSGB

Presented by

Dave Johnson, G4DPZ AMSAT-UK / AMSAT-NA

In association with

Carlos Eavis, G0AKI RSGB

Welcome We are going to cover: OSCAR? History A bit of orbit theory Satellite operation Satellite modes Ground station equipment What's up!

We are going to cover:

OSCAR?

History

A bit of orbit theory

Satellite operation

Satellite modes

Ground station equipment

What's up!

Oscar... An OSCAR is an O rbiting S atellite C arrying A mateur R adio 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

An OSCAR is an O rbiting S atellite C arrying A mateur R adio

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

A bit of History OSCAR-I , which had a battery powered 140mw transmitter operating in the 2 meter band. Transmit it’s message of “HI” for three weeks and re-entered the atmosphere on January 31, 1962 after making 312 orbits. The greeting “HI” is used in almost all beacons, including AO-40’s telemetry beacon, built and launched by the Amateur Satellite service.

OSCAR-I , which had a battery powered 140mw transmitter operating in the 2 meter band.

Transmit it’s message of “HI” for three weeks and re-entered the atmosphere on January 31, 1962 after making 312 orbits.

The greeting “HI” is used in almost all beacons, including AO-40’s telemetry beacon, built and launched by the Amateur Satellite service.

A bit of History Sputnik 1 was the world's first Earth-orbiting artificial satellite. Launched by the Soviet Union on October 4, 1957.

Sputnik 1 was the world's first Earth-orbiting artificial satellite. Launched by the Soviet Union on October 4, 1957.

How is a Satellite Designed

FM v Linear Transponder

Some important terms

Threats to Satellites

Orbital Comparison

Satellite Orbit Tracks

Inclined Orbit

Molnya

Satellite Coverage

High Earth Orbit (HEO)‏

Low Earth Orbit (LEO)‏

CubeSats Based on a 10cm cube but some can be a bit bigger Operate in Amateur Satellite allocation AX-25 protocol & others

Based on a 10cm cube but some can be a bit bigger

Operate in Amateur Satellite allocation

AX-25 protocol & others

Student Satellites PCSAT 1 US Naval Academy Aerospace student project APRS protocol note the antennas!

PCSAT 1

US Naval Academy Aerospace student project

APRS protocol

note the antennas!

Operation a Satellite

Ground Station Equipment Antennas (rotators)‏ Preamps Radios Peripherals Tracking Software / Computers

Antennas (rotators)‏

Preamps

Radios

Peripherals

Tracking Software / Computers

Antennas Handheld antennas: Good for portable ops (and SOTA)‏ Commercial Arrow Antennas Delfi-C3 transponder enabled

Handheld antennas:

Good for portable ops (and SOTA)‏

Commercial Arrow Antennas

Antennas Handheld antennas: DIY out available materials You will need a Mux

Handheld antennas:

DIY out available materials

You will need a Mux

Antennas Extreme portable!: Howard Long, G6LVB Used on AO-40 very successfully

Extreme portable!:

Howard Long, G6LVB

Used on AO-40 very successfully

Antennas Fixed Station: Wimo X antenas Yaesu G5500 rotator Homebrew dish with modified LNB

Fixed Station:

Wimo X antenas

Yaesu G5500 rotator

Homebrew dish with modified LNB

Antennas Fixed Station for Cubesat C&C: M2 antenas M2 Rotator Part of the GENSO network

Fixed Station for Cubesat C&C:

M2 antenas

M2 Rotator

Part of the GENSO network

Handheld Transceiver The minimum you need to operate. TH-D7e Dual Band Duplex APRS CTCSS

The minimum you need to operate.

TH-D7e

Dual Band

Duplex

APRS

CTCSS

Base Station FT-847 Excellent sat capabilities but no longer in production

FT-847

Excellent sat capabilities but no longer in production

Base Station TS-2000 Really good all round radio with satellite facilities Does have a birdie on SO-50 downlink!

TS-2000

Really good all round radio with satellite facilities

Does have a birdie on SO-50 downlink!

Base Station IC-910 VHF/UHF/L-Band Designed for Satellite op's Old ones were deaf Mine's fine!

IC-910

VHF/UHF/L-Band

Designed for Satellite op's

Old ones were deaf

Mine's fine!

Ideal Groundstation for LEO

What's Up! We have three types of satellite: Operational Semi-Operational Deceased R.I.P. (not rust in piece, in space)‏

We have three types of satellite:

Operational

Semi-Operational

Deceased R.I.P. (not rust in piece, in space)‏

Operational Satellites DO-64 Delfi-C3 Launch Date: April 28, 2008 Primary telemetry downlink: 145.870 MHz 1200 Baud BPSK AX.25 400mW Backup telemetry downlink: 145.930 MHz 1200 Baud BPSK AX.25 400mW Linear transponder passband downlink: 145.880 - 145.920 MHz (inverting)‏ 400mW Linear transponder passband uplink: 435.570 - 435.530 MHz Transponder mode beacon: 145.870 MHz CW (10dB below transponder PEP)‏ Delfi-C3 web page: http://www.delfic3.nl/

DO-64 Delfi-C3 Launch Date: April 28, 2008

Primary telemetry downlink: 145.870 MHz 1200 Baud BPSK AX.25 400mW

Backup telemetry downlink: 145.930 MHz 1200 Baud BPSK AX.25 400mW

Linear transponder passband downlink: 145.880 - 145.920 MHz (inverting)‏

400mW

Linear transponder passband uplink: 435.570 - 435.530 MHz

Transponder mode beacon: 145.870 MHz CW (10dB below transponder PEP)‏

Delfi-C3 web page: http://www.delfic3.nl/

Operational Satellites VO-52 HAMSAT Launch Date: May 05,2005 Frequencies:Indian Transponder: Uplink: 435.220 to 435.280 MHz LSB/CW Downlink: 145.930 to 145.870 MHz USB/CW Dutch Transponder: Uplink: 435.225 to 435.275 MHz LSB/CW Downlink: 145.925 to 145.875 MHz USB/CW Mode and Antenna Polarization: V: LHCP U: RHCP

VO-52 HAMSAT Launch Date: May 05,2005

Frequencies:Indian Transponder:

Uplink: 435.220 to 435.280 MHz LSB/CW

Downlink: 145.930 to 145.870 MHz USB/CW

Dutch Transponder:

Uplink: 435.225 to 435.275 MHz LSB/CW

Downlink: 145.925 to 145.875 MHz USB/CW

Mode and Antenna Polarization:

V: LHCP U: RHCP

Operational Satellites AO-51 ECHO Launch date: June 29, 2004 Analog voice downlink: 435.300 MHz FM / 435.150 MHz FM / 2401.200 Mhz FM Analog voice uplink: 145.880 MHZ FM / 145.880 MHz USB / 145.920 MHz FM 1268.700 MHz FM 67Hz PL tone Digital Downlinks: 435.150 MHz FM 38k4 PBP, 1 watt output 435.150 MHz FM 9k6 Pacsat Broadcast Protocol 2401.200 MHz FM 38k4 bps, AX.25 Digital Uplink: 145.860 MHz FM 9k6 Pacsat Broadcast Protocol 1268.700 mhz FM 9k6 PBP Digital Beacon: 435.150 MHz

AO-51 ECHO Launch date: June 29, 2004

Analog voice downlink: 435.300 MHz FM / 435.150 MHz FM / 2401.200 Mhz FM

Analog voice uplink: 145.880 MHZ FM / 145.880 MHz USB / 145.920 MHz FM

1268.700 MHz FM 67Hz PL tone

Digital Downlinks: 435.150 MHz FM 38k4 PBP, 1 watt output

435.150 MHz FM 9k6 Pacsat Broadcast Protocol

2401.200 MHz FM 38k4 bps, AX.25

Digital Uplink: 145.860 MHz FM 9k6 Pacsat Broadcast Protocol

1268.700 mhz FM 9k6 PBP Digital

Beacon: 435.150 MHz

Operational Satellites SO-50 SAUDISAT-1C Launch date: December 20, 2002 Uplink: 145.850 MHz FM - 67.0 Hz PL tone Downlink: 436.795 MHz To switch the transmitter on, you need to send a CTCSS tone of 74.4 Hz. The order of operation is thus: (allow for Doppler as necessary): 1) Transmit on 145.850 MHz with a tone of 74.4 Hz to arm the 10 minute timer on board the spacecraft. 2) Now transmit on 145.850 MHz (FM Voice) using 67.0 Hz to PT the repeater on and off within the 10 Minute window. 3) Sending the 74.4 tone again within the 10 minute window will reset the 10 minute timer.

SO-50 SAUDISAT-1C Launch date: December 20, 2002

Uplink: 145.850 MHz FM - 67.0 Hz PL tone

Downlink: 436.795 MHz

To switch the transmitter on, you need to send a CTCSS tone of 74.4 Hz.

The order of operation is thus: (allow for Doppler as necessary):

1) Transmit on 145.850 MHz with a tone of 74.4 Hz to arm the 10 minute timer

on board the spacecraft.

2) Now transmit on 145.850 MHz (FM Voice) using 67.0 Hz to PT the

repeater on and off within the 10 Minute window.

3) Sending the 74.4 tone again within the 10 minute window will reset

the 10 minute timer.

Operational Satellites In addition, we have several satellites that have schedules under which they are operational due to current solar illumination conditions: FO-29 JAS-2 AO-27 AMRAD AO-16 PACSAT AO-7 AMSAT OSCAR 7 Details can be found on the www.amsat.org site.

In addition, we have several satellites that have schedules under which they are operational due to current solar illumination conditions:

FO-29 JAS-2

AO-27 AMRAD

AO-16 PACSAT

AO-7 AMSAT OSCAR 7

Details can be found on the www.amsat.org site.

R.I.P. CP4 HO-59 HITSat NCUBE-2 XO-53 SSETI UWE-1 AO-49 AATiS OSCAR-49 (SAFIR-M)‏ MO-46 TIUNGSAT-1 NO-45 SAPPHIRE SO-42 SAUDISAT-1B SO-41 SAUDISAT-1A AO-40 AMSAT OSCAR 40 OO-38 OPAL UO-36 UoSAT-12 SO-35 SUNSAT PO-34 PANSAT SO-33 SEDSAT-1 TO-31 TMSAT-1 PO-28 POSAT-1 IO-26 ITAMSAT KO-25 KITSAT KO-23 KITSAT UO-22 UOSAT AO-21 AMSAT-OSCAR 21 FO-20 JAS-1b LIBERTAD-1 LO-19 LUSAT WO-18 WEBERSAT DO-17 Dove UO-14 UoSAT-3 FO-12 Fuji-OSCAR 12 AO-10 OSCAR 10 AO-8 AMSAT-OSCAR 8 AO-6 AMSAT-OSCAR 6 AO-5 Australis-OSCAR 5 OSCAR III RS-15 RADIO SPORT RS-15 RS-13 RADIO SPORT RS-13 RS-12 RADIO SPORT RS-12

Other Resources You can find more details about Amateur Satellite Operations on the www here: www.amsat.org www.amsat.de www.amsat-dl.org

You can find more details about Amateur Satellite Operations on the www here:

www.amsat.org

www.amsat.de

www.amsat-dl.org

Not so subtle Advert Membership of AMSAT-UK costs £15/year ALL money goes to funding Satellite related projects, fund now stands at £73K plus a £40K legacy All committee give their time for free Many current projects!!!!

Membership of AMSAT-UK costs £15/year

ALL money goes to funding Satellite related projects, fund now stands at £73K plus a £40K legacy

All committee give their time for free

Many current projects!!!!

What we covered, phew! Orbiting Satellite Carrying Amateur Radio History A bit of orbit theory Satellite operation Satellite modes Ground station equipment What's up!

Orbiting Satellite Carrying Amateur Radio

History

A bit of orbit theory

Satellite operation

Satellite modes

Ground station equipment

What's up!

Thank You We'll be in GB4FUN for the next few hours to answer any more questions. Or outside waving antennas at satellites! --... ...--

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