AMSAT SA

Registered as a non-profit company

Registration 2016/111111/08

 

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AMSAT SA
P O Box 90438
Garsfontein 0042
South Africa
Tel:  012 991 4662

Email:
admin@amsatsa.org.za


Weekly satellite report 

11 November 2018

 

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SA AMSAT EZINE July 2018 edition is available

To request a trial copy send your email address here with trial copy in the subject line


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DONORS
Deon Coetzee ZR1DE
Tobile Koni ZS6TKO
Jan van Rooyen ZR5JR
Pravin Ashok
Donald Jacobs ZS2BW
Ray Webber ZS6RSW
Tarries Brink  ZS6MNO*
Kempton Park  Amateur Radio Technical Society ZS6KTS
Paul Roos ZS6HQ*
Anton Janovsky ZR6AIC
Pine  Pienaar ZS6OB
Gert Botha ZS6GC
David Horne
Etienne Saayman ZS5EFS
Nic van Duffelen ZR6AEZ
Andre Rox ZS6ARX
Carl Wentzel ZS6CFW
Gert Kok
Gordon Prentice ZR6RA
Rassie Erasmus ZS1YT
Guy Eales ZS6GUY
Bert van der Ploeg ZS6VDP
Wally Watson
Rickus de Lange ZS4A
Kerverne Thurling ZS1ABU
Lem Melidonis ZS1LEM
Paul Johnson ZS1S
Martinus Grobbelaar
Michael Boast ZS5BGV
Francois Basson ZS6DGN
Robe Bareham ZS1SA
Thomas Ambrose  ZS1TA*
Craig Hardman ZS5CD
Ton van den Bon
Grant Dixon ZR6WTF
Rene Gouws ZR1RTG

Christo Pelser SA6BUQ
Marinus Brand ZS6MP
Hennie Rheeeder ZS6ALN

Ronald Verweerdt ZS6RVC

 

*Denotes  that the person has made several donations over time. Thank you

New Members
November 2018

Marinus Brand ZS6BM

Ronald Verweerdt ZS6RVC

JO97 Launched and operational

On December 3rd, 2018, JY1Sat was launched on a Falcon 9 vehicle from Vandenberg Air Force Base in California. Part of Spaceflight’s

SSO-A: Smallsat Express launch, JY1Sat is a project of the Crown Prince Foundation of Jordan. Telemetry has been received and decoded around the world since the launch.

 It had been designated Jordan-OSCAR 97 (JO-97)

The telemetry downlink frequency is 145.840 MHz, this will use the usual FUNcube standard 1k2 BPSK format. The linear transponder, for Single Sideband (SSB) and CW modes, will downlink on 145.855-145.875 MHz and uplink on 435.100-435.120 MHz. The transponder is inverting so Lower Sideband (LSB) should be used on the uplink and Upper Sideband (USB) on the downlink.


 

Es'hail Sat launched successfully

SpaceX successfully launched the Es’hail-2 satellite on Thursday, November 15 from Launch Complex 39A (LC-39A) at NASA’s Kennedy Space Center in Florida. Liftoff occurred at 20:46 UTC, and the satellite was deployed to a geostationary transfer orbit (GTO) about 32 minutes after liftoff.


Built by Mitsubishi Electric Corp. and owned by Qatar’s national satellite communications company Es’hailSat, Es’hail 2 will provide television broadcasts, broadband connectivity and government services to Qatar and neighbouring parts of the Middle East, North Africa and Europe. Es’hail 2 also carries the first amateur radio payload to fly in geostationary orbit. Es’hail-2 will be “parked” 35 786 km above the equator at 25.5°East, nearly due North from Pretoria and Johannesburg (which are at 28°E).
 
 Es’hail-2’s footprint will cover a population of approximately 5.2 billion. This translates to more than 1.5 million Radio Amateurs in nearly 225 countries


Es’hail-2 Linear Amateur Radio Transponder


The published uplink frequency is 2 400.050 to
2 400.300 MHz with the centre of the band being
2 400.175 MHz. Total bandwidth is thus 250 kHz and right-hand circular polarization will be used.

The downlink frequency is 10 489.550 to 10 489.800 MHz with the centre of the band being 10 489.675 MHz. Vertical polarization will be used.

The preferred modes of operation will be SSB and CW. 5 Watt uplink power to a 60 to 75 cm offset dish should be more than sufficient for the uplink. The transponder will also be fitted with a “LEILA” (LEIstungs Limit Anzeige) input power limiter to ensure fair play and that the AGC of the transponder is not triggered (hogged) by a single, high power transmission, thus reducing the sensitivity of the satellite. In short, running higher uplink power than necessary will be counterproductive,

A detailed paper was presented by Hannes Coetzee ZS6BZP at the 2018 AMSAT SA Space Symposium.  Plans are being made to have a live demonstration at the 2019 AMSAT SA Space Symposium on 16 March 2019. Down the ZS6BZP paper here.


An SDR CUBESAT ON THE CARDS

 

Partial populated transponder board

AMSAT SA has announced that parallel to its analogue Kletskous CubeSat, the group is working on a digital project featuring a Software defined transponder. Called AfriCUBE,  the CubeSat  will use the same space frame as KLETSKOUS . Anton Janovsky is current building a prototype transponder.  AMSATSA is inviting persons interested in becoming part of the development team to send their details to admin@amsatsa.org.za.

Meanwhile the development and final construction of the AMSAT SA KLETSKOUS is plagued by electronic component obsolescence. This forces unwanted design changes to be made to ensure that when the time comes to construct the final launch unit, the main components are still available.

The KLETSKOUS team decided to freeze the design of KLETSKOUS and purchase a quantity of devices to proactively mitigate future obsolesce. This decision will also speed up the process of putting a final satellite on the table.  “Every time we change designs to mitigate for the discontinued components, it is like starting the design a fresh, often creating new problems that have to be solved”, Hannes Coetzee, ZS6BZP said. “By freezing the design, in other words making a final decision on the main specialised devices to be used, we will be able to speed up the process of putting a flight ready unit on the table.”

KLETSKOUS is not a textbook design.  Most of the sub-components that will make up KLETSKOUS are designed and being built by the volunteer team.  “We do not have the finances to go out and purchase sub-units and simply wire them up.”, Coetzee said.


 


2019 AMSATSA Space Symposium

This a call for papers for the 2019 AMSAT SA Space Symposium to be held in Gauteng on 16 March 2019. Send a synopsis of a paper proposal to admin@amsatsa.org.za. The theme of the conference is “Space Science with Amateur Radio”.


AMSAT FOX1-1 Cliff  Launched

On Monday, 24 September 2018 Jerry Buxton, NØJY, AMSAT Vice-President Engineering, delivered and performed the integration of AMSAT’s Fox-1Cliff CubeSat in preparation for launch.

The launch scheduled by SpaceX for 19 November 2018

Uplink:     
435.300 MHz FM voice (67.0 Hz CTCSS tone)
 1267.300 MHz FM voice (67.0 Hz CTCSS tone)

Downlink: 
145.920 MHz FM voice;
AFSK digital data up to 9600 bps
Transmit power: 600 mW nominal

Because only one uplink frequency can be active at a time, the use of the Mode-L uplink will be limited to experimental periods announced in advance.

Fox-1Cliff carries the flight spare of the AO-85 Vanderbilt University Low Energy Proton (LEP) radiation experiment, and the standard Fox-1 Penn State University–Erie gyroscope experiment. Virginia Tech provided a VGA camera which is the same as AO-92 but will provide images at a higher 640 x 480 resolution. These non-SSTV images will be decoded in the FoxTelem software.

 

Fox-1Cliff, unlike the other three Fox-1 FM spacecraft, does not have an active AFC on the uplinks.Fox-1Cliff’s Subaudible Telemetry (low-speed telemetry) will be the same as for AO-85, AO-91, and AO-92. It will be supported by the same FoxTelem software already released. As with AO-92, a high-speed mode will be used to support the Virginia Tech VGA camera experiment. This mode will be active for 40 minutes by ground command before reverting to standard U/v transponder voice operation.

Fox-1Cliff is named in honour of long-time AMSAT member, contributor, and benefactor Cliff Buttschardt, K7RR (SK), who passed away in 2016. Cliff’s contributions to AMSAT and other amateur satellite programmes, including serving as an adviser during the initial development of the CubeSat specification at California Polytechnic State University, earned him the Lifetime Achievement Award from Project OSCAR in 2006.


YOTA 2018

Software

SDR

Satellite Tracking

Mapping Software UI 32

CW/RTTY Decoder

Low speed telemetry Decoder

High speed telemetry Decoder

ISS slow scan TV

Audio link between applications

Presentations

Journey into SDR

KLETSKOUS

KLETSKOUS TRANSPONDER

KLETSKOUS MAGNETIC STABISATION

10GHz Beacon

Links to noise monitoring

Contesting

Digital Radio


More Kletskous Progress

A flight-ready solar panel for Kletskous.

The solar cells are glued to the PC board using conductive silver epoxy. This is done under vacuum to prevent bubbles being formed in the epoxy. Bubbles may burst in the vacuum of space, fracturing the paper thin glass solar cell and destroying it in the process.


Become a partner in space

Donate to the AMSAT SA Kletskous fund and become a partner in space

Please make your contribution. You may pay directly into our account electronically. Please send the payment details with your name, callsign, email and  postal address to kletskous@amsatsa.org.za.

All contributions will be acknowledged on this page (Scroll down). Donations of R500 or more will be acknowledged with a certificate.

Bank Details: AMSAT SA, ABSA Menlyn, Branch code 632 005
Account: 40 8982 6281


KLETSKOUS SPONSORS

 

RS, the component supplier in South Africa has become a component sponsor for the KLETSkous project.

RS Components is the market leader in the high service level distribution of electrical, electronic, mechanical & industrial products as well as tools.  Offering over 400 000 products across 2000 leading brands at www.rsonline.co.za, RS serves every sector of industry in the procurement of their products relating to maintenance, repair, operations, low volume production, research and development.


TRAX SPONSOR PCBs for KLETSkous More about  TRAX



Avnet : a broad line supplier of semiconductors,  passives, magnetics, enclosures, optoelectronic, GPS / GSM, interconnect, electromechanical, embedded products and components