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SA AMSAT EZINE July 2018 edition is available
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Danie Conradie ZS6SDC
High Altitude Balloon launch
Binary Space will be launching another high-altitude balloon on Saturday 17 November from the NWU Vaal Triangle Campus in VanderBijlpark. This launch is sponsored by HTI. New equipment being flown includes a DIY repeater developed by Frik Wolff ZS6FZ with an Uplink on 433.550MHz - 88.5Hz Tone to Activate and the Downlink: 145.450MHz
As usual the SSTV camera system will fly again. This time it also includes a couple of static images that will be transmitted randomly in between the live images. There have been a few updates on the camera and this should eliminate the green images problems experienced in the past. This time the camera will point towards the earth so get ready for some google satellite like images.
The main HD camera will point outwards and the team are hoping for some amazing footage during the nice weather that is expected for Saturday. Current flight predictions show that this will be a fun one in terms of the amount of travelling involved. If all goes according to the predictions then it should land no more than 30km from the launch. Predictions show that it will turn around and come back at higher altitudes.
“Because of the current flight plan we are doing a proper ground station courtesy of the ZS4SRK Sasolburg Radio Club”, said Tom van den Bon. “The ground station will capture data, and communicate on the local repeaters with the chase teams and everybody else playing along. Listen on Sasolburg Repeater: 145.600MHz and the VTB Repeater: 145.6375MHz
As an added bonus might be launching of a second balloon (Binary-06) which will carry a very experimental, 3d printed glider 'which has yet to be named'. The plan is that it would detach around 6km and then fly itself back to the launch Site. “We have only been working on this project for less than 2 weeks and it's still a work in progress so this might not happen if we are not happy with the glider by Saturday (which means we will just move it out to another day, it's happening some time either way). Should be an interesting experiment”’ Tom said. Binary-06 has been sponsored by the SiGNL (www.signl.co.za).
Everybody is welcome and if you ever wanted to join a launch then this is the perfect one since there won't be much driving happening and there is an active ground station that will run during the complete event.
Es'hail Sat launched succesfully
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.
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 .
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.
AMSAT SA and SARL workshop
24 November 2018
How to protect your station from
RF Noise Floor monitoring
Wireless Power Transfer the
largest ever threat to amateur radio
How to identify noise from lights around the house and what light to buy
Get the full programme here and book now
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 email@example.com. The theme of the conference is “Space Science with Amateur Radio”.
Another Amateur satellite to be launched soon - AMSAT FOX1-1 Cliff
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
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 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
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 firstname.lastname@example.org.
All contributions will be acknowledged on this page (Scroll down). Donations of R500 or more will be acknowledged with a certificate.
AMSAT SA, ABSA Menlyn, Branch code 632 005
RS, the component supplier in South Africa has become
a component sponsor for the KLETSkous project.
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