Horus 59 Flight Report

Horus 59 came about as a result of the Southern Hemisphere Space Studies Program launch, as we still an almost-full cylinder of Helium left over. Launch planning progressed through February, resulting in a launch on Sunday the 25th of February 2023.

The following payloads flew on this launch:

  • A FM-SSTV transmitter, sending imagery in the PD120 mode on 145.100 MHz;
  • A Wenet imagery transmitter on 443.500 MHz, with the new Pi Camera v3;
  • A Geiger-Tube based radiation sensor payload on 434.210 MHz (the same one that flew on Horus 58 and SHSSP 2023);
  • A LoRaWAN beacon, provided by Liam VK5ALG; and
  • Our usual Horus Binary telemetry payload on 434.200 MHz.

Iain Crawford VK5ZD captured much of the days events on video:

Launch Planning

This launch aimed to get more AREG club members involved in the launch planning process. Mark VK5QI ran a series of workshops in the lead-up to the launch, working through the regulatory and planing aspects of a high-altitude balloon launch. The day before the launch a smaller group got together to test telemetry reception and go through some of the more practical aspects of a launch. We hope to run more workshops like this for future launches!

Some of the launch planning group working through practicing filling a balloon.

Preparations & Launch

The launch team gathered at the Auburn Community oval at 9AM and started preparing for the flight. This launch saw many spectators, including a few from the mid-north. Iain VK5ZD was also on-site to document the launch activities, with a video to come soon (once he’s back from a holiday!). The launch site weather was perfect, with mostly clear skies and only light winds.

AREG Club Members preparing the balloon for launch, with many onlookers! (Imaged by the Wenet payload waiting to be launched)

All the payload were powered on, tested and sealed up, and the balloon was filled. This was a ‘fast fill’ launch, using up all the leftover gas from the previous SHSSP 2023 launch, and went smoothly.

The balloon and payloads were raised into the air, with the final payload handed over to Jackson (son of AREG member Brett VK5TLE) to perform the launch!


Chase & Recovery

After the launch, the chase teams (and there were 7 of them on this launch!) headed north-east to get closer to the predicted landing area, pulling in at a rest stop south of Hanson, SA.

Chase Teams waiting for the balloon to burst near Hanson, SA

Peter VK5KX was set up here with his portable rotator station, receiving telemetry from all payloads:

Peter VK5KX’s portable tracking setup

While waiting at the Hanson rest stop the balloon was spotted flying at 30 km altitude, almost directly above the rest stop location! Appearing as a small white dot, many of the chasers were able to watch the balloon travel across the sky for about 20 minutes, before seeing it disappear when it burst at 32,807 metres altitude.

Iain, Ady, Drew and Mark watching the balloon drift along at 30km altitude.

The chase teams didn’t have far to travel to get to the landing area, only 7km to the North-East of Hanson, just off the Barrier Highway. All the teams were able to get into position to watch the payload descend into an empty paddock, a great experience for the new balloon chasers!


Horus 59 Flight Path

The payloads were quickly recovered, with the mandatory Wenet Payload group photo being taken once the payload were back at the cars:

Horus 59 Chase Team Group Photo, taken by the Wenet Payload camera.

FM-SSTV Payload Results

Apart from an issue with the onboard GPS receiver, the FM-SSTV payload transmitted imagery fine all throughout the flight. So far we’ve received a few reception reports from the Adelaide area, and also Pt Lincoln, though we expect this payload would have been receivable well into Victoria. If you received imagery from this flight, please let us know!

A selection of images received by Mark VK5QI’s home station in Adelaide are shown below:

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Wenet Payload Results

The new camera (A Raspberry Pi Camera v3) under trial on this launch produces images with excellent colour and low distortion, however as it ascended the lens started to de-focus, resulting in all the images above a few km altitude being quite blurry.

This is most likely due the extreme cold the camera was subjected to resulting in physical variation of the lens-to-sensor spacing. Whether this can be compensated for will be determined through some on-ground experiments (dry ice might be involved…), though it’s likely we’ll look at other camera options for future launches.

A selection of photos taken by the Wenet payload camera are shown in the following gallery:

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LoRaWAN Payload Results

On this flight Liam’s LoRaWAN payload featured an upgraded antenna, and even though the maximum altitude of this flight was 500m below when the LoRaWAN payload was previous flown (Horus 58), it was received another 50km further afield, by a TheThingsNetwork station in Ballarat, Victoria. We’ll try out this payload again on future launches, hoping to get even longer reception reports!

LoRaWAN Payload Coverage Map

Receiver Statistics – Horus Binary Telemetry

The Horus Binary payload proved to be as reliable as ever, reporting position and sensor data throughout the flight. A Grafana dashboard summarising the telemetry data from the flight is available here.

We saw a total of 25 unique callsigns receiving on this flight, with reception statistics for each station shown below:

Horus 59 - HORUS-V2 Receiver Statistics

CallsignReceived PacketsPercentage of Flight ReceivedFirst-Received Altitude (m)Last-Received Altitude (m)
VK3TNU pi3-384145.0%1342415292

Horus 59 - HORUSGEIGER Receiver Statistics

CallsignReceived PacketsPercentage of Flight ReceivedFirst-Received Altitude (m)Last-Received Altitude (m)
VK3TNU pi3-390048.1%1182115415

Receiver Statistics – Wenet Imagery

This flight saw 10 receiver stations contributing packets to the live imagery on https://ssdv.habhub.org/. Thanks to all that helped out with this!

VK5LO: 63593 packets (15.53 MB)
VK5IS: 126191 packets (30.81 MB)
VK3TNUpi4-1: 7311 packets (1.78 MB)
VK5CLD-9: 40111 packets (9.79 MB)
VK5PW: 110448 packets (26.96 MB)
VK5KX: 56684 packets (13.84 MB)
VK5AKH: 40550 packets (9.90 MB)
VK5QI: 146240 packets (35.70 MB)
VK5ALG: 98107 packets (23.95 MB)
VK5ST: 638 packets (0.16 MB)


Even with some payload issues, Horus 59 was a successful launch and saw lots of AREG club members get involved in the planning, execution, and chase aspects of the flight. Thanks to all that came out for the day, and also thanks to those that helped receive telemetry throughout the flight!

Project Horus’ next launch will likely not be for a few months, and will hopefully see the return of the DVB-S transmitter payload, and live video from the stratosphere!

Horus 59 - Flight Statistics

Flight Designation:Horus 59
Launch Date:2023-02-25 23:29Z
Landing Date:2023-02-26 01:42Z
Flight Duration:~2 hours, 12 min
Launch Site:-34.02935, 138.69128
Landing Site:-33.70648, 138.88831
Distance Traveled:40 km
Maximum Altitude:32,807 m

Next Fox Hunt – Friday 31st March

AREGs next car-based fox hunt will be held this coming Friday the 31st of March, starting from the car park of the North Adelaide Aquatic Centre Carpark at 6:30 PM. This is somewhat out of our usual schedule due to the foot-based hunt held earlier in the month, and we hope to get back to our usual second-Friday schedule in May.

We’ll have three foxes deployed around the Adelaide area, on both the 2m and 70cm bands, so come along and have a go!

The frequencies will be:

  • 145.300 MHz (1W transmit power)
  • 144.390 MHz (100mW transmit power)
  • 439.400 MHz (50mW transmit power)

As usual, liaison will be on the VK5RSB Summertown 70cm repeater which operates on 439.900 (-5MHz) 91.5 CTCSS. Please come up on the repeater so we know how you are faring throughout the evening!

The event is open to anyone with radio direction finding equipment and will span most of the Adelaide metropolitan area. We would love to see you there!

AREG Summer Daytime Fox Hunt & BYO Picnic – Sunday March 5 @ 12pm

VK5ZM hunting 2m “Foxes” in 2019

The next AREG hosted fox hunt is planned to be a daytime family “hand held, on foot” style hunt and BYO picnic event, held in Drage Reserve, Felixtow, just 6km north east of the city centre (near the Kelmzig O-Bahn bus interchange). Members and visitors are welcome to join us in the park from 12.00pm, on Sunday the 5th of March, 2023.

AREG will deploy 6 beacon transmitters on the 2m amateur band (144MHz) throughout the park. The challenge will be to see who can find all of them the fastest!

For those who dont have any equipment, take a look at (this design) by NT1K! It is very simple and quick to put together! Add a variable attenuator and a receiver and you are away!

If you don’t have any gear but want to give it a try, AREG will have at least 1-2 loan sets of gear available, based on the very popular VK3YNG sniffer receivers, or we can arrange to buddy you up with one of the club members who do have equipment so you can get a first taste of fox hunting ARDF style.

If you’re not into fox hunting, but would still like to gather with all of us from AREG, we are also promoting this event as the AREG Summer BYO Picnic for 2023. Just bring your own rugs, chairs, and food and drinks.

AREG has picked this location as it has lots of amenities for all of the family. There are public BBQs, a kids playground and public toilets in the area as well as ample parking in the Drage Reserve car park. The check-in point will be marked with AREG Flags and will be located on the south side of the river Torrens near the Riverside Park western BBQ area (west of the play ground closest to the Drage Reserve Car Park).

This will be a family freindly event with people of all ages welcome to join in, however children must be kept under the supervision of an accompanying adult at all times.

We will also endeavor to have someone monitor the VK5RSB 70cm repeater on 439.900 (91.5Hz CTCSS access tone) to help guide anyone in who is having problems finding us.

For those who want to be prepared and setup their receivers ahead of time, the fox frequencies will be:

Transmitter NumberFrequency (MHz)

We look forward to seeing you there!

Next Project Horus Launch – Horus 59 – 26th February 10AM

The AREG’s High-Altitude Ballooning sub-group, Project Horus, is planning their next launch for Sunday the 26th of February, with a planned launch time of 10 AM ACDT.

This launch will be performed from the Auburn Community Oval, with the launch team arriving on site from around 9:15 AM. Spectators are welcome!

The payloads for this flight will include:

  • A FM-SSTV Transmitter on 145.100 MHz
  • A Wenet Imagery transmitter on 443.500 MHz
  • Horus Binary telemetry on 434.200 MHz
  • Radiation Sensor Payload on 434.210 MHz

Details on these payloads are available further below.

Tracking of the flight will be via the SondeHub-Amateur tracker, available by clicking this link.

A dashboard showing telemetry from the primary and radiation sensor payloads is available here.

Details on the payloads flying are available below:

Primary Telemetry – 434.200 MHz

Reprogrammed RS41The primary tracking telemetry will be transmitted on 434.200 MHz using the Horus Binary 4FSK data mode. Amateurs in the Adelaide and Central SA region are also encouraged to get involved with the flight through receiving and uploading flight telemetry from our 70cm band tracking beacons. Every piece of telemetry data is valuable to the flight tracking and recovery teams so if you can help join the distributed receiver network to collect that data you will be making an important contribution to the project!

If you try receiving the telemetry from this flight, you’ll need a SSB-capable 70cm receiver (or a SDR), and the Horus-GUI telemetry decoder software. A brief guide on setting this up is available here: https://github.com/projecthorus/horusdemodlib/wiki/1.1-Horus-GUI-Reception-Guide-(Windows-Linux-OSX)

Listeners that already have Horus-GUI installed are encouraged to update to the latest version, which is available at this link.

Note that you will need to use a USB ‘dial’ frequency of 434.199 MHz for the 4FSK signal to be centred in your receiver passband and hence be decodable.

FM SSTV Imagery – 145.100 MHz

This launch will most likely be flying a FM SSTV transmitter operating on 145.100 MHz FM. It will run approximately 200mW transmit power. The transmitter will have 1 minute gaps between image transmissions to avoid overheating the transmitter. This payload last flew on Horus 50, and has since been upgraded to support higher resolution imagery.

SSTV Imagery Example

The payload will be transmitting images using the PD120 SSTV mode throughout the flight, and can be decoded using any SSTV software capable of decoding this mode (pretty much all of them!). This mode is what was commonly broadcast from the International Space Station.

Examples of suitable software you can use to decode the SSTV pictures include:

Any FM receiver (including handhelds) should be capable of receiving this payload, though as with the cross-band repeater, a Yagi antenna may be necessary for reliable reception at the edges of the transmitter footprint.

We’ve also setup a temporary 2m SSTV skimmer up at AREG’s remote HF receive site, which (if it works!) will post received images here: https://botsin.space/@aregsstv/tagged/PD120

If you do receive images, please post them to Social Media and on Twitter include the #horus59 hashtag so everyone can see them! Reception reports would also be appreciated, please send these to vk5arg@areg.org.au

Radiation Sensor Payload – 434.210 MHz

A radiation sensor payload, using a Geiger-Muller Tube, will also be launched on this flight. This will be transmitting on 434.210 MHz, also using the Horus Binary 4FSK  data mode. The aim of this payload is to investigate the variation in radiation exposure throughout the flight, and compare it with data from previous launches.

This telemetry can be decoded using the same Horus-GUI software as the primary telemetry. Note that you will need to use a USB ‘dial’ frequency of 434.209 MHz for the 4FSK signal to be centred in your receiver passband and hence be decodable.

Wenet Imagery – 443.500 MHz

Imagery on this flight will be transmitted via the Wenet downlink system, which uses 115kbit/s Frequency-Shift-Keying to send HD snapshots. Reception of the Wenet imagery requires a Linux computer, a RTLSDR, and a 70cm antenna with some gain (a 5-element Yagi is usually enough).

This payload will most likely be trialing the new Raspberry Pi Camera v3, which will hopefully bring improved image quality (if it works!).

Wenet imagery from a previous launch.

A guide on how to get set up to receive the Wenet signal is available here: https://github.com/projecthorus/wenet/wiki/Wenet-RX-Instructions-(Linux-using-Docker)

Please note the transmit frequency of 443.5 MHz, which may require listeners to re-configure their Wenet setup. Listeners who are already setup to receive Wenet should consider updating their decoding software to the latest version (December 2022), with update instructions available here.

During the flight, the live imagery will be available at this link: http://ssdv.habhub.org/

SHSSP 2023 Flight Report

In January 2023, the Project Horus High-Altitude Ballooning group performed two launches, Horus 58 on the 15th of January, and the Southern Hemisphere Space Studies Program 2023 launch, on the 29th of January.

Southern Hemisphere Space Studies Program Background

The Southern Hemisphere Space Studies Program is a multi-week course conducted by the University of South Australia, in partnership with the International Space University. This is an intensive program designed to provide a multidisciplinary understanding of the key activities and areas of knowledge required in today’s space professions. It covers a wide range of topics including space systems engineering, space science, space law, and much more!

The Amateur Radio Experimenters Group has been involved in this program for many years, assisting with High-Altitude Balloon workshops. Over the course of a week, participants learn about the regulatory, technical, and practical aspects of a high-altitude balloon launch; develop a payload to fly on the launch; and finally perform the launch and analyse the collected data.

The SHSSP 2023 High-Altitude Balloon Cohort

This year’s participants were split into teams focusing on different aspects of the flight:

  • Launch Planning & Execution, lead by Mark VK5QI
  • Payloads, lead by Matt VK5ZM
  • Ground Stations & Telemetry, lead by Bill VK5DSP
  • Imagery and Data Analysis, lead by David Bruce

This years launch included multiple imaging payloads (horizon and nadir-facing), and a radiation sensor payload, which the participants calibrated against a Cobalt-60 source and a known-good personal dosimeter. The dosimeter was also flown as a backup.

Launch Planning & Delay

Planning for the flight started on Monday the 23rd, where it was realised that a weather front was going to be moving through the state over the launch weekend. This meant that there was significant uncertainty in the weather models, and so both the flight path predictions, and the predictions for launch day weather was changing drastically with every model update.

On Wednesday the call was made based on the current weather models to move the launch from Saturday to Sunday (with a fairly significant effort in rearranging all the launch-day logistics on the part of UniSA!). At this point the cloud forecasts for Sunday looked significantly better (no cloud!), and the predicted flight path resulted in a landing not too far from Auburn.

Unfortunately, as we got closer to the launch day, the weather forecasts got worse and worse. The weather front which was originally predicted to pass over the launch area on Saturday was now ‘running late’, and would still give us grief on the Sunday. While the wind and temperature forecasts looked good, we now had a 100% chance of blanket cloud cover (rending the Nadir-facing imagery useless), and a reasonable chance of showers!

Cloud forecast predictions for the Sunday (as forecast Saturday morning), from Windy.com

Additionally, the predicted flight path was now trending further the south-east, with the landing now predicted somewhere between Truro and Blanchetown.

Unfortunately delaying the launch to the following weekend was not practical due to other schedule conflicts, so planning progressed for a Sunday morning launch, hoping that the forecast rain would be gone by the time of the launch.

Launch, Chase & Recovery

The morning of the launch the SHSSP participants and the AREG launch crew assembled at the launch site to overcast skies. Thankfully most of the heavier showers had fallen overnight, but a light drizzle persisted right throughout the launch.

SHSSP participants preparing the payloads

Preparations for the launch quickly got underway, with each SHSSP team working on their respective areas. Payloads were prepared, balloons filled, ground-stations setup, and by 11:30 AM everything was ready for launch.

SHSSP participants filling the balloon

Just as the count-down began, the wind picked up, resulting in one of the payloads having a bit of a bounce on the ground before the entire payload train rose slowly into the air.


After the balloon was released, the SHSSP teams headed back to the ground-station to watch the live telemetry and images, while the chase teams headed off towards the landing site (via the Truro bakery of course!). Unfortunately the SSDV website crashed about 10 minutes before the launch, so those watching from home were unable to see the live imagery.

SHSSP 2023 Flight Path

The balloon rose to a maximum altitude of 35431m (a good performance for the balloon in use) before bursting and descending. The descent was a fair bit faster than expected, later discovered to be due to about 700g of the 1600g balloon getting tangled around the parachute! For a while it looked like the payloads may end up landing a long way from a road, but the high descent rate resulted in them landing in a fairly accessible area, only a short walk from a nearby track.

The recovery teams (lead by Mark VK5QI, Liam VK5LJG, Steve VK5ST, with Don VK5KT joining us near the landing) were able to watch the payloads descend the last few hundred metres, before landing… in a tree.

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Getting the payloads out of the tree took a bit of effort with a long pole and a knife, but eventually the payloads were all cut loose. Thanks again to all those that came out on the chase!

Data Analysis

From the flight came a range of data products, including:

  • ‘Live’ radiation measurements from the Geiger Counter payload
  • Cumulative radiation dose measurements from the personal dosimeter (3 uSv dose over the flight)
  • Lots of imagery!

Some examples of imagery from the Horizon-facing camera are shown in the following gallery:

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Unfortunately the Nadir-facing imagery showed nothing but cloud, so the participants made use of the imagery captured on the Horus 58 launch for their analysis. They used the open source QGIS software to geo-reference some of the captured images, and then perform pan-sharpening of imagery of the same area captured by the Sentinel-2A earth observation satellite, essentially increasing the spatial resolution of the Sentinel imagery. The following images show an example the original low resolution (10 m), and pan-sharpened high resolution (1.5 m) imagery.

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The radiation sensor data showed similar levels to the previous Horus 58 launch, with the Pfotzer-Regener maximum observed around 20km altitude.

Radiation levels (top) observed throughout the SHSSP 2023 flight.

The telemetry data for the flight was also shown live on a data dashboard, which can be viewed at this link. 

Receiver Statistics – Horus Binary Telemetry

As with the Horus 58 flight, we saw a great response from the local amateur radio community in helping to receive telemetry. This flight saw 37 unique callsigns receiving telemetry, including three stations run by the SHSSP participants. This flight also got high enough for a few stations in Melbourne to join in on the fun!

SHSSP 2023 - SHSSP2023 Receiver Statistics

CallsignReceived PacketsPercentage of Flight ReceivedFirst-Received Altitude (m)Last-Received Altitude (m)
VK3TNU pi3-282240.3%1193529111

SHSSP 2023 - SHSSPGEIGER Receiver Statistics

CallsignReceived PacketsPercentage of Flight ReceivedFirst-Received Altitude (m)Last-Received Altitude (m)
VK3TNU pi3-298248.2%101058851

Receiver Statistics – Wenet Imagery

Unfortunately due to the failure of the SSDV website just prior to launch, we were unable to obtain statistics of who was uploading telemetry throughout the entire flight. Data was recorded until about 1 hour into the flight, and is presented below. The SSDV webpage will be back up and running for the next launch.

Thanks in particular to the stations that setup portable to try and capture as much telemetry as possible from the flight:

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Nadir-Facing Imagery

SHSSP23_1: 92090 packets (22.48 MB)
VK5QI-9: 64781 packets (15.82 MB)
VK5ST: 16 packets (0.00 MB)
VK5CLD: 4 packets (0.00 MB)
VK5LO: 44346 packets (10.83 MB)
VK5KX: 128164 packets (31.29 MB)

Outward-Facing Imagery

VK5DSP: 20904 packets (5.10 MB)
VK5QI-9: 38550 packets (9.41 MB)
VK5ALG-9: 17343 packets (4.23 MB)
VK5DSPshssp: 13084 packets (3.19 MB)
VK5AKH: 53917 packets (13.16 MB)
VK5PW: 36824 packets (8.99 MB)
VK5KX-2: 52495 packets (12.82 MB)



Even with the non-ideal weather, the SHSSP High-Altitude Balloon workshops and launch went well, with the participants certainly enjoying the experience! Thanks again to UniSA and the International Space University for letting us participate in the SHSSP again this year, and we look forward to building on this in next year’s program.

As always, a big thank you to all of our community members who get setup to track out flights, be it with a portable station, at home, or out on the chase. Keep an ear out for our next launch, which should be happening late February 2023!

SHSSP 2023 - Flight Statistics

Flight Designation:SHSSP 2023
Launch Date:2023-01-29 01:21Z
Landing Date:2023-01-29 03:43Z
Flight Duration:~2.5 hours
Launch Site:-34.02945, 138.69169
Landing Site:-34.43088, 139.41885
Distance Traveled:80.4 km
Maximum Altitude:35,431 m

Next Fox Hunt – THIS FRIDAY NIGHT (and daytime foot hunt/picnic next month)

AREGs next car-based fox hunt will be held this coming Friday the 10th of February, starting from the car park of the North Adelaide Aquatic Centre Carpark at 6:30 PM.

We’ll have three foxes deployed around the Adelaide area, on both the 2m and 70cm bands, so come along and have a go!

As usual, liaison will be on the Summertown 70cm repeater which operates on 439.900 (-5MHz) 91.5CTCSS.

The event is open to anyone with radio direction finding equipment and will span most of the Adelaide metropolitan area. We would love to see you there!

Also, next month’s hunt will be a daytime foot hunt/BYO picnic to be held on Sunday the 5th of March, kicking off at noon at Drage Reserve, Felixstow. This will be family friendly event so make sure you so SAVE THE DATE. Stay tuned for more details on this event, to be posted here in the very near future.

Horus 58 Flight Report

In January 2023, the Project Horus High-Altitude Ballooning group performed two launches, Horus 58 on the 15th of January, and the Southern Hemisphere Space Studies Program 2023 launch, on the 29th of January. This is the first of two flight reports, with the SHSSP 2023 report coming soon!

Horus 58 – Test Flight – 15th January 2023

The Horus 58 launch was intended as a flight test of the payloads to be used in the SHSSP 2023 launch, and included:

  • 2x Horus Binary telemetry payloads, one with a radiation sensor.
  • Outward-Facing Wenet Imagery
  • Nadir (Downward) Facing Wenet Imagery, with an IR filter
  • LoRaWAN Telemetry Beacon (not used in the SHSSP launch)

In particular, the radiation sensor payload (using a Geiger-Muller Tube) and the Nadir-Facing imagery payload were newly built and needed to be flight-proven to limit the chances of failure on the upcoming SHSSP 2023 launch. Also flown was a LoRaWAN payload built by Liam VK5ALG, which was received by TheThingsNetwork gateways.

Peter VK5KX’s Ground-Station, setup at the Auburn launch site.

This launch also provided a great opportunity for the local amateur radio community to get setup to receive the many telemetry signals which would be broadcast from both launches. We saw many stations receive both the low-rate Horus Binary telemetry, and the high-speed Wenet Imagery payloads.

Launch, Chase and Recovery

The launch day had excellent weather, with mild temperatures and calm winds at the launch site. Launch preparations took a little bit longer than expected due to less people around, but we were still able to get the launch in the air by 10:30 AM local time.

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With the balloon in the air, two chase teams (lead by Mark VK5QI, and Liam VK5ALG) then departed from the launch site to head off to the landing area. While making a lunch stop at the Eudunda Bakery, they were able to sight the balloon in the air, and even get a picture of the balloon before it burst at 33.359 km altitude.

Horus 58 at 33 km altitude, seen from the ground at Eudunda, SA

After burst, the chase teams headed south of Eudunda, where they met up with Steve VK5ST who was also out chasing. The payloads eventually landed a fair way into a property, but thanks to the landowner (Condor Laucke, of Laucke Mills), they were able to gain access and recover the payloads.

Payload Results

All payloads performed almost perfectly on this flight! The only small issue was seen on the Horizon-facing imagery payload, which was slightly out of focus (an easy fix once back on the ground). The Nadir (downward) facing payload took many high quality images of the ground underneath the launch site, which proved very useful to the SHSSP 2023 participants for reasons to be discussed later!

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The radiation sensor payload data clearly showed an increase in radiation levels as the payloads increased in altitude to ~20 km, and then a decrease in levels above that. This effect is known as the ‘Pfotzer-Regener Maximum’. All the sensor data from this flight can be seen on an interactive dashboard available here.

The LoRaWAN payload also performed well, being received as far away as Portland, Victoria:

Receiver Statistics – Horus Binary Telemetry

We saw a great turnout of receivers on this launch, with 30 unique callsigns receiving the Horus Binary telemetry. Thanks to all that helped receive telemetry from this flight!

Horus 58 - HORUS V2 Receiver Statistics

CallsignReceived PacketsPercentage of Flight ReceivedFirst-Received Altitude (m)Last-Received Altitude (m)
VK3TNU pi3-277240.5%2060010465

Horus 58 - HORUSGEIGER Receiver Statistics

CallsignReceived PacketsPercentage of Flight ReceivedFirst-Received Altitude (m)Last-Received Altitude (m)
VK3TNU pi3-267635.4%2063810493
VK3TNU pi3-391547.9%1265011374

Receiver Statistics – Wenet Imagery

A special thanks goes to the 7 stations that received and uploaded imagery during the flight, with a few stations setting up to receive both imagery payloads at once. Being able to see live imagery from the flight on https://ssdv.habhub.org/ really adds something special to the experience!

Outward-Facing Imagery

VK5KX-2: 140407 packets (34.28 MB)
VK5QI-9: 127137 packets (31.04 MB)
VK5DSP: 80707 packets (19.70 MB)
VK3TNUpi4-2: 31072 packets (7.59 MB)
VK5CLD: 642 packets (0.16 MB)
VK5PW: 4969 packets (1.21 MB)

Nadir-Facing Imagery

VK5LO: 15495 packets (3.78 MB)
VK5QI-9: 182410 packets (44.53 MB)
VK5PW: 140122 packets (34.21 MB)
VK3TNUpi4-1: 31590 packets (7.71 MB)
VK5KX: 245956 packets (60.05 MB)
VK5DSP: 4614 packets (1.13 MB)


Horus 58 was another highly successful flight, and provided valuable testing for the SHSSP 2023 launch. Thanks again to all who participated in the flight, through helping out at the launch site, chasing, or receiving telemetry.

Stay tuned for a report on the SHSSP 2023 launch!

Horus 58 - Flight Statistics

Flight Designation:Horus 58
Launch Date:2023-01-15 00:03Z
Landing Date:2023-01-15 02:17Z
Flight Duration:~2 hours
Launch Site:-34.02945, 138.69169
Landing Site:-34.23788, 139.13095
Distance Traveled:46.6 km
Maximum Altitude:33,359 m

Next AREG Meeting: Neil VK5KA – Measuring your Transmitter Quality – Friday 17th February

The next AREG meeting is this coming Friday, February the 17th at the Fulham Community Centre – Phelps Court, Fulham.

This month’s presentation will be from Neil Abraham, VK5KA, on the topic of transmitter quality measurements. Neil will cover practical methods of testing and optimising your transmit system, from the audio going into it, to the radio signals coming out of it. If you want to be sure your on-air signal is clean as a whistle, this is a talk not to be missed!

Doors open at 7.15pm and the presentation kicks off at 7.45. Everyone is welcome to attend. If you’ve never come along to one of our meetings, we’d love to see you there, all guests are welcome. For our remote members, the meeting will be broadcast via Zoom!

The presentation will also be live-streamed on Hayden VK7HH’s HamRadioDX Youtube Channel.

After the talks we’ll all be given an opportunity to have an eyeball QSO among ourselves whilst enjoying a tea or coffee and a biscuit.

73, Mark VK5QI