SSTV from the ISS - MAI75 - June 2018

The ISS is sending SSTV Images again on the 6th and 7th of june on Orbits that pass over Moscow. As always they use a 145,8mhz Downlink and PD120 modulation that uses around 16khz of bandwidth (FM Wide).

I will use my DIY QFH Antenna at the Roof with my Airspy mini to receive the Signal for this short SSTV event.

A great ADSB LNA for only 25€

Thn adsb lna rtlsdrblog

I run my ADSB Radar now for over a year and started out with a Flightaware Pro Stick that worked very well. A few months ago i bought the very well known ADSB filtered LNA from UpUtronics that seems like it is the favorite of the community around the World.

Some weeks after i had my new LNA, the producer of the high quality RTL SDRs that many people use released a ADSB LNA. developted a 3 time filtered LNA with two gain stages that has a gain of 27db and attenuates all out of band signals at least 60db.

SSTV from the ISS - Cosmonautics day - 40 year anniversary

MI pass3 img2

The ISS is sending SSTV images from the 11th April for 3 Days on all orbits insted of only moscau passes. Mode is PD120 on the common 145.800mhz Downlink frequency.

I will mostly use my QFH and my Airspy Mini to receive the images this time. More information on my QTH page.

I will update this post at least once a day with the images i was able to receive.


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(Green = Received | Blue = partly | Black = not received)

I got all images at least once and only one is not complete. I'm very happy with that result because i only used my QFH and Airspy mini without any amplifier.

SSTV from the ISS - MAI75 - April 2nd and 3rd 2018

MO pass1 img1

The ISS will transmit images over SSTV on the 2nd and 3th April on passes that go over Moscow, Russia. They use the PD120 mode and transmit on 145.800mhz as always.

I will use my QFH on the Roof as well as my Airspy Mini sdr to recive the images. You can find more about my QTH here.

I will update this post regularly with all the images i was able to get.

HRPT - optimizations and great images!

Thn hrpt verbesserungen

I made some changes to my HRPT setup and was able to get very good images from NOAA19 for example. Take a look at my Video about the changes below:

HRPT - first images! - and my setup

Thn hrpt first images

I got into HRPT some time ago and was able to receive some nice images so far. My setup is not optimal at all, but it works quite well already. I post most of my HRPT images and other sat related stuff on my Twitter profile, follow me if you are interested :)

If you have questions, just send me an Email or contact me on Twitter etc.

First of all here is my Video about it, additional information and a few images follow further down this page.

SSTV from the ISS - MAI75 - December 2017

There is a ongoing SSTV event on the ISS from the 6th December to the 8th where the ISS is sending images in PD120 in the VHF band at 145.8mhz.

Note that it is planned to be only active on orbits that reach Moscow on the 7th and 8th.

I will update this post with my recent received images as soon as possible.

ARISS school Conatct 28th nov 2017 - Canada, Huntley Centennial Public School

There was a ARISS school contact between the Huntley Centennial Public School, Carp, ON, Canada and Paolo Nespoli on the ISS. They used the Telebridge IK1SLD in italy for making the contact to canada, while the iss was over europe, so I was in range and was able to receive most of the contact.

I used my QFH Antenna on the Roof that is connectedt with an 5m cable to my Airspy mini.

DIY AZ/EL Antenna rotator for under 150€

Thn blog diy tracker

First of all, you can find the STLs of the 3D printed parts on Thingiverse.

I was searching for a AZ/EL Antenna Tracker for my Dish and all I found was quite expensive. After some search I found the Satnogs Project and the Tracker they developt. I then started designing a rotator that follows the same principal as the Satnogs one, but with bigger and stronger stepper motors and a smaller overall size.

Listen to Astronauts on the ISS - ARISS contacts with Paolo Nespoli

After the SSTV Event on the ISS I discovered that the italian astronaut Polo Nespoli will make a few amateur radio contacts for the ARISS programm to stations around Europe in august. On these contacts the participents on earth will ask the astronaut questions, that they collected before the contact, over the amateur radio link. All voice contacts from the ISS are made over the same frequency as SSTV on 145.8 mhz. The modulation is standard FM, so almost any radio can receive it. Even a cheap Setup with either a SDR or Baofeng, like I used, works quite well.

SSTV from the ISS - ARISS 20th Anniversary - July 2017

ISS SSTV02 22 07 2017

ARISS celebrates its 20th Anniversary with a SSTV event from the International Space Station. he ISS is sending SSTV images from the 20.07.2017 (~21:25 UTC) until the 24.07.2017 (~18:00 UTC) on 145.800mhz. This time they are using the PD120 protocol, so each image only takes 2 instead of 3 minutes.

Like many others around the World, I will try to get as many images from the ISS as possible during the weekend. Unfortunately all passes of the ISS are in the middle of the night for me (and anyone around Germany) what is not that great. As the day go by, i will update this blog ost with my received images and what else was happening around it.

3D printable Universal Outernet Case - for the DIY Kit

The DIY Receiver Kit from Outernet inc. unfortunately comes without any type of case. So how you mount everything and point it to the satellite? Rubber bands and the box it comes in?

Because of that I sat down and used Fusion 360 to design a 3D printable Case for the Outernet Hardware. My goal was to make a case that can hold the CHIP, SDRx and the Antenna but is as small as possible. Also, the elevation angle of the antenna, that changes around the world, should be adjustable so it can be used everywhere. Beside that it also should look nice :)

ODC render 1

USPS maleware - Two new fake mails arrived

As described in my last post, I got a fake USPS (US Postal Service) mail on my private email account.

I got two new fake Mails that are different looking and use other domains last Friday and also today.

USPSfakemail2 USPSfakemail3

USPS maleware - check your delivery address

I got an email today on my private email account, that looked like it was from USPS (US postal service) in the first place, but obviously it was not :)

Usps spam mail

SSTV from the ISS (February) - MAI75 experiment

2017 02 14 16.23.51

Every few months, the ISS transmits pictures to be received from hams around the world. They are transmitted with a 3-minute gab between them on 145.800mhz. These images are like postcards that you can collect. For each event there are 12 different ones, that can be collected, which mostly show historical moments of space flight. The SSTV, that comes from the MAI75 experiment, was last active in December 2016, where i unfortunately had no time to receive something. At an Event before, in August 2016, I received 6 images with a DIY QFH antenna that was connected to an SDR and LNA.

The ISS was scheduled to transmit SSTV for the last two days as the February event. On Monday there was no Signal from the ISS at all, as far as I know, they had problems setting up the transmitter on the ISS. On Tuesday there were some people on twitter that got a SSTV signal from the station, so the transmitter was finally active!

Universal DIY Carbon Yagi Antenna - for only 20€

Carbon yagi folded

At the end of December 2015, I build a QFH antenna out of PVC pipe and wire for the 2m band (~137mhz). That antenna was great to receive NOAA and MeteorM2 satellites, but it struggled when I was not at the open field. In mid 2016 I bought a cheap Yagi from eBay for the 70cm band to receive for instance the SO-50 amateursat. I was blown away by the performance of that cheap Antenna and searched for a 2m Yagi that I can buy or build myself.

After some study I decided that I was not willing to pay around €130 to import a Arrow antenna from the US and instead build one.

Modellflug - Die geplanten Regulierungen machen keinen Sinn!


Als Antwort an zwei der von mir kontaktierten Politikern, habe ich folgende Argumente überlegt die den Sinn einiger der geplanten Regulierungen in frage stellen. Ich hoffe das solche Argumente von Modellfliegern dazu beitragen das die geplanten Regulierungen angepasst werden.

Zu dem Thema der Tiefflug Übungen der Bundeswehr: Regelmäßig fliegen im Moment Eurofighter über die Wohngebiete zwischen Köln und Bonn, meiner Meinung nach ist das Lärmbelästigung! Wenn ein solcher Fighter Jet auf z.B. 150m fliegen würde, wodurch eine Höhenbegrenzung von 100m gerechtfertigt wäre, dann würde dies höchstwahrscheinlich die Fensterscheiben der Häuser zerstören o.Ä. Schäden verursachen. Solche Maneuver werden und vor allem sollten nicht über Wohngebieten durchgeführt werden. Deswegen werden sich Modellflieger im Unkontrollierten Luftraum und Eurofighter niemals in den Weg kommen, was die letzten Jahrzehnte, wie bereits erwähnt, ja auch gut geklappt hat. Deswegen: Kein Grund zur Höhenbegrenzung.

Modellflug - Finger weg von meinem Hobby!


Erneut versucht die Bundesregierung, aufgrund der ansteigenden zahlen an Drohnen, den Modellflug erheblich einzuschränken. Dabei werden Modellflieger, die sich mit der Materie auskennen und sich seit Jahrzehnten an die entsprechenden Regeln halten, mit Consumern gleichgestellt. Diese rennen in ein Elektrofachgeschäft und kaufen sich eine DJI Phantom (ab jetzt als Drohne bezeichnet) o.Ä. und fliegen damit durch die Gegend. Dabei werden allerlei Regeln im Modellflug ignoriert, weil die Consumer natürlich diese nicht kennen.

Dadurch entstehen Situation wie z. B. das ein Passagierflugzeug mit einer Drohne kollidiert da dieser, verbotener weise, direkt neben dem Flughafen rumfliegt. Durch solche Vorkommnisse ist die Regierung auf die Idee gekommen, dass der Modellflug unbedingt stärker eingeschränkt und reguliert werden muss. Dabei wird auf einmal alles, was fliegt zu einer Drohne und jeder Consumer auch zu einem Modellflieger.

DIY Slider-Motorisierung - für unter 30€

Motorized slider

Vor etwa zwei Jahren habe ich mir einen einfachen Kameraslider gekauft da mir die motorisierten Varianten mit über 400€ zu Teuer waren. Der Slider war mit 130€ auch nicht der billigste, dafür hat dieser aber schon Kugellager und keine Gleithülsen welche alles andere als gut sind.

Auch wenn man eine recht ruhige Hand hat, sind die Kamerafahrten nicht so flüssig wie mit einem Motor. Deswegen hab ich mich dazu entschlossen meinen Slider selber zu motorisieren, was mich insgesamt nicht mal 30€ gekostet hat. So habe ich gegenüber einem gekauften Slider über 240€ gespart, was einiges an Geld ist.

Mein erster 3D Drucker - Zonestar D810

IMG 20161021 160744%20%281%29

Ich beschäftige mich seit etwa drei Jahren mit dem Thema 3D Druck und habe mich endlich dazu entschlossen, mir einen eigenen 3D Drucker zu kaufen. Da ich für einen solchen 3D Drucker nicht um die Tausend Euro oder mehr ausgeben wollte, habe ich mich für ein Kit entschieden, dass man selber zusammen bauen muss. Bei einem Kit bekommt man alles in Einzelteilen geliefert, was für mich aber kein Problem ist, da ich gerne Sachen selber zusammenbaue und mich mittlerweile auch mit Elektronik ganz gut auskenne.

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