NA1SS confirms DK9JC QSO

NASA astronaut Kjell Lindgren brought joy to many radio amateurs in recent weeks when he contacted them directly from the space station via the ISS repeater, giving some a QSO with NA1SS. In the past three to four years, there were mostly no connections with the crews outside of school contacts. On Friday 22 July, NA1SS was heard over Europe in the evening, allowing European radio amateurs to make a QSO. The following day, Joshua, DL3JOP, was able to make a QSO with NA1SS at 18:08 UTC. Motivated by this, John, DK9JC, also set off with his portable equipment to hear his call confirmed by Kjell on the next overflight 1.5 h later (21:45 h local). Anyone who also wants to try their luck should have a 2 m and 70 cm directional antenna and a full duplex transceiver system. The repeater's frequencies and CTCSS can be found on the ARISS website.

FT-817 FT-818 with Gpredict

I recently bought an FT-818 to accompany my FT-817 to work portably on linear satellites. In this article I will show you how to set up Gpredict properly.

At home I use Gpredict for doppler correction under Windows. Gpredict is free software, but requires Hamlib/rigctl(d) for cat control. Hamlib is not self-explanatory because it is not a ready-made software. You have to create the individual parameters yourself. The necessary information can be found in Hamlib's Gitlab.

So you have to create a command for each transceiver. Since I use 2 transceivers for full-duplex, I have to create 2 commands.

The most important thing is to find out the ID of your transceiver. The list can be found here: https://github.com/Hamlib/Hamlib/wiki/Supported-Radios

For me it is ID 1020 for Yaesu FT-817 and 1041 for Yaesu FT-818.

FT-817 and FT-818 have slight differences in the CAT commands. Therefore there are 2 profiles. (This is also the reason why the current version of SatPC32 currently does not work with the FT-818. Only the FT-817 is supported there.)

Expedition 66 - ARISS Series 19 Lunar Exploration

After I kept seeing new SSTV images sent from the ISS on Twitter, I thought I'd give it a try too. Since I've been doing a lot of radio via FM amateur radio satellites lately anyway, I have a small 4 element LogPer directional antenna at the window anyway.

The free open source Android software "Robot36" was often recommended as software. I was very surprised when it gave a very clear picture even without a cable between my handheld radio and my mobile phone. In Robot36, however, you should select the mode manually and not leave it to chance whether "auto" works. Currently PD120 was used, which is what ARISS announced (see original message below).

I was able to achieve very good results with my Yaesu FT2 and FT4. With every pass I could decode at least 1 complete picture. The antenna was always an Anjo 4 ele logper held out of the window on a 2m wooden broomstick and the ISS was tracked via the Android app "ISS Detector".

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