How to – digipeat a compressed APRS packet via Duchifat

Dear all,
The registration process for DUCHIFAT-1 is open and functional. Please register and transmit your COMPRESSED APRS packets to the satellite.
It might take us few days between satellite dumps according to the students schedule..

After successfull dumps all stations received by the satellite will appear on our site map, and a QSL card will be sent back….

The site contains several guides:
1. A walk through the registration process
2. Terms of use on how to use the satellite
3. How to configure the Byonics TinyTrak4 for generating the right packets
4. S/W and installation guide for telemetry decoding

Link: http://www.h-space-lab.org

good luck!
73
The HSC team


… it was quite easy. After the registration process I used the online generation tool. You will receive also a e-mail with your commpressed APRS string.

duchifat_compressed_code_website

Simply send this string to the satellite. I used my old hardware TNC (TNC-2 clone) and I am sure it will work also with other TNC’s or soundcard solutions.
Duchifat is very sensitive. It worked with low elevations and less than 20 watts.

The uplink is 435.220 MHz (1k2 AFSK), the downlink is 145.980 MHz (1k2 BPSK). The satellite call sign is 4X4HSL.

duchifat_digipeat_small
the last packet is the confirmation packet

C0 00 8E A6 40 40 40 40 00 68 B0 68 90 A6 98 00 03 F0 21 22 35 41 4B 45 50 66 24 29 56 21 21 5F C0 

À.Ž¦@@@@.h°h¦˜..ð!”5AKEPf$)V!!_À

duchifat_digipeater_map
if you are successful you will find your callsign on the world map

 

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