[aprssig] Another APRS Satellite: Duchifat1
n0agi at n0agi.com
Fri Jul 17 14:44:04 EDT 2015
Just registered and I have received my compressed APRS packet that includes the user specific/assigned 2 byte symbol in it, to send as part of my beacon
Couple of questions:
1. is there a "VIA Path" we should send our packets thru ?
2. what will be the sat's digi's callsign?
3. is there a pass-thru prediction TLE data URL that I can download the TLE data from
4. Lastly, when does this "party begin" :)
Bob, Thanks for sharing this progress - sounds exciting; I look forward to participating
From: aprssig [mailto:aprssig-bounces at tapr.org] On Behalf Of Robert Bruninga via aprssig
Sent: Friday, July 17, 2015 7:12 AM
To: aprssig at tapr.org
Subject: [aprssig] Another APRS Satellite: Duchifat1
Below describes how the Duchifat1 satellite has been converted to receive APRS and downlink it later to their command station for their map:
You must use APRS "Compressed" format using normal APRS at 1200 baud on UHF channel 435.220 MHz and get a special 2 byte "callsign" to make the packet small enough (14 bytes) to fit in their limited protocol. To register go
Or generally see their details on
They have announced a new tool called the 'APRS Encoder', that can generate for you the COMPRESSED APRS packet for Duchifat1.
The input for the new APRS Encoder is the station's coordinates for stationary base stations and can then be simply typed into any TNC for transmission. Or use any APRS system that can set compressed mode, such as the Byonics TT4.
The output of the APRS Encoder is a 14 character long Compressed APRS packet that can be converted to 1200bd AFSK with a hardware TNC or software like MIXW – just copy the 14 chars string and paste it into the MIXW window.
All the details on the satellite, the registration and the APRS Encoder are at this link: www.h-space-lab.org
73 from 4X4HSC team: instructors 4Z1WS and 4X1DG, and the students!
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