Category: Egyéb

SMOG-1 pocket satellite reception how to

Posted on by Zoltan

You can find all the Windows, Linux, Raspberry Pi based receiver software package here:https://gnd.bme.hu:8080/ So far the “best guess” for the Kepler element data is here:https://www.celestrak.com/NORAD/elements/tle-new.txt hint: for smogcli program you need to add -i 47939 ID for reception. Stay tuned for updated TLE elements, hope NORAD can do the radar measurements and fine tune Read more about SMOG-1 pocket satellite reception how to[…]

RTL-SDR V3 based basic receiver station for SMOG-P and ATL-1 Nano Satellites

Posted on by Zoltan

SMOG-P is currently the world’s smallest _operating_ satellite as far as I know. These wonderful tiny pocket satellites are designed in Hungary by the professors and students of Budapest University of Technology and Economics: “Apart from the units ensuring its basic operations, the payload of SMOG-P is a spectrum analyzer, measuring man-made electromagnetic pollution in Read more about RTL-SDR V3 based basic receiver station for SMOG-P and ATL-1 Nano Satellites[…]

Modifying EDUP EP-AB007 4W bi-directional Wifi amplifier for OA-100 Es’hail satellite operation, non-stop TX mode

Posted on by Zoltan

4 and 8 Watt WiFi bi-directional amplifiers are designed for about 10-20 dBm input power. They listening in their input for a relatively strong signal to decide whether turn over to TX state from RX state (and changing over RF switches). Doing this simply rectifying the inrush RF power and leading that into an amplifier Read more about Modifying EDUP EP-AB007 4W bi-directional Wifi amplifier for OA-100 Es’hail satellite operation, non-stop TX mode[…]

Celebrating successful Es’hail 2 / QO-100 GEO HAM satellite WSPR transmission using only 4 milliwatts

Posted on by Zoltan

Setup:– WSPR transmitter: QRP Labs U3S kit at 2m mode WSPR, using GPS calibration (later might trying OCXO option)– 2m BPF– Morfeus converter – a Minicircuits ZX60-43-S+ RF amplifier block (single stage) – 2.4 GHz BPF– 5 turn LHCP helical and 1m parabolic dish– Virtual Audio Cable SW tool for routing web sdr audio to Read more about Celebrating successful Es’hail 2 / QO-100 GEO HAM satellite WSPR transmission using only 4 milliwatts[…]

RPITX V2 measurement plots

Posted on by Zoltan

Hi, As may many of you seen on RTL-SDR blog the RPITX V2 is out there We made several measurements booth on 434 MHz and 144 MHz and looks like the first still has difficulties while the second (144 MHz) is exceptionally clean, even with PA (1W) and almost no filtering. 434 MHz strange spuriouses Read more about RPITX V2 measurement plots[…]