SatNOGS station 2380

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Piszkéstető UHF

The Piszkéstető UHF station is a SatNOGS-capable satellite receiver station, suitable for receptions in the passband between 435 and 438 MHz. The station is based on the following components:

  • SPID RAS rotator with off-the-shelf controller;
  • 2x2 stacked WIMO X-Quad 70 cm UHF antennas (including the appropriate phase line);
  • Aluminium tubes (40x2, 60x2);
  • Cross mast clamps (for the H-shaped antenna support structure, for the counterweight) and distance mast clamps (for connecting the 60mm support tube to the bar);
  • Wilkinson power combiner;
  • An SSB SP-70 preamplifier (low-noise amplifier, LNA);
  • N-N bias tee;
  • N-N cables (H155, 4x 1m, exactly the same length to connect the antennas to the Wilkinson power combiner, 3m, to connect the power combiner with the LNA);
  • An appropriately long N-N cable (H155, between the LNA and the bias tee);
  • A shorter N-SMA cable (betweem the bias tee and the dongle);
  • RTL-SDR dongle (v3);
  • Lots of ferrite beads;
  • PC Engines APU2 with Devuan single-board computer; and
  • software stack extensions atop satnogs-client, enabling custom pre/postprocessing scripts and additional real-time packet decoding hooks.

Our infrastructure for this station infrastructure is supported by the same grants which funded the GRBAlpha mission, an 1U CubeSat for in-orbit performance tests of detectors suitable for small form-factor gamma-ray burst detections. The station also regularly receives the SMOG-1 PocketQube as well as the missions VZLUSAT-2, BDSat and Planetum-1. The aim of the custom extensions atop the satnogs-client is to allow the real-time decoding of GRBAlpha, VZLUSAT-2, BDSat and Planetum-1 packets and transfer the packets to the interactive ground control software with a minimal (≲ 10-20ms) latency while keeping a 100% compatible interfacing to the SatNOGS system at the same time. Our real-time packet forwarding is merged with additional stations, most prominently the Jablonec SatNOGS station. Additional extensions allows the proper unwinding of the antenna and rotator cabling in advance of the passes.

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