Dwingeloo Radio Telescope Achieves Earth-Venus-Earth Bounce

March 25, 2025The Dwingeloo Radio Telescope has successfully bounced a radio signal off Venus and back to Earth. Transmitting at 1299.5 MHz, operators transmitted a 278 second long tone. While Dwingeloo received its own signal, the Stockert Radio Telescope located in Germany also received the same signal.

The data analysis consists of correcting the received data for both the expected Doppler shift and the rate of change of this Doppler shift due to the rotations and relative motions of Earth and Venus. After channelizing the received signal in 1 Hz frequency bins, the echo of the transmitted signal should fall exactly in the predicted bin.

Dwingeloo is planning another Venus bounce in October 2026.

Source: Dwingeloo Radio Telescope open_in_new

Monday Overdrive for March 24th, 2025

March 24, 2025Each week so much compelling content is considered for Amateur Radio Weekly but there’s always a handful of great links that just can’t fit. These are the links that didn’t make it into issue 374 of Amateur Radio Weekly.

• RADE Ham Club Presentation
  Explaining how machine learning is different from classical radio design, where we “train” an AM radio diode detector as an example.
  FreeDV
• A Simple Antenna that is Omnidirectional, Directional and NVIS?
  Purpose: to find out whether a simple idea could turn a humble vertical whip antenna into something more versatile.
  Ham Radio Outside the Box
• Transmitting Wireless Power Over Longer Distances
  Starting with small-scale proof of concept coils, the final version of the transmitter is powered off 120 VAC.
  Hackaday
• LoRa APRS Logging
  There are a few options for viewing LoRa APRS stations on the web in a map-based display.
  W0RMT
• A Vision for Open Innovation: ARDC’s Strategy at a Glance
  For the past year or so, we have been working on articulating answers to these questions, resulting in our vision statement and our accompanying strategy.
  ARDC

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Source: Amateur Radio Weekly open_in_new