The Antenna That Wouldn't Stop Growing

说明与用途

通过调校天线并使用高质量RTL‑SDR，成功捕获METEOR‑M气象卫星的清晰图像。

问题

Unable to receive clear weather satellite images due to poor signal quality from an untuned antenna and inadequate setup.

结果

By tuning the dipole antenna to the correct dimensions and using a higher quality RTL‑SDR dongle, the hobbyist successfully captured clear weather images from METEOR‑M satellites, turning a black‑strip failure into usable data.

工作流

• 1. Purchase RTL‑SDR Blog V3 dongle with bias‑tee and stable oscillator.
• 2. Set up telescopic dipole antenna: extend each arm to 53.4 cm and angle 120°.
• 3. Identify target satellite (METEOR‑M2‑3 or M2‑4) and its 137 MHz downlink frequency via N2YO.
• 4. Use SatDump to point at frequency, record the ~10‑minute pass, and decode.
• 5. Verify signal quality; adjust antenna orientation if image remains poor.
• 6. Repeat for subsequent passes to build a library of images.

证据

The satellite came over, right on schedule… I recorded the pass. I ran the decoder. And out came… a black strip.

来源

For the 137 MHz band, the recommendation is very specific: each arm should be 53.4 cm long, with a 120° angle between them.

来源