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<p>We describe a cost-effective microwave radiometer designed for routine remote observations of natural environments in the 3-mm microwave band under field conditions. The radiometer is designed for long-term operation in field experiments, ensuring high measurement stability. The operating principle is based on an automatic adjustment method that sets the measurement path to a zero-balance state using synchronously performed pulse-width and amplitude modulations. The fluctuation sensitivity is 0.1 K with a signal integration time of 1 s, and its absolute accuracy is ±1 K in the temperature range from -20 to +40 degrees Celsius.</p>

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Passive Microwave Radiometer of the 3-mm Wavelength Range for Routine Observations of Natural Environments

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • A. V. Filatov,
  • D. A. Pokamestov,
  • Ya. V. Kryukov,
  • A. S. Shinkevich,
  • G. A. Shalin

摘要

We describe a cost-effective microwave radiometer designed for routine remote observations of natural environments in the 3-mm microwave band under field conditions. The radiometer is designed for long-term operation in field experiments, ensuring high measurement stability. The operating principle is based on an automatic adjustment method that sets the measurement path to a zero-balance state using synchronously performed pulse-width and amplitude modulations. The fluctuation sensitivity is 0.1 K with a signal integration time of 1 s, and its absolute accuracy is ±1 K in the temperature range from -20 to +40 degrees Celsius.