1 / 14

Design of an Ultra-Stable 3 Frequency / Dual Pol. Radiometer for Remote Sensing of Rain

Soil Moisture Instrument (BNU Beijing). Design of an Ultra-Stable 3 Frequency / Dual Pol. Radiometer for Remote Sensing of Rain. T. Rose ( RPG), H. Czekala (RPG),. COPS Campaign (Black Forest / Germany). RPG’s Dual Polarized Radiometer Versions. 6.925 / 10.65 / 18.7 / 36.5 GHz

wyome
Download Presentation

Design of an Ultra-Stable 3 Frequency / Dual Pol. Radiometer for Remote Sensing of Rain

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Soil Moisture Instrument (BNU Beijing) Design of an Ultra-Stable 3 Frequency / Dual Pol. Radiometer for Remote Sensing of Rain T. Rose (RPG), H. Czekala (RPG), COPS Campaign (Black Forest / Germany)

  2. RPG’s Dual Polarized Radiometer Versions 6.925 / 10.65 / 18.7 / 36.5 GHz Soil Moisture Radiometer 10.65 / 21.0 / 36.5 GHz Rain Observation Radiometer

  3. Rain Observation Radiometer • RPG-6CH-DP • 10.65 GHz: • high rain rates >30 mm/h • 21.00 GHz: • med. rain rates >10 mm/h • 36.5 GHz: • drizzle • Discrimination of cloud liquid and rain liquid water due to polarized emission from rain droplets

  4. Dicke Switch / Noise Injection Calibration System Modular Direct Detection Filterbank Design: • High long term stability due to full auto-calibrating front end • Parallel data aquisition of all channels

  5. Waveguide DDFB Design Full waveguide design guarantees high mechanical stability Receiver Noise Temperature: < 400 K Auto-Calibration Devices: Noise Injection Magnetically switched Dicke SW

  6. Y-Junction Isolator Dicke Switch Design

  7. Y-Junction Isolator Dicke Switch for 90 GHz

  8. RPG Waveguide Dicke Switches

  9. Calibration Timing

  10. Other Receiver Examples • 90 / 150 GHz • full internal cal. • Insertion loss • 90 GHz DS: • 0.7 dB • Insertion Loss • 150 GHz DS: • 1.0 dB • Isolaton >30 dB

  11. Calibration Test of Principle with 21 / 36.5 GHz System 12 Hours

  12. Power Spectrum

  13. Allan Variance up to 4000 Seconds

  14. Thermal Receiver Stability • Hermetically insulated receivers • Thermal Stability <30 mK over full • operating temp. range (-30°C to +45 °C) • Dual stage thermal control system • Peltier stabilized receiver board • Low receiver power consumption < 3 Watts

More Related