風云三號(D)氣象衛(wèi)星微波濕溫度計系統(tǒng)建模和仿真
doi: 10.11999/JEIT190507 cstr: 32379.14.JEIT190507
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1.
中國科學院國家空間科學中心 微波遙感重點實驗室 北京 100190
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2.
中國科學院大學 北京 100190
基金項目: 國家重點研發(fā)計劃(2018YFB0504900)
Modeling and Simulating of Microwave Humidity and Temperature Sounder Onboard the FY-3(D) Satellite
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1.
Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China
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2.
University of Chinese Academy of Sciences, Beijing 100190, China
Funds: The National Key R&D Program of China (2018YFB0504900)
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摘要:
針對風云三號衛(wèi)星微波濕溫度計，該文建立了全功率式微波輻射計系統(tǒng)的仿真模型，重點對熱輻射噪聲源、混頻器、低噪放、濾波器與檢波器等關鍵性器件進行了參數(shù)化建模。從信號處理的角度對全功率式微波輻射計的工作過程進行了模擬，并對仿真系統(tǒng)的輸出功率、靈敏度和線性度進行評估與分析。通過與實際儀器的測試結果對比，驗證了所提仿真模型的正確性。
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關鍵詞:
- 風云三號(D)氣象衛(wèi)星 /
- 微波濕溫度計 /
- 全功率式微波輻射計 /
- 毫米波系統(tǒng)建模 /
- 計算機仿真
Abstract:A simulation model of total power microwave radiometer is developed for the microwave humidity and temperature sounder onboard the FY-3 satellite. The key components such as mixer, low noise amplifier, local oscillator, filter and detector are parametrically modeled. The model is studied from the aspect of signal processing, and dynamic range, sensitivity and linearity of the simulation system are evaluated and analyzed. The correctness of the simulation model is verified by comparing them with the test results of the actual system.
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表 2 各級功率輸出與檢波電壓輸出結果
仿真功率(dBm) 實際功率(dBm) 3 K 340 K 3 K 340 K 濾波器 –10.75 –9.34 –10.69 –9.27 仿真檢波電壓(mV) 實際檢波電壓(mV) 檢波器 20.21 27.92 20.04 27.56 
下載: 導出CSV
表 3 系統(tǒng)線性度仿真結果
$\Delta G/G$(%) ${T_{\rm in} }(\rm K)$ ${V_{\rm C} }(\rm mV)$ ${V_{\rm H} }(\rm mV)$ ${V_{\rm out} }(\rm mV)$ $a$ $b$ ${T_{\rm out} }(\rm K)$ $\Delta T(\rm K)$ 0.024 3 20.63 27.59 17.75 30.17 –532.46 3.10 –0.10 0.057 80 20.65 27.64 20.32 30.04 –530.39 80.09 –0.09 0.055 160 20.67 27.64 22.99 30.13 –532.77 159.90 0.10 0.042 240 20.63 27.59 25.60 30.17 –532.46 239.96 0.04 0.039 320 20.74 27.74 28.41 30.00 –532.20 320.10 –0.10
下載: 導出CSV
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