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FY-3C微波湿温探测仪辐射测量特性

郭杨 卢乃锰 谷松岩 何杰颖 王振占

郭杨, 卢乃锰, 谷松岩, 等. FY-3C微波湿温探测仪辐射测量特性. 应用气象学报, 2014, 25(4): 436-444..
引用本文: 郭杨, 卢乃锰, 谷松岩, 等. FY-3C微波湿温探测仪辐射测量特性. 应用气象学报, 2014, 25(4): 436-444.
Guo Yang, Lu Naimeng, Gu Songyan, et al. Radiometric characteristics of FY-3C microwave humidity and temperature sounder. J Appl Meteor Sci, 2014, 25(4): 436-444.
Citation: Guo Yang, Lu Naimeng, Gu Songyan, et al. Radiometric characteristics of FY-3C microwave humidity and temperature sounder. J Appl Meteor Sci, 2014, 25(4): 436-444.

FY-3C微波湿温探测仪辐射测量特性

资助项目: 

国家高技术863计划 2011AA12A104

公益性行业 (气象) 科研专项 GYHY201206002

国家自然科学基金项目 41201360

详细信息
    通信作者:

    卢乃锰, email: lunm@cma.gov.cn

Radiometric Characteristics of FY-3C Microwave Humidity and Temperature Sounder

  • 摘要: 2013年9月发射的FY-3C是我国第2代极轨气象卫星的第3颗星,其上装载的微波湿温探测仪在118 GHz氧气吸收线和183 GHz水汽吸收线设计了两组大气探测通道,在大气窗区设置了89 GHz和150 GHz探测通道。为保证微波湿温探测仪在轨定量应用,卫星发射前完成了地面热真空试验。该文介绍了热真空定标试验原理,并对FY-3C微波湿温探测仪正样产品真空试验数据进行了定量分析。数据分析结果表明:FY-3C微波湿温探测仪正样产品15个探测通道的灵敏度均满足设计指标要求,各通道观测亮温间相对独立,定标准确度优于1.6 K,真空试验过程中微波湿温探测仪定标结果稳定。FY-3C微波湿温探测仪发射前热真空定标特性分析结果为仪器在轨定量应用奠定了基础。
  • 图  1  真空罐内微波湿温探测仪和冷源及变温源之间的位置关系

    Fig. 1  Facility for thermal vacuum test of the microwave humidity and temperature sounder

    图  2  微波湿温探测仪热定标源PRT测温结果 (a)89/118 GHz,(b)150/183 GHz

    Fig. 2  PRT temperature distribution of 89/118 GHz (a) and 150/183 GHz (b) warm target

    图  3  微波湿温探测仪热源、冷源和变温源观测计数值

    (a)89/118 GHz,(b)150/183 GHz

    Fig. 3  Accordance analysis of warm, cold and variable target view in scan lines

    (a)89/118 GHz, (b)150/183 GHz

    图  4  微波湿温探测仪各通道两点定标结果偏差分布特征

    Fig. 4  The calibration bias distribution of the microwave humidity and temperature sounder

    图  5  仪器灵敏度随平滑窗长度的变化

    Fig. 5  The variation of ΔNet with the number of scan lines included in the average windows

    表  1  微波湿温探测仪主要应用目的和通道特性参数

    Table  1  The microwave humidity and temperature sounder channel characteristics

    序号中心频率/GHz极化带宽/MHz主波束宽度主波束效率
    189V15002.0°>92%
    2118.75±0.08H202.0°>92%
    3118.75±0.2H1002.0°>92%
    4118.75±0.3H1652.0°>92%
    5118.75±0.8H2002.0°>92%
    6118.75±1.1H2002.0°>92%
    7118.75±2.5H2002.0°>92%
    8118.75±3.0H10002.0°>92%
    9118.75±5.0H20002.0°>92%
    10150V15001.1°>95%
    11183.31±1.0H5001.1°>95%
    12183.31±1.8H7001.1°>95%
    13183.31±3.0H10001.1°>95%
    14183.31±4.5H20001.1°>95%
    15183.31±7.0H20001.1°>95%
    下载: 导出CSV

    表  2  非线性订正后微波湿温探测仪各通道最大亮温偏差

    Table  2  Max bias of brightness temperature after nonlinear correction

    通道号各仪器温度下的最大亮温偏差/K
    5℃15℃25℃
    10.330.230.20
    20.400.500.24
    30.140.130.10
    40.170.230.15
    50.200.090.16
    60.140.170.16
    70.160.190.13
    80.180.230.13
    90.150.160.15
    100.170.240.17
    110.140.250.08
    120.140.130.12
    130.170.270.19
    140.190.290.35
    150.280.190.15
    下载: 导出CSV

    表  3  微波湿温探测仪各通道灵敏度

    Table  3  Radiometric sensitivity values for the microwave humidity and temperature sounder

    通道号灵敏度指标/K各仪器温度下的灵敏度/K
    5℃15℃25℃
    11.00.2260.3010.257
    23.61.7901.7631.663
    32.00.6790.7010.686
    41.60.5480.5910.568
    51.60.6350.4750.485
    61.60.5350.5190.470
    71.60.5380.5440.511
    81.00.3100.2810.306
    91.00.4210.4050.304
    101.00.2960.3070.289
    111.00.4560.3600.393
    121.00.3710.2840.350
    131.00.2310.2660.250
    141.00.2870.2400.266
    151.00.2820.3090.249
    下载: 导出CSV

    表  4  微波湿温探测仪各通道观测亮温的相关系数

    Table  4  Correlation maxrtix for the microwave humidity and temperature sounder

    通道号123456789101112131415
    110.0910.0500.005-0.0890.049-0.103-0.043-0.0090.1010.1160.040-0.042-0.135-0.016
    20.0911-0.0830.0010.036-0.0160.085-0.190-0.015-0.0240.105-0.0010.039-0.029-0.004
    30.050-0.08310.1600.019-0.0420.1330.0730.1140.065-0.0600.013-0.086-0.121-0.079
    40.0050.0010.16010.0150.0740.0360.08200.0160.041-0.158-0.0030-0.034
    5-0.0890.0360.0190.01510.0590.0370.0120.0510.024-0.033-0.0420.023-0.054-0.106
    60.049-0.016-0.0420.0740.05910.0110.1040.078-0.109-0.087-0.100-0.033-0.033-0.099
    7-0.1030.0850.1330.0360.0370.01110.3430.190-0.144-0.031-0.042-0.055-0.0080.025
    8-0.043-0.1900.0730.0820.0120.1040.34310.554-0.083-0.059-0.077-0.1490.031-0.021
    9-0.009-0.0150.11400.0510.0780.1900.5541-0.020-0.0490.109-0.0520.0680.037
    100.101-0.0240.0650.0160.024-0.109-0.144-0.083-0.02010.0980.1230.0720.1110.028
    110.1160.105-0.0600.041-0.033-0.087-0.031-0.059-0.0490.09810.1490.2000.0880.075
    120.040-0.0010.013-0.158-0.042-0.100-0.042-0.0770.1090.1230.14910.3020.0730.184
    13-0.0420.039-0.086-0.0030.023-0.033-0.055-0.149-0.0520.0720.2000.30210.2440.274
    14-0.135-0.029-0.1210-0.054-0.033-0.0080.0310.0680.1110.0880.0730.24410.254
    15-0.016-0.004-0.079-0.034-0.106-0.0990.025-0.0210.0370.0280.0750.1840.2740.2541
    下载: 导出CSV
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出版历程
  • 收稿日期:  2013-08-27
  • 修回日期:  2014-04-08
  • 刊出日期:  2014-07-31

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