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首页> 外文会议>International symposium on photoelectronic detection and imaging;ISPDI 2011 >Design and calibration of the solar irradiance monitor
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Design and calibration of the solar irradiance monitor

机译：太阳辐照度监测仪的设计和校准

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The solar irradiance monitor (SIM), with the design accuracy of 5‰, used to monitor the secular changes of the total solar irradiance on FY-3 satellite, takes the sun-scanning measurement method on-orbit. Compared to the sun-tracking measurement method, this method simplifies the structure and cuts the cost, but the measuring accuracy is affected by the sun-synchronous orbit, sunlight incidence angle and the installing angle of the SIM in the satellite. Through the ground calibration experiment, studies on the affection of different sunlight incidence angles to the measurement accuracy. First, by the satellite tool kit (STK) simulation software, simulates the orbital parameters of the sun-synchronous satellite, and calculates the Sun ascension and declination at any time. By the orbit coordinate transformation matrix gets the components of the Sun vectors to the axes of the satellite, and base on the components designs the field of view and the installing angles of the SIM. Then, designs and completes the calibration experiment to calibrate the affection of the incidence angles. Selecting 11 different angles between the sunlight and the satellite X-axis, measures the total solar irradiance by the SIM at each angle, and compares to the irradiances of the SIAR reference radiometers, and gets the coefficient curves of the three channels of the SIM. Finally, by the quadratic fitting, gets the correction equations on the incidence angles: R_1=5.71×10~(-5) α~2-2.453×10~(-3)α+1.0302 , R_2=2.84×10~(-5)α~2-l.965×10~(-3)α+1.0314 and R_3=l.72×10~(-5) α~2-4.184×10~(-4)α+0.9946. The equations will improve the on-orbit measurement accuracy of the solar irradiance, and are very important to the on-orbit data processing after the satellite launched.
机译：太阳辐照度监测器（SIM）的设计精度为5‰，用于监视FY-3卫星上总太阳辐照度的长期变化，采用在轨太阳扫描测量方法。与太阳跟踪测量方法相比，该方法简化了结构并降低了成本，但是测量精度受太阳同步轨道，太阳入射角和SIM在卫星中的安装角度的影响。通过地面标定实验，研究了不同阳光入射角对测量精度的影响。首先，通过卫星工具套件（STK）模拟软件，模拟太阳同步卫星的轨道参数，并随时计算太阳的上升和偏角。通过轨道坐标变换矩阵，将太阳矢量的分量传递到卫星的轴上，并根据这些分量设计SIM卡的视场和安装角度。然后，设计并完成校准实验，以校准入射角的影响。在太阳光和卫星X轴之间选择11个不同的角度，通过SIM在每个角度测量总太阳辐照度，并与SIAR参考辐射计的辐照度进行比较，并获得SIM的三个通道的系数曲线。最后通过二次拟合得到入射角的校正方程：R_1 = 5.71×10〜（-5）α〜2-2.453×10〜（-3）α+ 1.0302，R_2 = 2.84×10〜（- 5）α〜2-l.965×10〜（-3）α+ 1.0314和R_3 = l.72×10〜（-5）α〜2-4.184×10〜（-4）α+ 0.9946。这些方程将提高太阳辐照度的在轨测量精度，对于卫星发射后的在轨数据处理非常重要。

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