本文選題：紅外 + 天空亮度��； 參考：《紅外與激光工程》2017年10期

【摘要】：傳統(tǒng)一元定標(biāo)法測量紅外天空亮度,面臨諸多困難,如測量易受環(huán)境溫度變化影響、儀器動態(tài)范圍不足等。提出增加積分時間為自變量的二元定標(biāo)模型,解決了儀器動態(tài)范圍不足的問題;然后通過改變環(huán)境溫度的系列實(shí)驗(yàn),掌握了二元定標(biāo)模型中儀器輻射隨環(huán)境溫度變化的規(guī)律;基于此,提出再增加環(huán)境溫度為自變量的三元定標(biāo)模型。實(shí)驗(yàn)數(shù)據(jù)表明,三元模型與實(shí)測數(shù)據(jù)擬合程度很高,相關(guān)系數(shù)為1.000,模型參數(shù)a、b、d,95%置信度的相對不確定度均小于0.82%,當(dāng)環(huán)境保持某一溫度不變時,三元模型退化為二元模型,各模型參數(shù)穩(wěn)定,其相對偏差小于0.6%。最后,通過紅外天空亮度實(shí)測,驗(yàn)證并比較了三元和二元定標(biāo)模型;結(jié)果表明,三元模型定標(biāo)測量法使用條件寬泛,既擴(kuò)大了儀器動態(tài)范圍,又不受環(huán)境溫度變化影響;更重要的是,不再需要現(xiàn)場定標(biāo),提高了測量精度和測試效率。
[Abstract]:It is difficult to measure the brightness of infrared sky by traditional calibration method, for example, the measurement is easy to be affected by the change of environment temperature, the dynamic range of instrument is insufficient, and so on. A binary calibration model with increasing integral time as independent variable is proposed to solve the problem of insufficient dynamic range of the instrument, and then through the series of experiments of changing the ambient temperature, the law of the variation of the instrument radiation with the ambient temperature in the binary calibration model is grasped. Based on this, a ternary calibration model with additional ambient temperature as independent variable is proposed. The experimental data show that the fitting degree between the ternary model and the measured data is very high, the correlation coefficient is 1.000, and the relative uncertainty of the 95% confidence degree of the model parameter is less than 0.82.The ternary model degenerates into a binary model when the environment keeps a certain temperature constant. The parameters of each model are stable and the relative deviation is less than 0.6. Finally, the ternary calibration model and binary calibration model are verified and compared by infrared sky luminance measurement. The results show that the ternary model calibration method is widely used, which not only expands the dynamic range of the instrument, but also is not affected by the change of ambient temperature. More importantly, there is no need for field calibration, which improves the accuracy and efficiency of measurement.
【作者單位】： 中國科學(xué)院云南天文臺;中國科學(xué)院大學(xué);中國科學(xué)院天文大科學(xué)研究中心;昆明物理研究所;云南師范大學(xué);
【基金】：國家自然科學(xué)基金聯(lián)合基金(U1231117,U1431122) 江蘇省自然科學(xué)基金(BK20170566) 物質(zhì)科學(xué)前沿與交叉研究Ⅱ(紅太陽物理)
【分類號】：P111;TN21

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1 郝允祥，張保洲;夜間天空亮度及其測量[J];云南天文臺臺刊;1996年03期

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本文編號：1864629