General Model for Calculating Infrared-Radiation Intensity of Aerial Target and Its Application

Yuanxing He; Haoyuan Zhang; Wentao Si; Tongbang Wu; Junlian Cheng

doi:10.3788/AOS201939.0612007

Journals >Acta Optica Sinica >Volume 39 >Issue 6 >Page 0612007 > Article

Acta Optica Sinica
Vol. 39, Issue 6, 0612007 (2019)

General Model for Calculating Infrared-Radiation Intensity of Aerial Target and Its Application

Yuanxing He^*, Haoyuan Zhang, Wentao Si, Tongbang Wu, and Junlian Cheng

Author Affiliations

95859 Army Unit PLA, Jiuquan, Gansu 735018, China

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DOI: 10.3788/AOS201939.0612007 Cite this Article Set citation alerts

Yuanxing He, Haoyuan Zhang, Wentao Si, Tongbang Wu, Junlian Cheng. General Model for Calculating Infrared-Radiation Intensity of Aerial Target and Its Application[J]. Acta Optica Sinica, 2019, 39(6): 0612007 Copy Citation Text

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Fig. 1. Imaging sketch of target on focal plane array infrared detector

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Fig. 2. Variations of target slope distance and observational elevation angle with time

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Fig. 3. Variation of middle infrared atmospheric apparent radiation intensity with diameter of target

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Fig. 4. Variation of long infrared atmospheric apparent radiation intensity with diameter of target

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Target diameter /m	Target image size /pixel	Mid-wave infrared radiation (3.7-4.8 μm)			Long-wave infrared radiation (8.0-9.2 μm)
Target diameter /m	Target image size /pixel	Δ /(W·sr^-1)	I_theory /(W·sr^-1)	$\frac{Δ}{I_{theory}}$ /%	Δ /(W·sr^-1)	I_theory /(W·sr^-1)		$\frac{Δ}{I_{theory}}$ /%
0.3	1	0.00086		0.05			1.72		0.052	0.56	9.29
0.5	2	0.00240		0.14			1.71		0.145	1.55	9.35
1.0	3	0.00950		0.55			1.73		0.580	6.19	9.37
2.0	9	0.03820		2.20			1.74		2.320	24.74	9.38
3.0	13	0.08600		4.96			1.73		5.220	55.67	9.38
5.0	22	0.24000		13.77			1.74		14.490	154.64	9.37
8.0	35	0.61000		35.26			1.73		37.100	395.87	9.37

Table 1. Middle- and long-wave infrared atmospheric apparent radiation intensity of different geometry targets and its proportion

No.	Target distance /km	Elevation angle /(°)	Target altitude /km	Mid-wave infrared radiation intensity /(W·sr^-1)
1	18	15.20	4.71	0.2636
2	17	16.20	4.73	0.2617
3	16	17.19	4.72	0.2698
4	15	18.42	4.73	0.2751
5	14	19.82	4.74	0.2818
6	13	21.37	4.73	0.2970

Table 2. Calculation results of dynamic test data of middle-wave infrared small target

No.	Target distance /km	Elevation angle /(°)	Target altitude /km	Image size /(pixel×pixel)	Mid-wave infrared radiation intensity /(W·sr^-1)	Long-wave infrared radiation intensity /(W·sr^-1)
1	9.7	29.3	4.740	30×30	0.5534	9.8829
2	9.8	29.0	4.739	30×30	0.5900	9.8769
3	9.9	28.7	4.742	30×30	0.5462	9.3779
4	10.0	28.3	4.728	30×30	0.5261	9.7281
5	10.1	27.9	4.726	30×30	0.5373	9.5847

Table 3. Calculation results of dynamic test data for extended target

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