Detection and Correction of Fringe Count Error in Spaceborne Infrared Hyperspectral Fourier Transform Spectrometer

Chang Liu; Hailiang Shi; Zhiwei Li; Chunqiang Wu; Chengli Qi; Wei Xiong

doi:10.3788/AOS202040.1630002

Acta Optica Sinica, Volume. 40, Issue 16, 1630002(2020)

Detection and Correction of Fringe Count Error in Spaceborne Infrared Hyperspectral Fourier Transform Spectrometer

Chang Liu^1,2,3, Hailiang Shi^1,2,3, Zhiwei Li^1,3, Chunqiang Wu⁴, Chengli Qi⁴, and Wei Xiong^1,2,3、*

¹Anhui Institute of Optics and Fine Mechanics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China

²University of Science and Technology of China, Hefei, Anhui 230026, China

³Key Laboratory of Optical Calibration and Characterization of Chinese Academy of Sciences, Hefei, Anhui 230031, China

⁴Key Laboratory of Radiometric Calibration and Validation for Environmental Satellite, National Satellite Meteorological Center, Beijing 100081, China

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Figures & Tables(11)

Fig. 1. Interferogram diagram when FCE occurs

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Fig. 2. Effect of FCE at different positions on phase

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Fig. 3. Effect of FCE at different positions on spectrum. (a) Overall view; (b) partial enlargement

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Fig. 4. Effects of FCE at different positions on phase difference and spectral deviation. (a) Effect on phase difference; (b) effect on spectral deviation

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Fig. 5. Schematics of FCE detection. (a) Interference data with FCE; (b) phase extraction function; (c) phase of phase extraction function

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Fig. 6. FCE calibration results. (a) Spectral phase of the interferogram with FCE; (b) linearly fits the phase extraction function; (c)phase contrast chart after FCE correction; (d) spectrum contrast chart after FCE correction

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Fig. 7. FCE correction in earth scene. (a) Phase extraction function linear fitting in earth scene; (b) phase comparison before and after correction

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Fig. 8. Test results of actual data

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Table 1. FCE error simulation parameters
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Table 1. FCE error simulation parameters
Parameter Value
Spectral range /cm^-1 648 to 1136
Spectral resolution /cm^-1 0.625
Sampling point 19456
Lost point 1
Lost position left edge,center,right edge

Table 2. Instrument related parameters
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Table 2. Instrument related parameters
Parameter Technical indicator
Scan cycle /s 10
Residence steps 40
Effective residence steps 33
Scan times 30
Wave band Longwave, midwave,shortwave

Table 3. Algorithm detection and correction under different FCE conditions

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Table 3. Algorithm detection and correction under different FCE conditions

FCE appear position		Calculatedoffset points	Fitted variance	Phase differencebefore correction	Phase differenceafter correction
	One point lost	1.0319	0.2352	339.2286	21.1
Left	Three points lost	3.0375	0.2305	1045.2	35.2764
	Five points lost	5.1713	0.2348	693.9244	28.8488
	One point lost	0.9362	8.0109	339.2195	21.0571
Center	Three points lost	3.0353	0.1853	1045.3	35.2145
	Five points lost	5.1674	0.1694	694.767	28.7564

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Chang Liu, Hailiang Shi, Zhiwei Li, Chunqiang Wu, Chengli Qi, Wei Xiong. Detection and Correction of Fringe Count Error in Spaceborne Infrared Hyperspectral Fourier Transform Spectrometer[J]. Acta Optica Sinica, 2020, 40(16): 1630002

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