Simulation of the Spectrum Response for the THz Atmosphere Limb Sounder (TALIS)
Alternative TitleWOS:000517790100172;20200408086768
Duan, Yongqiang1; Wang, Zhenzhan; Xu, Haowen1; Wang, Wenyu1
Source PublicationSENSORS
KeywordTHz atmosphere limb sounder (TALIS) FFT spectrometer simulation model performance evaluation calibration sideband imbalance quantization error JEM/SMILES ABOARD ODIN SATELLITE MLS SPECTROMETER UARS
AbstractThe THz atmospheric limb sounder (TALIS) is a microwave radiometer developed by the National Space Science Center of the Chinese Academy of Sciences for the detection of atmospheric trace gases. The observation range of the instrument mainly focuses on the middle and upper atmosphere (10-100 km above the earth's surface). The detection targets include the temperature, pressure, and more than 10 kinds of atmospheric components. Its scientific goal is to improve our comprehension of atmospheric chemical composition and dynamics, and to monitor environmental pollution and sources in the atmosphere. The TALIS instrument is composed of an antenna, superheterodyne radiometers, and digital fast Fourier transform (FFT) spectrometers. By measuring the atmospheric thermal radiance in the wide frequency band with 118, 190, 240, and 643 GHz as the center frequency, the required volume mixing ratio (VMR) of atmospheric chemical species can be obtained. This paper introduces the characteristics of the TALIS instrument, and establishes a simulation model for the TALIS spectrometer. Through a joint simulation with an atmosphere radiative transfer simulator (ARTS), the TALIS instrument performance is evaluated from the aspects of calibration, the imbalance of two sidebands, the spectrum resolution, and quantization. The simulation results show that the two-point calibration can well-restore the radiance spectrum of the scene target and remove the influence of the spectral response function (SRF); the double side band (DSB) receiver with a 2 MHz resolution can meet the sensitivity and spectrum resolution requirements. Finally, the sensitivity errors of different quantization bits are given by the simulation and the results show that at 8-bit, the sensitivity and its degradation ratio are 1.251 K and 1.036 at a 2 MHz spectrum resolution and 100 ms integration time, respectively.
Indexed BySCI ; EI
Citation statistics
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Microwave Remote Sensing, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100094, Peoples R China
Recommended Citation
GB/T 7714
Duan, Yongqiang,Wang, Zhenzhan,Xu, Haowen,et al. Simulation of the Spectrum Response for the THz Atmosphere Limb Sounder (TALIS)[J]. SENSORS,2020,20(2):498.
APA Duan, Yongqiang,Wang, Zhenzhan,Xu, Haowen,&Wang, Wenyu.(2020).Simulation of the Spectrum Response for the THz Atmosphere Limb Sounder (TALIS).SENSORS,20(2),498.
MLA Duan, Yongqiang,et al."Simulation of the Spectrum Response for the THz Atmosphere Limb Sounder (TALIS)".SENSORS 20.2(2020):498.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Duan, Yongqiang]'s Articles
[Wang, Zhenzhan]'s Articles
[Xu, Haowen]'s Articles
Baidu academic
Similar articles in Baidu academic
[Duan, Yongqiang]'s Articles
[Wang, Zhenzhan]'s Articles
[Xu, Haowen]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Duan, Yongqiang]'s Articles
[Wang, Zhenzhan]'s Articles
[Xu, Haowen]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.