In-Orbit Test of the Polarized Scanning Atmospheric Corrector (PSAC) Onboard Chinese Environmental Protection and Disaster Monitoring Satellite Constellation HJ-2 A/B

Li, Zhengqiang; Xie, Yisong; Hou, Weizhen; Liu, Zhenhai; Bai, Zhaoguang; Hong, Jin; Ma, Yanhui; Huang, Huaguo; Lei, Xuefeng; Sun, Xiaobing; Liu, Xiao; Yang, Benyong; Qiao, Yang; Zhu, Jun; Cong, Qian; Zheng, Yunpu; Song, Maoxin; Zou, Peng; Hu, Zhongzheng; Lin, Jun; Li, Fan

doi:10.1109/tgrs.2022.3176978

Cited by 20 publications

(7 citation statements)

References 46 publications

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“…In recent years, China has made signi cant strides in aerosol detection by launching on-board sensors, which has effectively bridged the gap left by the discontinued POLDER series of sensors (Shi et al 2023;Ge et al 2022;Li et al 2018Li et al , 2022dLi et al , 2022c. The development holds immense importance for the global scienti c community.…”

Section: Songacheva Et Al(mentioning

confidence: 99%

Aerosol Optical Depth Retrieval on Particulate Observing Scanning Polarimeter (POSP) Data over Land using a new Look-up table (LUT) Search Method

Ji,

Li,

Zhang

et al. 2024

Preprint

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Accurate estimation of Land Surface Reflectance (LSR) is the key to Aerosol Optical Depth (AOD) retrievals. However, it is noted that the band-specific LSRs retrieved using Look-Up Tables (LUTs) are typically pseudo-LSRs obtained by atmospheric corrections to the AOD predetermined in the LUTs that do not match the surface constraints established by the true LSRs alone. As a result, there is an uncertain error in modeling reflectance at the top of atmosphere (TOA) using pseudo-LSRs calculated by linear interpolation. This study proposed a new LUT search method to improve the AOD retrievals of the Particle Observing Scanning Polarimetry (POSP) sensor onboard the China GaoFen-5 (02) satellite. LSR atmospherically corrected using ERA5 reanalysis data and POSP AOD products for the year 2022 was adopted to create a new full-spectrum LSR self-consistent surface constraint. Results showed that the AOD of POSP in January 2023 retrieved using the new method agrees with the ground-truth AOD values from AErosol RObotic NETwork (AERONET) site observations with the correlation coefficient (R) at 0.703 and the root mean square error (RMSE) at 0.068. 76.77% of the values fell into the expected error (EE) envelope of range ± (0.05 + 0.15 AODAERONET), and 67.35% met the accuracy requirements of the Global Climate Observing System (GCOS).

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Section: Songacheva Et Al(mentioning

confidence: 99%

Aerosol Optical Depth Retrieval on Particulate Observing Scanning Polarimeter (POSP) Data over Land using a new Look-up table (LUT) Search Method

Ji,

Li,

Zhang

et al. 2024

Preprint

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“…In the application of aerospace remote sensing and deep aerospace exploration, a part of satellite platforms carried polarization detection payloads [ 7 , 8 , 9 , 10 , 11 , 12 ]. The polarimeters of these payloads are mainly divided into the division of time (DoT) [ 7 , 8 ], the division of amplitude (DoAP) [ 9 , 10 ], and the division of focal plane (DoFP) [ 11 , 12 ] polarization detection. Among them, DoT and DoAP polarimeters are the most mature and widely used.…”

Section: Introductionmentioning

confidence: 99%

Method of Directly Writing MPA on Photosensitive Surface of Detector Based on FIB

Nie,

Qiu,

Sun

et al. 2024

Sensors

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The division of focal plane (DoFP) polarization detector has great potential for the development of aerospace polarimeters, but the existing commercial DoFP polarization detector cannot satisfy all the missions due to the diversity of satellite payloads. Here, we propose a method of directly writing a micro-polarizer array (MPA) on the detector surface based on focused ion beams (FIB) and fabricating a push-broom scanning DoFP polarization detector. The feasibility and low crosstalk of the solution were proved through testing, and the reasons for the low extinction ratio caused by oxidation were explained through characterization and numerical calculations. This scheme is not only applicable to DoFP polarization detectors but also provides ideas for the integration of other metasurface structures and detectors.

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“…In this study, the observation data of the 865 nm band of the POSP are used for the radiometric calibration of the 865 nm band of the DPC. It has been proven that the TOA reflectance for the bands at 865 and 910 nm are strongly correlated without considering the effects of the WVA [11]. In this work, the relationship between them is used to calibrate the 910 nm band of the DPC.…”

Section: Introductionmentioning

confidence: 99%

Radiometric Calibration of the Near-Infrared Bands of GF-5-02/DPC for Water Vapor Retrieval

Xie,

Zhu,

Zhu

et al. 2024

Remote Sensing

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The GaoFen (GF)-5-02 satellite is one of the new generations of hyperspectral observation satellites launched by China in 2021. The directional polarimetric camera (DPC) is an optical sensor onboard the GF-5-02 satellite. The precipitable water vapor (PWV) is a key detection parameter of DPC. However, the existing PWV data developed using DPC data have significant errors due to the lack of the timely calibration of the two bands (865, 910 nm) of DPC used for PWV retrieval. In order to acquire DPC PWV data with smaller errors, a calibration method is developed for these two bands. The method consists of two parts: (1) calibrate the 865 nm band of the DPC using the cross-calibration method, (2) calibrate the 910 nm band of the DPC according to the calibrated 865 nm band of the DPC. This method effectively addresses the issue of the absence of a calibration method for the water vapor absorption band (910 nm) of the DPC. Regardless of whether AERONET PWV data or SuomiNET PWV data are used as the reference data, the accuracy of the DPC PWV data developed using calibrated DPC data is significantly superior to that of the DPC PWV data retrieved using data before recalibration. This means that the calibration method for the NIR bands of the DPC can effectively enhance the quality of DPC PWV data.

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In-Orbit Test of the Polarized Scanning Atmospheric Corrector (PSAC) Onboard Chinese Environmental Protection and Disaster Monitoring Satellite Constellation HJ-2 A/B

Cited by 20 publications

References 46 publications

Aerosol Optical Depth Retrieval on Particulate Observing Scanning Polarimeter (POSP) Data over Land using a new Look-up table (LUT) Search Method

Aerosol Optical Depth Retrieval on Particulate Observing Scanning Polarimeter (POSP) Data over Land using a new Look-up table (LUT) Search Method

Method of Directly Writing MPA on Photosensitive Surface of Detector Based on FIB

Radiometric Calibration of the Near-Infrared Bands of GF-5-02/DPC for Water Vapor Retrieval

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