Spaceborne Relative Radiometer: Instrument Design and Pre-Flight Test

In order to simultaneously determine the values of total solar irradiance (TSI) and the Earth’s radiation at the top of the atmosphere (TOA) on board the Fengyun-3F satellite, a spaceborne relative radiometer (SRR) was developed. It adopts a dual-channel structure, including a solar radiometer chann...

Full description

Saved in:
Bibliographic Details
Published in:Remote sensing (Basel, Switzerland) Switzerland), 2023-06, Vol.15 (12), p.3085
Main Authors: Wu, Duo, Fang, Wei, Wang, Kai, Ye, Xin, Jia, Ruidong, Yang, Dongjun, Song, Baoqi, Luo, Zhitao, Wang, Yuwei, Xia, Zhiwei, Zhu, Ping, Ruymbeke, Michel van
Format: Article
Language:English
Subjects:
Aerospace environments
Background noise
Calibration
Climate change
Design
Diameters
Earth radiation budget
Flight tests
Ground tests
Heat conductivity
Irradiance
measurement model
on-orbit calibration
Radiation
Radiometers
relative radiometer
Remote sensing
Satellites
Sensors
Sun
Visual field
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In order to simultaneously determine the values of total solar irradiance (TSI) and the Earth’s radiation at the top of the atmosphere (TOA) on board the Fengyun-3F satellite, a spaceborne relative radiometer (SRR) was developed. It adopts a dual-channel structure, including a solar radiometer channel (SR) with an unobstructed field of view (FOV) of 1.5° and an Earth radiometer channel (ER) with a wide field of view (WFOV) of 95.3° and a diameter of about 1900 km on the ground. Before the launch, both the SR and ER were calibrated. The SR, installed on the inner frame of the solar tracker of the SIM-II (solar irradiance monitor-II), is used to observe rapid changes in solar radiance with the SIAR (solar irradiance absolute radiometer), an electrical-substitution radiometer, on orbit. The ER is mounted on the U-shaped frame of the solar tracker, directly pointing in the nadir direction. Additionally, a dark space observation mode is used to determine the on-orbit background noise and lunar observation mode for on-orbit calibration. In this article, the instrument design and working principle of the SRR is first introduced, and an analysis of the measurement model of the ER, the WFOV channel of the SRR, is focused on. Finally, ground test results of the SRR are introduced.
ISSN:2072-4292
2072-4292
DOI:10.3390/rs15123085