Author:
Xue Yangyang,Li Cunxia,Hui Ningju,Liu Lina,Tong Junyi,Zhang Rong,Tang Yuanhe
Abstract
In view of the special properties of the upper atmosphere at the altitude of
80–120 km, a ground-based passive remote sensing instrument
ground-based airglow volume emission rate and temperature imaging
interferometer (GBAVTII) is built to detect the atmospheric
temperature used
O
2
(
0
-
1
)
spectral line of night airglow at the
altitude of 94 km. In the process of photographing the upper
atmosphere airglow with the GBAVTII, the stray light (white noise)
such as moonlight, city lights, and starlight will be affected. In
this paper, the theoretical expression of denoising is derived based
on the rotational line temperature measurement of diatomic
O
2
(
0
-
1
)
airglow. Through a slight adjustment
of different parameters in the forward equation of the GBAVTII and
noise reduction in laboratory flat-field fine calibration, and other
denoising methods in the GBAVTII image processing process, the maximum
accuracy of the GBAVTII detection of the upper atmospheric temperature
is enhanced to 2.4 K. Also, the minimum error of the GBAVTII
detecting data with the satellite instrument sounding of atmosphere
using broadband emission radiometry is 0.4 K. Thus, the
absolute accuracy of the GBAVTII in detecting the upper atmospheric
temperature can be improved to
±
(
0.4
−
2.4
)
K
through the theory and method studied
in this paper.
Funder
National Natural Science Foundation of China
Natural Science Basic Research Program of Shaanxi
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering