Results 51 to 60 of about 108,259,639 (144)

Signal-to-Noise Ration Evaluation of Luojia 1-01 Satellite Nighttime Light Remote Sensing Camera Based on Time Sequence Images [PDF]

, 2019
Signal-to-noise ratio (SNR) is an important index to evaluate radiation performance and image quality of optical imaging systems under low illumination background. Under the nighttime lighting condition, the illumination of remote sensing objects is low and varies greatly, usually ranging from several lux to tens of thousands of lux.
Wei Wang, Xing Zhong, Zhiqiang Su, Deren Li, Guo Zhang   +4 more
openaire   +1 more source

Luojia-1 Nightlight Image Registration Based on Sparse Lights

, 2022
When mosaicking adjacent nightlight images of a large area that lacks human activities, traditional registration methods have difficulty realizing the tie point registrations due to the lack of structural information. In order to address this issue, this
Xin Shen, Zhichao Guan, Guo Zhang, Yonghua Jiang, Zhen Li   +4 more
core   +1 more source

Augmented LT codes over binary extension fields with increased ratio of full‐degree columns

Electronics Letters, Volume 60, Issue 5, March 2024.
An augmented scheme of LT codes is proposed to improve the decoding success rate. The method involves substituting the 1 in full‐degree columns of the generator matrix of conventional LT codes with binary extension field elements and simultaneously increasing the ratio of full‐degree columns in the ideal soliton distribution, which allows for higher ...
Changyue Jiang, Jingsong Cui, Jiawei Li, Chi Guo   +3 more
wiley   +1 more source

Impacts of Local Green's Functions on Modeling Atmospheric Loading Effects for GNSS Reference Stations

Earth and Space Science, Volume 11, Issue 2, February 2024.
Abstract The Green's function approach is well‐established and widely used for modeling the surface mass loading displacements. Global mean Green's functions (MGFs) are commonly applied without considering local variations of the crustal structure. Derived from the modified layered Earth structure, the local Green's functions (LGFs) are theoretically ...
Wenlan Fan, Weiping Jiang, Zhao Li, Jun Tao, Ze Wang, Linyu He   +5 more
wiley   +1 more source

WHU‐GRACE‐GPD01s: A Series of Constrained Monthly Gravity Field Solutions Derived From GRACE‐Based Geopotential Differences

, 2023
202404 bcchVersion of RecordOthersNational Natu-ral Science Foundation of China; Special Fund of Hubei Luojia ...
Chen, J, Xianpao Li, Bo Zhong, Li, X, Qiong Li, Zhong, B, Jianli Chen, Li, Q   +7 more
core   +1 more source

NTL and POI Data

, 2020
The uploaded data includes the Yunnan Province POI data used in the paper and Luojia No.
XiongHe
core   +1 more source

Accuracy comparison between Yangwang-1 images and VIIRS, Luojia-1 images.

Accuracy comparison between Yangwang-1 images and VIIRS, Luojia-1 images.
Xiaoyu Long (9366548), Luyao Wang (3958562), Jun Hao (721300), Anfeng Zhu (17817144), Xu Gang (17817147), Hao Zhang (15339)   +5 more
core   +1 more source

Identifying urban sprawl by night lights: a pending issue

, 2020
Nighttime light imagery of the earth are a useful way to study the urbanization process. Satellite nocturnal images have been used to identify metropolitan areas as well as urban growth.
Roca Cladera, Josep, Arellano Ramos, Blanca   +1 more
core   +1 more source

Luojia 3-01 Satellite—Real-Time Intelligent Service System for Remote Sensing Science Experiment Satellite

Luojia 3-01 is the world's first intelligent remote sensing satellite, equipped with various imaging modes including video, frame-pushing, and scan-pushing.
Jing Xiao, Fang Yang, Deren Li, Mi Wang, Qianyu Wu   +4 more
core   +1 more source

Evaluation of Urban Nighttime Light Environment Safety Using Integrated Remote Sensing and Perception Modeling

Remote Sensing
A well-designed nighttime lighting environment not only enhances pedestrian comfort and urban vitality but also serves as a crucial factor in creating safe and livable urban spaces.
Ming Liu, Han Zhang, Ruicong Li, Chenxu Wang, Jiamin Li, Feipeng Jiao   +5 more
doaj   +1 more source