Zobrazeno 1 - 10
of 8 428
pro vyhledávání: '"L-band"'
Publikováno v:
天地一体化信息网络, Vol 5, Pp 53-62 (2024)
At present, the frequency of non-geostationary orbit(NGSO) mobile satellite service is becoming more and more tense.Aimed at the complicated problem of frequency coordination of mobile direct connection to NGSO satellite service, firstly, an analysis
Externí odkaz:
https://doaj.org/article/00b0da5b4bef4d859f086626767aafc5
Publikováno v:
Journal of Telecommunications and Information Technology, Vol 4, Iss 4 (2024)
This article describes the design of an all-metal combline coaxial cavity diplexer. The device is based on a Y-shaped star-resonant junction which allows to achieve a compact design by positioning the two channels in an in-line and side-by-side arran
Externí odkaz:
https://doaj.org/article/24bf271a0c44449abe20c8849059b1c3
Publikováno v:
Xibei Gongye Daxue Xuebao, Vol 42, Iss 2, Pp 362-367 (2024)
The L-band digital aeronautical communication system (LDACS) is one of the essential infrastructures for future aviation broadband communication. To address the problem of interference from adjacent high-power distance measuring equipment (DME) signa
Externí odkaz:
https://doaj.org/article/8e780e6b55a34371923924481158c573
Autor:
Juliette Ortet, Arnaud Mialon, Yann Kerr, Alain Royer, Aaron Berg, Julia Boike, Elyn Humphreys, François Gibon, Philippe Richaume, Simone Bircher-Adrot, Azza Gorrab, Alexandre Roy
Publikováno v:
International Journal of Digital Earth, Vol 17, Iss 1 (2024)
Soil Moisture (SM) is a key parameter in northern Arctic and sub-Arctic (A-SA) environments that are highly vulnerable to climate change. We evaluated six SM satellite passive microwave datasets using thirteen ground-based SM stations across Northwes
Externí odkaz:
https://doaj.org/article/1a781428875d42b590b6905329d9c0fb
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 16592-16607 (2024)
In the soil moisture active passive (SMAP) mission's soil moisture retrieval algorithms, the effects of surface roughness and vegetation scattering on the brightness temperature are conventionally modeled using time-invariant parameters: roughness in
Externí odkaz:
https://doaj.org/article/e96c7973370d434baf590e677f412c9c
Autor:
Foad Brakhasi, Jeffrey P. Walker, Jasmeet Judge, Pang-Wei Liu, Xiaoji Shen, Nan Ye, Xiaoling Wu, In-Young Yeo, Nithyapriya Boopathi, Edward Kim, Yann H. Kerr, Thomas J. Jackson
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 2570-2585 (2024)
P-band radiometry has been demonstrated to have a deeper sensing depth than L-band, making the consideration of multilayer microwave interactions necessary. In addition, the scattering and phase interference effects are different at the P-band, requi
Externí odkaz:
https://doaj.org/article/6b1f385ce8754afe8fd441c92543dba0
Autor:
Xuchen Jin, Xianqiang He, Palanisamy Shanmugam, Jianyun Ying, Fang Gong, Qiankun Zhu, Delu Pan
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 10291-10305 (2024)
A new forward model (FM) was developed to characterize the influence of precipitation on L-band passive ocean surface measurements. The FM, which relates rain-induced brightness temperature (TB) variations to the rain rate and wind speed (WS), was es
Externí odkaz:
https://doaj.org/article/ea07e64f8ade4fb6a5806f0b0f02e0e7
Autor:
Md Mehedi Farhad, Ahmed Manavi Alam, Sabyasachi Biswas, Mohammad Abdus Shahid Rafi, Ali C. Gurbuz, Mehmet Kurum
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 9389-9402 (2024)
Passive microwave remote sensing is a vital tool for acquiring valuable information regarding the Earth's surface, with significant applications in agriculture, water management, forestry, and various environmental disciplines. Precision agricultural
Externí odkaz:
https://doaj.org/article/e6141d1ee0944eec9154cf80812a9ece
Autor:
Kyung Y. Kim, Ziyue Zhu, Runze Zhang, Bin Fang, Michael H. Cosh, Andrew L. Russ, Eryan Dai, Jack Elston, Maciej Stachura, Albin J. Gasiewski, Venkataraman Lakshmi
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 7684-7694 (2024)
Although satellite-based soil moisture products are useful at regional and global scales, they do not meet the needs of users who require high-resolution information for applications such as precision agriculture or catchment hydrologic modeling. The
Externí odkaz:
https://doaj.org/article/f55ab0c1a109471790f1c88de7da6712
Autor:
David M. Le Vine, Ming Li, Yiwen Zhou, Roger H. Lang, Emmanuel P. Dinnat, Yan Soldo, Paolo de Matthaeis
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 5911-5919 (2024)
The range of salinity and temperature measurements used to develop models for the dielectric constant of sea water have in the past been limited to values appropriate for the open ocean. But there are important water bodies, such as the Great Salt La
Externí odkaz:
https://doaj.org/article/c4248c1539694b91b4d6ad9f8b0db195