Results 51 to 60 of about 27,633 (255)

Understanding ‘saturation’ of radar signals over forests

Scientific Reports, 2017
There is an urgent need to quantify anthropogenic influence on forest carbon stocks. Using satellite-based radar imagery for such purposes has been challenged by the apparent loss of signal sensitivity to changes in forest aboveground volume (AGV) above ...
Neha Joshi, Edward T. A. Mitchard, Matthew Brolly, Johannes Schumacher, Alfredo Fernández-Landa, Vivian Kvist Johannsen, Miguel Marchamalo, Rasmus Fensholt   +7 more
doaj   +1 more source

On the collocation between dayside auroral activity and coherent HF radar backscatter [PDF]

Annales Geophysicae, 2000
The 2D morphology of coherent HF radar and optical cusp aurora has been studied for conditions of predominantly southward IMF conditions, which favours low-latitude boundary layer reconnection.
J. Moen, J. Moen, H. C. Carlson, S. E. Milan, N. Shumilov, B. Lybekk, P. E. Sandholt, M. Lester   +7 more
doaj   +1 more source

Transmission Raman Spectroscopy (TRS) for Accurate Authentication of API in Coated Hydroxychloroquine (HCQ) Tablets

Journal of Raman Spectroscopy, EarlyView.
We report the development and use of a transmission Raman spectroscopy (TRS) system for a more accurate but nonintrusive way of authentication of API in coated HCQ tablets which otherwise is not possible using the backscattered (BS) configuration of Raman spectroscopy. The coating interference is found to be almost zero in case of the TRS and a greater
Vijay Kumar, Khan Mohammad Khan, Hemant Krishna, Khageswar Sahu, Srinibas Satapathy, Shovan Kumar Majumder   +5 more
wiley   +1 more source

Sensitivity of Sentinel-1 Backscatter to Management-Related Disturbances in Temperate Forests

Remote Sensing
The rapid and accurate detection of forest disturbances in temperate forests has become increasingly crucial as policy demands and climate pressure on these forests rise.
Sietse van der Woude, Johannes Reiche, Frank Sterck, Gert-Jan Nabuurs, Marleen Vos, Martin Herold   +5 more
doaj   +1 more source

Cloud boundary height measurements using lidar and radar

, 2003
Using only lidar or radar an accurate cloud boundary height estimate is often not possible. The combination of lidar and radar can give a reliable cloud boundary estimate in a much broader range of cases.
Andre van Lammeren, Apituley, Arnoud Apituley, Boers, Danne, Erkelens, Frisch, Hermann Russchenberg, KNMI, Lammeren, Leo Ligthart, Rogers, Sassen, Sassen, Sassen, Thomas, Venema, Venema, Victor Venema, Weitkamp   +19 more
core   +1 more source

Excellent Microwave Absorption of Polyurethane Nanocomposites Engineered With Graphene Nanoplatelets and Magnetite

Journal of Polymer Science, EarlyView.
Reflection loss behavior and microwave absorption mechanism of graphene nanoplatelet and magnetite reinforced polyurethane nanocomposites, highlighting synergistic dielectric and magnetic losses. ABSTRACT The escalating growth in telecommunication technology has led to a surge in electromagnetic pollution due to the increase in electronic devices. This
Michal Urbánek, Vanamoorthy Mariappan, Milan Masař, Jakub Ševčík, Michal Machovský, Jarmila Vilčáková, Ivo Kuřitka, Raghvendra Singh Yadav   +7 more
wiley   +1 more source

First observations of SPEAR-induced artificial backscatter from CUTLASS and the EISCAT Svalbard radars [PDF]

Annales Geophysicae, 2006
Results are presented from the first two active experimental campaigns undertaken by the new SPEAR (Space Plasma Exploration by Active Radar) high-power system that has recently become operational on Spitzbergen, in the Svalbard archipelago.
T. R. Robinson, T. K. Yeoman, R. S. Dhillon, M. Lester, E. C. Thomas, J. D. Thornhill, D. M. Wright, A. P. van Eyken, I. W. McCrea   +8 more
doaj   +1 more source

A review of the FATIMA Yellow Sea field campaign research

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The FATIMA marine fog project took place over the Sable Island region of eastern Canada (summer 2022) and the Yellow Sea of the Republic of Korea (ROK, summer 2023). Its goals are to improve marine fog monitoring and forecasting. Instrumented multiple research vessels, aircraft, tethered balloon and autonomous systems, ocean observation sites, and ...
Seok Lee, Ismail Gultepe, H. J. S. Fernando, Saša Gaberšek, Luc Lenain, Qing Wang, Edward D. Creegan, Eric Pardyjak, Clive Dorman, Lossif Lozovatsky, David G. Ortiz‐Suslow, Jesus Ruiz‐Plancarte, Ryan Yamaguchi, Eren Gultepe, S. Hoch, A. Perelet, D. Singh, Joo Wan Cha, Lian Shen, Anup Vaman Barve, Anne Dowling, Sen Wang, Gianina Giacosa, Laurent Grare, Peter Taylor, Zheqi Chen, Rachel Y.‐W. Chang, Piyush Teeloku, Nicholas Gapp, Seung‐Woo Lee, Jong‐Min Jeong, Hojin Kim, Jin‐Yong Jeong, Ki‐Young Heo, Minsang Kim, Myung‐Sook Park, Kyung‐Hee Oh, Joon‐Seong Park, Dong‐Chull Jeon, Kyu‐Min Song, Jae‐Yeob Kim, Dawoon Jung, Kyung‐Il Chang, Jae Hak Lee, Kyung Man Kim, Daehun Yu, Seong Soo Yum, Andrew J. Heymsfield, Martin Agelin‐Chaab, Tae‐Young Goo, Dong‐Gyun Ryu   +50 more
wiley   +1 more source

Analysis of Onboard Verification Flight Test for the Salinity Satellite Scatterometer

Sensors, 2023
The upcoming Salinity Satellite, scheduled for launch in 2024, will feature the world’s first phased array radar scatterometer. To validate its capability in measuring ocean surface backscatter coefficients, this paper conducts an in-depth analysis of ...
Yongqing Liu, Te Wang, Risheng Yun, Peng Liu, Wenming Lin, Di Zhu, Hao Liu, Xiangkun Zhang   +7 more
doaj   +1 more source

Exploiting Aeolus winds in a regional numerical weather prediction model

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Aeolus measured winds have proven to be beneficial for global models. However, demonstrating positive impact for limited‐area models has been a challenge so far. For the first time, we have demonstrated a statistically significant positive impact of Aeolus winds in a limited‐area model by using the 4DVar data assimilation technique and the most recent ...
Gert‐Jan Marseille, Roohollah Azad, Martin Ridal, Susanna Hagelin   +3 more
wiley   +1 more source