Results 51 to 60 of about 533,452 (194)

Spatial and temporal characterization of SCIAMACHY limb pointing errors during the first three years of the mission [PDF]

Atmospheric Chemistry and Physics, 2005
Limb scattering retrievals of atmospheric minor constituent profiles require highly accurate knowledge of the tangent heights during the measurements.
C. von Savigny, J. W. Kaiser, H. Bovensmann, J. P. Burrows, I. S. McDermid, T. Leblanc   +5 more
doaj  

Overview of Akatsuki data products: definition of data levels, method and accuracy of geometric correction

Earth, Planets and Space, 2017
We provide an overview of data products from observations by the Japanese Venus Climate Orbiter, Akatsuki, and describe the definition and content of each data-processing level.
Kazunori Ogohara, Masahiro Takagi, Shin-ya Murakami, Takeshi Horinouchi, Manabu Yamada, Toru Kouyama, George L. Hashimoto, Takeshi Imamura, Yukio Yamamoto, Hiroki Kashimura, Naru Hirata, Naoki Sato, Atsushi Yamazaki, Takehiko Satoh, Naomoto Iwagami, Makoto Taguchi, Shigeto Watanabe, Takao M. Sato, Shoko Ohtsuki, Tetsuya Fukuhara, Masahiko Futaguchi, Takeshi Sakanoi, Shingo Kameda, Ko-ichiro Sugiyama, Hiroki Ando, Yeon Joo Lee, Masato Nakamura, Makoto Suzuki, Chikako Hirose, Nobuaki Ishii, Takumi Abe   +30 more
doaj   +1 more source

Performance analysis of coherent FSO system with SSC receiver [PDF]

Serbian Journal of Electrical Engineering, 2016
This paper analyzes the performance of coherent free-space optical (FSO) system employing the switch-and-stay (SSC) dual diversity receiver. The intensity fluctuations of the optical signal are modeled by Gamma-Gamma distribution, being caused ...
Petković Milica I., Đorđević Goran T.   +1 more
doaj   +1 more source

Performance Analysis of IRS-Assisted Multi-Link FSO System Under Pointing Errors

IEEE Photonics Journal
The integration of intelligent reflecting surfaces (IRS) into free-space optical (FSO) communication systems is considered as a promising and innovative approach to overcoming existing challenges due to the strict line-of-sight (LoS) requirements faced ...
Takumi Ishida, Chedlia Ben Naila, Hiraku Okada, Masaaki Katayama   +3 more
doaj   +1 more source

Designing an Adaptive Web Navigation Interface for Users with Variable Pointing Performance [PDF]

, 2018
Many online services and products require users to point and interact with user interface elements. For individuals who experience variable pointing ability due to physical impairments, environmental issues or age, using an input device (e.g., a computer
Ali, Abdullah, Bhalerao, Tejas, Hamidi, Foad, Hornback, Catherine, Hurst, Amy, Martin-Hammond, Aqueasha, Means, Casey, Ortega, Christian   +7 more
core   +2 more sources

Performance of Spatially Coupled LDPC Codes Over the Underwater Wireless Optical Channel With Strong Turbulence and Pointing Errors

IEEE Access
The major problems in an underwater wireless optical communication (UWOC) link are turbulence induced fading and pointing errors. In this paper, we have investigated the bit error rate (BER) performance of spatially coupled low-density parity-check (SC ...
Sravan Kumar Padala, John D'souza
doaj   +1 more source

Error budget analysis of SCIAMACHY limb ozone profile retrievals using the SCIATRAN model [PDF]

Atmospheric Measurement Techniques, 2013
A comprehensive error characterization of SCIAMACHY (Scanning Imaging Absorption Spectrometer for Atmospheric CHartographY) limb ozone profiles has been established based upon SCIATRAN transfer model simulations.
N. Rahpoe, C. von Savigny, M. Weber, A.V. Rozanov, H. Bovensmann, J. P. Burrows   +5 more
doaj   +1 more source

Autonomous pointing control of a large satellite antenna subject to parametric uncertainty [PDF]

, 2017
With the development of satellite mobile communications, large antennas are now widely used. The precise pointing of the antenna’s optical axis is essential for many space missions.
Liu, Yufei, Radice, Gianmarco, Tan, Shujun, Wu, Shunan   +3 more
core   +2 more sources

Ergodic Capacity Analysis of Decode-and-Forward Relay-Assisted FSO Systems Over Alpha–Mu Fading Channels Considering Pointing Errors

IEEE Photonics Journal, 2016
The ergodic capacity of decode-and-forward (DF) relay-assisted free-space optical (FSO) communication systems when line of sight is available is analyzed over gamma–gamma fading channels with pointing errors.
Ruben Boluda-Ruiz, Antonio Garcia-Zambrana, Beatriz Castillo-Vazquez, Carmen Castillo-Vazquez   +3 more
doaj   +1 more source

Coronagraphic Low Order Wavefront Sensor: Principle and Application to a Phase-Induced Amplitude Coronagraph [PDF]

, 2009
High contrast coronagraphic imaging of the immediate surrounding of stars requires exquisite control of low-order wavefront aberrations, such as tip-tilt (pointing) and focus.
Belikov, Digby, Guyon, Guyon, Kuchner, Kuchner, Lloyd, Olivier Guyon, Palacios, Roger Angel, Shaklan, Sivaramakrishnan, Taro Matsuo   +12 more
core   +1 more source