For more than three decades now, satellite passive microwave observations have been used to monitor polar sea ice. Here we utilize sea ice extent trends determined from primarily satellite data for both the Northern and Southern Hemispheres for the period 1972(73)-2004 and compare them with results from simulations by eleven climate models. In the Northern Hemisphere, observations show a statis...

In our previous work[18], it was proved that the performance of bic-tcp was good under satellite network, and a new adaptive window increment based bic-tcp algorithm (bic_AWI) was proposed to show an improved data transfer in satellite network. We, implemented the idea on ns2’s implementation of bic tcp. Proposed modifications has been made on bic-tcp, and improvement in performance has been re...

satellite thermal control ensures safe operating temperature ranges for satellite components throughout the mission life. effects of altitude, spin, and position of satellite radiator(s) on the thermal control of a small low earth orbit (leo) satellite have been studied. results show that change in satellite altitude, in the range considered here, does not produce critical thermal conditions. h...

The dynamic stability of the Antarctic Ice Sheet is one largest uncertainties in projections future global sea-level rise. Essential for improving ice sheet evolution understanding ongoing trends and accelerations mass loss context dynamics. Here, we examine change from 2002 to 2020 using data GRACE (Gravity Recovery Climate Experiment; 2002–2017) its follow-on GRACE-FO (2018-present) satellite...

Although HDR content processing, coding and quality assessment have been largely addressed in the last few years, little to no work has been concentrating on how to assess quality in HDR for 360◦ or omnidirectional content. This paper is an attempt to answer to various questions in this direction. As a minimum, a new data set for 360◦ HDR content is proposed and a new methodology is designed to...

Human observers are able to make fine discriminations of surface gloss. What cues are they using to perform this task? In previous studies, we identified two reflection-related cues—the contrast of the reflected image (c, contrast gloss) and the sharpness of reflected image (d, distinctness-of-image gloss)--but these were for objects rendered in standard dynamic range (SDR) images with compress...

Terahertz radiation (THz)-based electron acceleration has the potential as a technology for driving next-generation, compact ultrafast and ultrabright x-ray sources. Dephasing is one of key problems that prevent long THz–electron interaction lengths in sub- to few-MeV range, where velocities vary significantly during high-field acceleration. Here, we present phase-shifter design with double vac...