the research used the satellite image (landsat 7 etm ) within the thermal infrared sixth band (tir6) and geographic information system (gis) to determine the air pollution and its relationship with the land cover (lc) and land use (lu) of baghdad city. concentration of total suspended particles (tsp), lead (pb), carbon oxides (co, co2), and sulphur dioxide (so2) were obtained from 22 ground mea...

Using satellite radar interferometry observations of Greenland, we detected widespread glacier acceleration below 66 degrees north between 1996 and 2000, which rapidly expanded to 70 degrees north in 2005. Accelerated ice discharge in the west and particularly in the east doubled the ice sheet mass deficit in the last decade from 90 to 220 cubic kilometers per year. As more glaciers accelerate ...

Several system alternatives are being considered for provision of mobile and personal satellite services in the near future. Many proposals adopt nongeostationary satellite constellations, thus the channel characteristics are not stationary. Furthermore, multiple access techniques under consideration range from narrowband to wideband (e.g. CDMA) solutions. Finally, due to the requirement of bei...

For the new European satellite navigation system Galileo many new applications are envisaged using the enhanced features with the reliability and accuracy of the system. Most applications focus on the transport area where new approaches are dealing with increased traffic and road safety using Advanced Driver Assistance Systems (ADAS). The paper shows how this can be realised by means of procedu...

Abstract This paper focuses on the dedicated accelerometers developed for MICROSCOPE mission taking into account specific range of acceleration to be measured board satellite. Considering one micro-g and even less as full instrument with an objective femto-g resolution, that leads a customized concept high-performance electronics sensing servo-actuations accelerometer test-masses. performance d...

In this paper we present a holistic approach to CPU based acceleration of the high dynamic range imaging (HDRI) pipeline. The high dynamic range representation can encode images regardless of the technology used to create and display them, with the accuracy that is only constrained by the limitations of the human eye and not a particular output medium. Unfortunately, the increase in accuracy ca...

AIM The aim of the present study was to evaluate reactive hops under systematically modified acceleration conditions. It was hypothesized that a high preactivity of the leg extensors and phase-specific adjustments of the leg muscle activation would compensate the alterations caused by the various acceleration levels in order to maintain a high leg stiffness, thus enabling the jumper to perform ...

The need to accurately predict satellite positions is a leading aspect of space situational awareness and presents increased challenges in the specification of the spacecraft environment in low earth orbit. Atmospheric drag is the most important environmental perturbation for low orbiting spacecraft and the most difficult one to model and predict precisely. The author will present a method for ...

Drag-free control is one of the key technologies for verification Taiji-1 satellite. In direction sensitive axis, drag-free controller receives measurement signal from high-precision gravitational reference sensor on satellite, and instructs micro-thruster system to counteract disturbance force acting so that microgravity level in sensing axis satellite can reach order 10[Formula: see text] m/s...