Topographic mapping of the earth, moon and planets can be accomplished with high resolution and accuracy using satellite laser altimeters. These systems employ nanosecond laser pulses and microradian beam divergences to achieve submeter vertical range resolution from orbital altitudes of several hundred kilometers. In this paper we develop detailed expressions for the range and pulse width meas...

In The industry has always focused to devise engineering methodologies for establishment and modification of relatively easier methods for any exhaustive process. A number of different technologies have been developed suitable for the detection of the motion or presence of a target at shorter or longer distances. Most of them make use of a small portion of the electromagnetic spectrum, usually ...

At present, optical coherence tomography systems have a limited imaging depth or axial scan range, making diagnosis of large diameter arterial vessels and hollow organs difficult. Adaptive ranging is a feedback technique where image data is utilized to adjust the coherence gate offset and range. In this paper, we demonstrate an adaptive optical coherence tomography system with a 7.0 mm range. B...

We present the scientiic motivations and the rst results obtained with an alternative method for the analysis of laser ranging data for the determination of the coordinates of ground stations and their temporal variations. The method makes use of very short orbital arcs (lasting less than two hours for LAGEOS) observed almost simultaneously by at least three stations and is particularly address...

The ultimate goal of the satellite laser ranging is the millimeter precision and accuracy. To achieve this goal, all the individual contributors to the ranging error budget must be well below millimeter level. The best existing ground based ranging systems are capable to achieve millimeter ranging precision when ranging to short distance terrestrial targets. However, ranging to Earth orbiting s...

Excimer laser ablation has been proposed as a technique for keratorefractive surgery. Clinical acceptance of linear-incision laser keratectomy may depend on the availability of a method for accurately and noninvasively monitoring incision depth during the ablation process. We have developed a femto-second optical ranging technique for measurement of corneal incision depth. This technique uses n...

In this paper, we propose a short ranging middleware built on WUSB (Wireless USB) over WBAN (Wireless Body Area Networks) hierarchical protocol for body sensor networks. The proposed middleware platform is composed of time-synchronization and optimal short ranging solution. The optimal ranging solution is proposed through comparison of experiment results from ToA (Time of Arrival), TDoA (Time D...

More than storing a huge volume of data in Datacenters, protecting them from threats is a major concern in our heterogeneous networks. From local host to cloud, finding a space to store data was the issue in the earlier whereas retrieving by the right person is the issue in the later. But in both the scenarios, protecting the data from illegal use and unethical access is dispute. Access to a se...