The autocorrelation function of the output signal given the input signal is derived in closed form for dispersion-free fiber channels with distributed optical amplification (OA). The autocorrelation function is used to upper bound the output power of bandlimited or time-resolution limited receivers, and thereby to bound spectral broadening and the capacity of receivers with thermal noise. The o...

An independent assessment of the Advanced Reusable Transportation System (ARTS) has been conducted. The ARTS concept is an all-rocket, fully reusable launch vehicle utilizing electromagnetic launch assist. ARTS is fitted with a dual-fuel main propulsion system utilizing flight proven Space Shuttle Main Engines and RD-180s. Nominally, the vehicle is intended to operate without a crew using auton...

Simulation research on the launch process of a ship-borne multiple launch rocket system is studied in this paper. First, the power spectrum density of the ship’s motion is calculated based on ocean wave energy spectrum, and the movement spectrums of the ship’s random motion are calculated. Then, the model of shipborne rocket launcher system is built by virtual prototype technology. The launch p...

It is generally assumed by the community that reusable launch vehicles will dramatically reduce launch costs because you don’t “throw away the vehicle” every time it is used. However, this is usually taken as an element of faith, without any substantive analysis to support the conclusion. The example of the Space Shuttle, originally sold to Congress on the basis of dramatically cutting launch c...

The Visible Infrared Imaging Radiometer Suite (VIIRS) on-board the first Joint Polar Satellite System (JPSS) completed its sensor level testing on December 2014. The JPSS-1 (J1) mission is scheduled to launch in December 2016, and will be very similar to the Suomi-National Polar-orbiting Partnership (SNPP) mission. VIIRS instrument has 22 spectral bands covering the spectrum between 0.4 and 12....

Information and communication technologies (ICT) play significant role in modern smart grids (SG). SG functionalities require implementation of devices with computing performance into the grids and communication network between these devices. This has also been the case in a low-voltage direct current (LVDC) electricity distribution system, to which remote and automated grid monitoring and cont...