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We present a new approach for the real-time control and operation of media-rich workstations and simulations over remote networked computers. This approach allows a user to interact with a remote computer using a standard keyboard, mouse, and joystick at a high level of interactivity while using significantly less bandwidth than existing remote desktop applications. Existing remote desktop solutions...
This paper1 describes an original approach based on dynamic programming theory (discrete-time finite horizon Markov control) to address the difficult problem of computing optimal trajectories with respect to some criteria for any vehicle evolving in a given environment (in a probabilistic point of view) to accomplish some tasks (defined in a complex Lipschitz criteria). After a brief remind about...
In this paper, new optimized multilevel biphase pulse compression codes (MBPCC) with low peak side lobe (PSL) and mean side lobes (MSL) have been investigated. Amplitude and phase coding have been used during the optimization process. In previous studies, biphase codes were optimized using genetic algorithm (GA). The robustness of genetic algorithm in solving optimization problems degrades simultaneously...
Intelligence, Surveillance, and Reconnaissance (ISR) is an enormous endeavor undertaken by the Department of Defense (DoD) and the Intelligence Community (IC) to ensure the security of our nation. Within the ISR mission, there is a wide range of techniques used to support information collection including airborne sensors, ground based sensors, human sources, and space based sensors. Most current space...
In order to establish a creditable biological contamination transport model for predicting the cross contamination risk during spacecraft assembly and upon landing on Mars, it is important to determine the quantity and size distribution of bacterial spore containing particles on the surface of spacecraft in cleanroom. We conducted an extensive set of air and surface sampling in indoor, outdoor, and...
In last year's conference, we presented a statistical look at the 316 rideshare missions launched from 1990–2010, examining issues of mass, nations of origin and launch and mission type. Examinations of the data indicated that the broad range of mission types, sizes and participating nations could be classified in several useful ways. For example, we were able to forecast a bifurcation of rideshares...
Juno, the second NASA New Frontiers mission, was launched to Jupiter on August 5, 2011 from Cape Canaveral Air Station onboard an Atlas V launch vehicle. The mission features a solar powered, spinning spacecraft in a highly elliptical polar orbit that avoids much of Jupiter's highest radiation regions. Developing and operating a spacecraft in the environment of space can be a technical and a programmatic...
This paper deals with the association problem of sparse data provided by a ground-based radar system for space surveillance. The method we propose and investigate aims at correlating sets of short arcs originating from successive orbits. When orbital states are unavailable due to limited information contained in each report, metric distances are introduced and used jointly with a time window for the...
Physical attendance at technical conferences maximizes both the professional and personal benefits of participation, and is often required as a condition of publishing. However, circumstances such as injury, literally being at the South Pole, and/or lack of funding may “get in the way”, to say the least. This paper describes how an inexpensive, remote-site controllable camera was used with the existing...
In today's fast paced and ultra-competitive environment, businesses in the aerospace and defense industry may be tempted to cut corners in order to gain a leg up on their competition. Corporate compliance programs help ensure that companies are complying with federal laws and regulations and employees are complying with corporate policies and procedures. Companies in the aerospace and defense industry...
The amount of data in our industry and the world is exploding. Data is being collected and stored at unprecedented rates. The challenge is not only to store and manage the vast volume of data (“big data”), but also to analyze and extract meaningful value from it. There are several approaches to collecting, storing, processing, and analyzing big data. The main focus of the paper is on unstructured...
As aero-engines operate, metal and other material particles are removed from the contact surfaces and are carried away in the flow of lubricating oil. Spectrometric Oil Analysis Program (SOAP) is a powerful tool for elemental analysis of structural metals in the lubricating oils circulating inside the machine, and is suitable for determining wear metal quantity, elemental composition, rate of wear...
The amount of usable charge of a battery for a given discharge profile is not only dependent on the starting state-of-charge (SOC), but also other factors like battery health and the discharge or load profile imposed. For electric UAVs (unmanned aerial vehicles) the variation in the load profile can be very unpredictable. This paper presents a model parameter augmented Particle Filtering prognostic...
Avionics has experienced an ever increasing demand for processing power and communication bandwidth. Currently deployed avionics systems require gigabit communication using optoelectronic transceivers connected with parallel optical fiber. Ultra Communications has developed a series of transceiver solutions combining ASIC technology with flip-chip bonding and advanced opto-mechanical molded optics...
As the development of standards for the aeronautical mobile airport communications system (AeroMACS) progresses, the process of identifying and quantifying appropriate uses for the system is progressing. In addition to defining important elements of AeroMACS standards, indentifying the systems uses impacts AeroMACS bandwidth requirements. Although an initial 59 MHz spectrum allocation for AeroMACS...
The space-based solar power (SBSP) concept was introduced during the 1970s. However, the technology difficulties during that period stalled its development. Nowadays, SBSP has regained the interest of researchers as it is considered a reliable source of green energy. A solar power harvesting method using a spacecraft formation in a Low Earth Orbit has been introduced in the literature. Each spacecraft...
Many modern military communication systems rely on Internet Protocol (IP) mechanisms to provide networking functionality. In addition, mostly all of these military systems are moving towards net-centric architectures, making IP functionality vital to these networks. Despite its prodigious use, IP-type networks tend to struggle when faced with mobility. In many military communication systems, mobile...
Thermal management is challenging in RF communication and radar systems that require high-power levels for operation and reliability as well as small footprints to control intrinsic losses and meet design constraints. An interesting approach uses discrete, in-situ fluid handling and embedded synthetic jet drivers to enhance local cooling at the component. In this approach, fluid cavities and actuators...
Over the years there have been several instances of damage to Space Shuttle Orbiter cold plates during removal and replacement of avionics boxes. Thus, a process improvement team was created to determine ways to prevent this kind of damage. From this effort there were many solutions including, protective covers, training, and improved operations instructions. The focus of this paper is to explain...
With shrinking budgets and expanding program costs, government program offices are seeking innovative ways to accomplish their goals with better efficiency and less cost. In 2008, the U.S. Air Force's Space and Missile Systems Center's Development Planning Directorate (SMC/XRF) took a bold step in this direction and funded a new program that started as an unsolicited proposal from SES Government Solutions,...
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