ITC/USA 2010 Conference Proceedings / The Forty-Sixth Annual International Telemetering Conference and Technical Exhibition / October 25-28, 2010 / Town and Country Resort & Convention Center, San Diego, California / The RCC IRIG Chapter 10 standard requires that Chapter 10 recorders use the STANAG- 4575 (NATO Advanced Data Storage Interface) file system to store data files. The STANAG-4575 standard defines a linear file system in which each file is stored in a single contiguous block of disk space. There is a small directory listing at the beginning of the disk. This listing stores the starting position and length for each file. It also stores the file's name and its creation date and time. This file system is very efficient for storing files that are recorded sequentially because it does not require the disk to constantly update a file allocation table on each write. Unfortunately, the STANAG-4575 file system is not directly supported by Microsoft Windows. This means that it is not possible to simply attach a recorder's disk to a PC and copy the files directly using Windows Explorer. This paper will discuss an approach that allows the contents of a STANAG formatted disk to be read from a standard Windows PC. In addition to copying files from the disk, this approach allows several other useful operations to be performed on the disk. These operations include advanced copy options such as partial file copies and splitting files into multiple pieces. It can also provide a mechanism for deleting files, reformatting the disk and performing a sanitization procedure on a disk to declassify it.

International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / NATO NAFAG Air Group IV (AG IV) established the NATO Advanced Data Storage Technical Support Team (NADS TST) to investigate the technology and to develop an interface Standardization Agreement (STANAG) for recording, storage, and exchange of imagery data. Government agencies and industry involved in these technologies are participating in this effort.

ITC/USA 2006 Conference Proceedings / The Forty-Second Annual International Telemetering Conference and Technical Exhibition / October 23-26, 2006 / Town and Country Resort & Convention Center, San Diego, California / The IRIG 106 Chapter 10 Standard has evolved significantly since its inception. This paper covers the background, technology, status, users, supporting vendors and future considerations such as ground-based recording and archiving. Also covered are samples of toolsets available for troubleshooting, validation, data processing and display of Chapter 10 data

<p>Instrument Control Sweden (ICS) is a software company that develops NATO STANAG 4586 compatible ground station software for control of unmanned systems such as unmanned aerial vehicles (UAVs). To perform testing and demonstration of the ground station software ICS needs a realistic UAV simulator that implements the STANAG 4586 protocol. This thesis studies what methods are best suited for the rapid development of such a simulator.</p><p>One goal with the project was to examine what existing flight simulator systems and flight dynamics models can be used to rapidly develop a UAV simulator. Another goal was to design and implement such a simulator. It is found that it’s possible to quickly develop a UAV simulator based on existing projects such as the flight simulator FlightGear, the simulation framework OpenEaagles and the flight dynamics model (FDM) JSBSim.</p><p>The design of the simulator is modular, object-oriented and features real-time design techniques. The main application is a simulation of a Vehicle Specific Module, which implements the STANAG 4586 protocol. Another module based on the OpenEaagles framework simulates the aircraft and its subsystems. A third module consists of the JSBSim FDM and simulates the flight dynamics and movements of the aircraft under the forces and moments affecting it.</p>

Instrument Control Sweden (ICS) is a software company that develops NATO STANAG 4586 compatible ground station software for control of unmanned systems such as unmanned aerial vehicles (UAVs). To perform testing and demonstration of the ground station software ICS needs a realistic UAV simulator that implements the STANAG 4586 protocol. This thesis studies what methods are best suited for the rapid development of such a simulator. One goal with the project was to examine what existing flight simulator systems and flight dynamics models can be used to rapidly develop a UAV simulator. Another goal was to design and implement such a simulator. It is found that it’s possible to quickly develop a UAV simulator based on existing projects such as the flight simulator FlightGear, the simulation framework OpenEaagles and the flight dynamics model (FDM) JSBSim. The design of the simulator is modular, object-oriented and features real-time design techniques. The main application is a simulation of a Vehicle Specific Module, which implements the STANAG 4586 protocol. Another module based on the OpenEaagles framework simulates the aircraft and its subsystems. A third module consists of the JSBSim FDM and simulates the flight dynamics and movements of the aircraft under the forces and moments affecting it.

International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada / There are clear signs that data recorders using solid-state and disk-based technologies now represent a serious alternative to conventional linear and rotary tape recorders for a broad spectrum of data capture applications. As the number of RFQs specifying these so-called ‘new technology’ solutions increases, virtually every major manufacturer has responded with announcements of new off-the-shelf products. A NATO technical support team has even been tasked with drafting standards for certain aspects of solid-state and disk recorders. But what has caused this sudden explosion of interest? Strange to say, in almost every case it has been the perceived shortcomings of the new technologies which have forced the issue. For all their advantages, solid-state and disk recorders are essentially only temporary storage devices. To overcome this problem manufacturers have found it necessary to address the total data capture/storage/distribution/archiving scenario – with some interesting results. It is in the ‘data handling’ area therefore that some of the most significant advances are to be found. This Paper offers an overview of some of the new technology solutions now available - RAID (Redundant Arrays of Independent Disks), JBOD (Just a Bunch Of Disks) and FLASH memory recorders. New paradigms for airborne, mobile and laboratory data collection, handling, analysis and archiving are discussed, demonstrating that (for once) the migration path has been carefully thought through, with industry-standard data interfaces, true computer connectivity (Windows and UNIX) and familiar control techniques. It concludes that many users with a keen interest in replacing legacy products for whatever reason can now do so with confidence and minimal disruption to their day-to-day operation while nevertheless gaining access to the important benefits which ‘new technology’ solutions can offer.

HF communication has been used for more than a century and to this day still fulfils an important function in communications networks. In order to interface with modern communications protocols, solutions have to be designed to facilitate data communication over HF (High Frequency). STANAG 5066 is one such solution which provides an application independent ARQ (Automatic Repeat Request) bearer service for client applications. A need exists within the STANAG 5066 specification for a DRC algorithm. The objective of such an algorithm is to select the optimum data rate and interleaver size, based upon current HF channel conditions, to maximise the data throughput over the HF link. In this dissertation previous implementations of DRC algorithms were studied and evaluated. In literature it was found that algorithm implementations used the FER and no channel information to make a data rate choice. This resulted in algorithms that tended to oscillate between data rate choices, and was very slow to react to changes in the HF channel. A new DRC algorithm was designed and simulated that uses the SNR (Signal-to-Noise Ratio) and the BER estimate to make a data rate choice. The DRC algorithm was implemented in a commercial STANAG 5066 system and tested using HF data modems and a simulated HF channel. The results of the implementation and testing show that the designed DRC algorithm gives a better performance, is quicker to adapt and is more robust than previous DRC algorithms. This is also the first DRC algorithm that has been designed to use channel information, such as the SNR and BER, to make a data rate choice. / Dissertation (MEng)--University of Pretoria, 2007. / Electrical, Electronic and Computer Engineering / unrestricted

STANAG 5066 Edition 2 is a node-to-node protocol developed by NATO in order to communicate via HF media. IP integration is made to be able to spread the use of STANAG 5066 protocol. However, this integration made the communication much slower which is already slow. In order to get faster the speed and communicate within single-frequency multi-node network, HFTRP, which is a derivative of WTRP, is developed. This protocol is in two parts, first is a message design for management tokens exchanged by communicating nodes, and second is the algorithms used to create, maintain, and repair the ring of nodes in the network. Scope of this thesis is to find out a faster ring setup, growing procedure and to implement. Beside, finding optimum values of tuning parameters for HFTRP is also in the scope of this thesis.

In this research, STANAG 4285 HF modem software is implemented on TMS320C54x fixed point digital signal processor. The software is optimized in order to meet real-time operation requirements. A fractionally spaced least mean square (LMS) decision feedback equalizer (DFE) is employed for the receiver. In order to improve the convergence of the LMS algorithm a multipass technique is utilized. Based on Watterson&rsquo / s model, an HF channel simulator is employed for evaluating the performance of the modem. The simulation results show that the convergence of the LMS algorithm is improved by using multipass technique. It is also shown that the software meets the real-time operation requirements.

Noise generation from underwater activities propagates into the marine environment.For marine vessels the propulsion system generates the most noise during itsoperations. Naval vessels that want to operate without being detected want to controlthe sound generating properties of the vessel. To control the sound generatingproperties this project has been looking into the existing propeller of the submergedcraft Carrier Seal that is produced by James Fisher Defense. Then a new and bespokenpropeller has been developed with theories applied to minimize its noise generatingproperties. The properties of the propeller that have been altered is the number ofblades, blade area ratio, pitch and skew angle. These properties have been alteredwith aid of the open-source software for Matlab named Openprop. From the finalpropeller design a prototype was later produced, tested and compared to the existingpropeller of the Seal Carrier. To test and compare these two propellers a test procedurewith inspiration from NATO and the Swedish Defense and Research Agency (FOI) wasdeveloped. The results from the comparison show that the sound pressure level fromthe propeller spectrum could be lowered with 3 dB re 1 μP a for the vessels design speedand several blade tones could be eliminated entirely. Simultaneously the efficiency ofthe vessel is increased throughout its speed range.In conclusions the recommendation to JFD is to change their existing propeller tothis bespoken propeller as it has proven itself to better in every way during thesetrials. / Ljud som genererats under vatten sprider sig långt från källan där de uppstått. Frånmarina fartyg är det framdrivningssystemet som står för majoriteten av det genereradeljudet. För militära fartyg som inte vill upptäckas är det av yttersta vikt att minimeraljuden som genereras ombord. För att kontrollera detta har det här projektet riktatin sig på fartyget Carrier Seal som tillverkas utav James Fisher Defense (JFD) ochdess propeller. Den existerande propellern har analyserats och därefter har en nyoch förbättrad propeller utvecklats. Utvecklingen har gjorts genom att tillämpatillgängliga teorier som gått ut på att minska propellerns ljudskapande egenskaper.Propelleregenskaperna som har undersökts är antalet blad som propellern har, dessbladtäckningsgrad, stigning och skevningsvinkel. Dessa egenskaper har varierats medhjälp av mjukvaran Openprop som körs i Matlab för att hitta en kombination somgenererar mindre ljud än sin föregångare. Därefter har en prototyp tillverkats ochtestats för att sedan jämföras med den existerande propellern. Testproceduren somgenomförts har tagits fram med inspiration från liknande procedurer som genomförtsav NATO och FOI. Resultatet från jämförelsen visar att ljudtrycksnivån från propellernhar kunnat minskats med 3 dB re 1 μP a för hela propellerspektrumet vid farkostensmarschfart och flertalet bladtoner kunde elimineras helt och hållet. Samtidigt someffektiviten kunnat förbättras över hela fartområdet.Slutsatsen som kan dras av arbetet är att JFD rekommenderas att byta deras nuvarandepropeller till den förbättrade propellern eftersom den har visat sig avsevärt mycketbättre under dessa tester.