This document describes the work in the project Dynamic Electronic Warfare Duel Simulation during 2010. The project uses and improves the multispectral framework EWSim (Electronic Warfare Simulation interface model) for distributed electronic warfare simulations. The framework consists of three parts, one for scenario planning and configuration, where models are configured and where some range calculations can be made, one for dynamic duels, and finally one assessment module where the duels can be replayed and logged data can be analyzed. EWSim contains models of platforms, countermeasures, warners, sensors and missiles with target trackers and motion models. An entirely new map module has been created which we call Map3D. The new module is distinguishes from the old by allowing easier access to external software products. Sensor coverage charts affected by electronic warfare and tracks can now be visualized and edited in 3D. In the international collaboration project EW COMARMS a feasibility study was completed this year in which the possibility to define a modular hardware and software architecture for electronic warfare simulation was evaluated. The study concluded that a project continuation under the European Defence Agency umbrella is a very slow process to start up, since all countries can't agree on budget and staff. This makes it difficult to start a project. This year we have added the functionality to read position data from a Global Positioning System (GPS) and create target tracks. Tracks can also be created from data obtained from the Automatic Identification System (AIS). Radar and IR target signature has been improved and can now be defined with lookup tables. This has been used during the annual FOCUS exercise in which the air defence and the air force take part. Algorithms and methodology for signal strength measuring receivers to calculate the position from a transmitter with unknown output has been developed. The algorithm chosen to find the maximum of the combined probability distribution is a so-called particle filter. In collaboration with the project Future needs of DAS, work has begun in which EWSim is used for modelling a generic Defensive Aid System (DAS). Also radar Electronic Support Measures (ESM) is designed to be a part of the generic DAS with sensors in collaboration. During the year, a methodology for using computer generated images with high dynamic range in Hardware In the Loop (HWIL) simulations has been developed. The scope has been to apply software models of a missile's electro-optical components: reticle, optics and sensor, with a high resolution HDR 2D-image of the scene as input in HWIL simulations. The tools developed in the project are based on proprietary code and open source software (eg software released under LGPL license) which means that there are no licensing fees for distributing the software within the Swedish Defense organization. Thus, the distribution of the programs would be far easier than if it were licens fees. In addition, the freedom to experiment and check the entire system is very useful to be able to do in this type of research project.