Posted: May 26, 2019 | Modified: February 01, 2021

The Directed Radio Frequency Energy Assessment Model (DREAM) is an engineering/engagement level model that simulates the interaction between a High-Power Radio Frequency/Microwave Directed Energy Weapon (HPM DEW) and a target system and calculates/estimates a target’s probability of electronic upset and/or damage as a function of the HPM DEW power density on target and range. DREAM is primarily used for making pre-test predictions and investigating the HPM DEW concepts.

DREAM runs on modern personal computers (PCs) that use Microsoft (MS) Windows operating systems, such as Windows 7 and now Windows 10. DREAM was originally developed by ARL and SPARTA, Inc under the sponsorship of the Joint Technical Coordinating Group on Aircraft Survivability (JTCG/AS) and ARL. The Air Force Research Laboratory (AFRL) is now the model manager for DREAM. DREAM is now available through the Defense Systems Information Analysis Center (DSIAC) website.


DREAM’s primary inputs are a fault tree description of the target system and the basic characteristics of the HPM DEW engaging the target (i.e., the frequency, pulse width, pulse repetition frequency (PRF) power, and antenna gain of the HPM source). It also requires the user to select the type of critical electronic component of interest in the target (i.e. Transistor, Digital Integrated Circuit (IC), etc., the type of Port of Entry (POE) for the HPM to enter the target (i.e., dipole, aperture, etc.)  and the transmission loss from the POE to the component.


DREAM calculates the probability of electronic upset and/or damage for the overall target system or for any of the sub-systems shown in the fault tree vs the incident power density from the HPM DEW and range. DREAM also provides a summary of the target modeled and HPM DEW parameters used in the analysis. The model can also provide the probability of upset/damage for the critical components selected as a function of the power reaching the critical component.

DREAM’s outputs can be used to estimate the effective radiated power required for an HPM DEW to defeat a Red target for HPM concept studies or it is used to estimate the hardening/protection levels required for a Blue system to survive a threat emitter. DREAM’s outputs can also be used as inputs (i.e., look-up tables) for higher-level, force-on-force models to investigate the effectiveness of HPM DEWs on the battlefield.

Model Specifications
Version 2.02
Archived Versions Available
Host Systems Windows OS 7 and 10
Program Language Nokia's Qt Development Environment (a modern C++ compiler)
Software Change Request Database
Page Distribution

Distribution Statement A: Approved for public release; distribution is unlimited.

Model Distribution


DISTRIBUTION STATEMENT D. Distribution authorized to the Department of Defense and U.S. DoD contractors only, critical technology, 10 April 2018. Other requests for this software shall be referred to Air Force Research Laboratory/RDHE, Aberdeen Ave. S.E., Kirtland AFB, NM 87117-5776.

WARNING− This media contains technical data whose export is restricted by the Arms Export Control Act (Title 22, U.S.C., Sec 2751, et seq.) or the Export Administration Act of 1979 (Title 50, U.S.C., App. 2401 et seq), as amended. Violations of these export laws are subject to severe criminal penalties. Disseminate in accordance with provisions of DoD Directive 5230.25.


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