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Long Description

Throughout the acquisition process, certain tasks must be performed that involve addressing Spectrum Supportability (SS) and Electromagnetic Compatibility (EMC) issues for spectrum dependent systems.  A variety of tools, databases and models are available to assist in these processes from evaluating the appropriate frequency bands for intended operation to detailed modeling of the electromagnetic environment (EME). Please email disa.annapolis.dso.list.jsc-j5-training@mail.mil regarding any of these automated Joint Spectrum Center models.


SPECTRUM XXI

SPECTRUM XXI is a client/server, Windows-based software system that provides frequency managers with a single information system to address spectrum management automation requirements. SPECTRUM XXI supports operational planning and management of the radio frequency spectrum with an emphasis on assigning compatible frequencies and performing spectrum engineering tasks. SPECTRUM XXI is the Joint standard system for spectrum management throughout the DoD. It has also been adopted by the National Telecommunications and information Administration (NTIA) for processing frequency records for Federal agencies. SPECTRUM XXI was also provided to over 22 foreign nations through Foreign Military Sales (FMS) and these efforts have paid off with SPECTRUM XXI being used by all NATO International Security Assistance Forces spectrum management elements in the Afghan Area of Operations. The DSO Systems and Technology Branch (OS33) is the SPECTRUM XXI office of primary responsibility (OPR).

STANDARD FEATURES

  • Frequency Assignment – automates the processing of request for the use of frequency resources from spectrum managers in support of authorized users. The process includes preparation and validation of frequency assignment proposals, determination of interference with the background environment, and distribution and tracking of proposals.
  • Allotment Plan Generator – creates a list of frequencies referred to as allotment plans or channelization plans. These plans are used as frequency resources for nominating proposals using the Frequency Assignment feature.
  • Interference Analysis – analyzes existing frequency assignments for potential interference.
  • Interference Report – generates a report to describe an interference problem and to provide information that can be used to resolve the problem.
  • Topographic Manager –automatically reformats Digital Terrain Elevation Data from the National Geospatial-Intelligence Agency (NGA) for use by the engineering algorithms within SPECTRUM XXI.
  • Compliance Validation- checks for compliance of frequency records with the Frequency Allocation Tables, the NTIA Manual, and the coordination requirements with Canada and Mexico.
  • Engineering Tools – collection of utilities to perform various types of analyses such as coverage and cosite analysis.
  • Electronic Warfare (EW) Deconfliction - assesses the impact of a planned electronic attack (jamming) on existing receivers during contingency operations and exercises.
  • Joint Restricted Frequency List (JRFL) – management tool used by various operational and support elements to identify the level of protection they desire to be applied to specific spectrum assets (i.e. frequencies or frequency bands) in order to preclude these assets from being "jammed" by friendly forces conducting EW activities.

VALUE TO OUR MISSION PARTNERS

SPECTRUM XXI addresses the automated spectrum management requirements processes of the Combatant Commands, Joint Task Force, Services, and the sustaining-base elements. The resulting benefit is interference-free frequencies for the battlefield use while also ensuring that coordination of frequency assignments through national and host nation approval continues.

ADDITIONAL INFORMATION

No service-level agreement is required.


JOERAD

The Joint Spectrum Center (JSC) Ordnance Electromagnetic Environmental Effects (E3) Risk Assessment Database (JOERAD) is a software tool that provides the necessary information to manage the conflict between introduced ordnance and radio frequency (RF) emitters used in Joint operations. The complex environment and accelerated tempo of Joint tactical operations demand full situational awareness and capabilities to evaluate risks associated with the RF sensitive ordnance.  These ordnance items, if not analyzed, can pose a great threat to personnel and equipment or result in excessive emission controls on essential shipboard equipment. JOERAD is a key tool for success in Joint operations for the warfighter.

STANDARD FEATURES

  • Assist in the resolution of potential hazards of electromagnetic radiation to ordnance (HERO) effects on munitions during the planning of Joint or combined operations or exercises as a pre-deployment planning tool.
  • Provides an organic, timely capability to calculate ordnance Safe Separation distances and/or emitter output levels.
  • Provides a capability for planners and commanders to plan for or experiment with various real-world scenarios involving the introduction of ordnance, emitters, and units.

VALUE TO OUR MISSION PARTNERS

JOERAD will enable HERO safe Joint operations by deconflicting potential interactions between ordnance systems and RF emitters.


JOINT SPECTRUM DATA REPOSITORY (JSDR)

The Defense Spectrum Organization (DSO) has been chartered to collect, standardize, and distribute spectrum-related data. To fulfill this mission, the DSO provides direct on-line data access to the Joint Spectrum Data Repository (JSDR) or provides customized reports. The JSDR contains DoD, national, and international spectrum-related information up to the Secret level and can be accessed via the Joint Spectrum Center Data Access Web Server (JDAWS) tool. JDAWS provides user access to the database components of JSDR except Equipment Location-Certification Information Database (EL-CID).

EL-CID information is currently available through the Global Delivery Service, Netstorage.

Enhancements in the coming years will provide additional data sources, data quality assessments, and universal query of organic and federated data sources.  JSDR will be accessible on both the NIPRNet and SIPRNet through attribute-based access controls to ensure availability.

STANDARD FEATURES

The JSDR features the following spectrum-related databases:

  • Joint Equipment, Tactical and Space (JETS) Database - The JETS segment of JSDR is a DSO created and maintained resource that includes: Parametric data for DoD; commercial and coalition equipment (JETS-E); Platform data, including equipment complements (JETS-T); U.S. military unit names, locations and hierarchy (JETS-T); U.S. military unit equipment and platform complements (JETS-T); and space satellite parametric and orbital data (JETS-S); etc.
  • Host Nation Spectrum Worldwide Database Online (HNSWDO) - HNSWDO is a web-based application for processing DoD Host Nation Coordination Requests and responses.
  • Spectrum Certification System (SCS) Database – SCS is the central archive repository for all DoD Spectrum certification system data, including information from the J/F-12 Application for Equipment Frequency Allocation.
  • Background Environmental Information (BEI) Database - To accurately represent the electromagnetic environment, the DSO also collects additional non-U.S. Federal and international frequency assignments, which are stored in the BEI database. The BEI currently includes International Telecommunication Union (ITU), Federal Communications Commission, Canadian, and Radio Astronomy assignments.
  • Government Master File (GMF) Database – The GMF is a data source containing records of the frequency assigned to all U.S. Federal Government agencies in the United States and its possession. Data is obtained from NTIA.
  • Frequency Resource Record System (FRRS) Database – FRRS contains information on DoD frequency assignments used throughout the world that is controlled by the Commanders of the Unified Commands and the Military Departments.
  • Electronic Order of Battle (EOB) Database – The JSDR contains nearly 25,000 Defense Intelligence Agency EOB foreign equipment locations.
  • Area Studies - A collection of over 100 DSO-produced country-specific telecommunication profiles is hosted on Intelink. JDAWS capability provides a list of all area studies with hyper-link access to the Intelink site.

VALUE TO OUR MISSION PARTNERS

The JSDR provides DoD and its mission partners with direct online access to comprehensive, relevant, accurate, and trusted spectrum data, used to characterize spectrum-dependent systems characteristics and define the electromagnetic environment.


OTHER JSC TOOLS


Acronym Name Model Type Description

ARAPP

All-Region All-Platform Propagation

Propagation/Coupling

Provides an initial capability to predict propagation over conducting surfaces coated with a non-conducting material. ARAPP can be used to predict 3-D antenna-to-antenna coupling losses and power density.

COSAM

Cosite Analysis Model

Cosite Model Used to predict the performance of communications and radar receivers operating in a cosite environment of conventional, frequency-hopping,  direct sequence, and radar transmitters.

ELEVAT

Site Elevation Program

Display/GIS Calculates the elevation of a site, given the latitude and longitude, using information from topographic files.

ESP

Exercise Support Program Network Model/Variants An automated tool to support the engineering of multichannel networks. It calculates estimated short-term reliability for tactical multichannel equipment in the 4400-5000 MHz frequency band.

FDR DLL

Frequency-Dependent Rejection Dynamic Link Library Component Linkage Calculates Frequency-Dependent Rejection (FDR) and Frequency-Distance (F-D) relationships between a potentially interfering transmitter and a victim receiver.

FDRCAL DLL

Frequency-Dependent Rejection Analysis Package

Component Linkage FDRCAL was developed for the Technology Transfer Program (TTP).  FDRCAL calculates Frequency-Dependent Rejection (FDR) and Frequency-Distance (F-D) relationships between a potentially interfering transmitter and a victim receiver.  FDRCAL also produces a file from which plots of both FDR and F-D can be made.  Applicable frequency range is 1-20000 MHz.  Nonlinear effects are not modeled.

FOREST

Forest Propagation Model Propagation/Coupling A propagation model which provides an estimate of the attenuation of a radio wave passing through a forested environment.

GATE

Graphical Analysis Tool for Electromagnetic Environments Intersite An intersite cull model designed to analyze the effect of introducing a new transmitter(s) and/or receiver(s) into an existing environment of RF equipment

GEOPAC

Coordinate Conversion Program Display/GIS Converts coordinates from UTN to geographic and vice versa, and from military grid to geographic and vice versa. Also provides bearing and distance between two points or endpoint coordinates given a point, distance, and bearing to the endpoint.

GPS-ITAS

Global Positioning System Integrated Topographic Analysis System Intersite Used to assess the impact on jammers (used to support range testing) on civilian GPS receivers. Generates a signal level contour produced by a single or by multiple test range jammers and presents the contour over a background of feature data, e.g., political boundaries.

HYDRO86

Precipitation Scatter Coupling Model Propagation/Coupling Determines the possibility of interference, due to rain scatter, between earth stations of a communications satellite system and stations of terrestrial line-of-sight radio relay systems.

IHAP

Intermodulation and Harmonic Analysis Program Component Linkage Performs intermodulation and harmonics analysis on a user-supplied frequency list, eliminating problem frequencies until an intermodulation-free list and/or harmonic-free list remains.

IntCalc

Intermodulation Calculator Component Linkage Determines all possible intermodulation (IM) products produced by collocated transmitters; or conversly, determines frequency ranges for an introduced transmitter that will not produce IM products within the bandwidths of existing receivers.
IONCAP Ionospheric Communications Analysis and Prediction Propagation/Coupling IONCAP calculates the ionospheric parameters, propagation frequency estimates, and system performance evaluation for radio propagation via the ionosphere.  Calculation of antenna gains are made only for frequencies from 2 to 30 MHz.

ITAS

Integrated Topographic Analysis System Intersite A modular software system developed to analyze the effects of electronic equipment in a region. The analysis capabilities modules available in ITAS are the Propagation Analysis Module (PAM), Shielding Analysis Module (SAM) and Target Acquisition Module (TAM). ITAS includes the capability to draw plots of the surface of the earth with the analysis results superimposed over the natural and political boundaries as well as other enhancements to the plot such as marking locations etc.

JEET

Joint E3 Evaluation Tool Intersite Examines potential E3 interactions between equipment scheduled for operational testing and existing equipment in the DoD inventory.

MIXPATH

Mixed Path Model Propagation/Coupling Provides propagation loss predictions for paths over two or more types of Earth.

MMWAVE

Millimeter Wave Propagation Model Propagation/Coupling Calculates the propagation loss and provides predictions of signal attenuation and phase dispersion of electromagnetic waves to the 0.1 to 300.0 GHz range. May be used for both terrestrial and earth-space (satellite) transmission links but is limited to radio line-of-sight (LOS cases only.

MMWDRV

Millimeter Wave Propagation Prediction Driver Propagation/Coupling Interface to allow execution of the Millimeter Wave Propagation Model (MMWAVE) subroutines on a PC

MMWPROP

Millimeter Wave Propagation Prediction Program Propagation/Coupling Predicts the attenuation due to free space spreading, molecular absorption, and rain absorption and scattering not exceeded P% of the time over a given SHF or EHF (1 to 300 GHz) link.  Estimates of molecular phase dispersion may also be obtained.

MPS

Master Propagation System Propagation/Coupling MPS is a driver program for the TIREM, SEM, EFFSECC, IF77 and ARPROP models

PALPAM

Planar and Linear Phased-Array Analysis Model Antenna Model Predicts the directivity and far-field and near-field gain patterns of a phased-array antenna whose elements can be identified with lattice points on a 160-by-160 grid

POWDEN PDP

Near-field Power Density Program Intersite The POWDEN DLL is a reusable software component.  It contains two power density programs:  POWDEN, which calculates near-field power density and field strength, and Distance at a Power Density (NEDWOP), which calculates the farthest distance from a transmitter for a given field strength and power density.  POWDEN is designed for rectangular and circular aperture antennas having only certain illumination types.  It is included in both the Joint E3 Evaluation Tool (JEET) and Joint Ordnance E3 Risk Assessment Database (JOERAD) models.

ProPack

Propagation Analysis Package Propagation/Coupling ProPack is used to determine propagation loss of electromagnetic waves

RADCOM

Radar and Communications Electromagnetic Compatibility Analysis Program

Intersite

Designed for performing electromagnetic compatibility (EMC) analyses on radar and communication systems. RADCOM has five analysis modules: two system analysis modules, the Radar Analysis Capability (RAC) and the Communications Analysis Capability (CAC), and three ancillary modules, the Frequency-Dependent Rejection Calculation (FDRCAL), Receiver Performance Prediction (REPP), and Propagation Prediction (PROP) modules. The RAC and CAC provide for system-level assessment of potential for electromagnetic interference (EMI), whereas the ancillary modules provide for analysis on limited aspects of the overall electromagnetic compatibility (EMC) assessment. RADCOM also has the capability to interface with Microsoft Excel worksheets so that its features can be used as a tool to aid in frequency-environment analyses. RADCOM is a one-on-one analysis tool - it assesses the effects from a single radar or communications interferer on the system being analyzed. Inherent in RADCOM is the capability to account for frequency agility and antenna motion (scanning) of either interferer or receiver system. RADCOM also has the capability to account for interference losses resulting from filtering and/or processing in the receiving system. Predictions of propagation path loss are made primarily using the free-space equation, a smooth-earth model, or a rough-earth model, although provisions are also made for using the path loss that may be provided by outside sources. The smooth-earth model used by RADCOM is the Spherical Earth Model (SEM). The rough-earth model is the Terrain-Integrated Rough-Earth Model (TIREM).

RRSM

Radar Receiver System Model Intersite An automated capability to perform detailed analyses on radar signal processing that can be used to assess the effects of interference on radar system performance.  RRSM emulates the receiver signal processing to determine interference processing loss, radar range reduction and/or probabilities of target detection and declaration.

SATELL

Satellite Look Angles Program Satellite Model Provides earth station satellite look angles for geostationary satellites

SATPROP

Satellite Propagation Satellite Model Computes several propagation loss parameters for an earth-to-space path (or vice versa)

SEMDRV

Spherical Earth Model Driver Propagation/Coupling Interface to allow execution of the SEM DLL subroutines on a PC

SEM DLL

Spherical Earth Model+B60 Dynamic Linked Library Propagation/Coupling A collection of subroutines whose primary output is path loss and mode of propagation.  The SEM propagation model is applicable to paths over a smooth, spherical, homogeneous,  imperfectly-conducting earth

SPECTRUM XXI

Spectrum Management Software Spectrum Management Software A distributed application providing spectrum management services and functionality to the Spectrum management community

STATGN

Statistical Antenna Gain Calculator Component Linkage A collection of simple computer models that provide statistics-based estimates of antenna characteristics
TIRDRV Terrain-Integrated Rough-Earth Model Driver Propagation/Coupling TIRDRV was developed as a simple FORTRAN interface to allow execution of the TIREM propagation model on a PC for testing purposes; however, its simplicity and reliability warranted certification for distribution.  Data is entered through a series of successive prompts.  Path profile spacing and interpolation option are user specified.  Most importantly, the path end points can be incremented/decremented, allowing TIREM losses to be calculated at various points along a single profile.

TIREM DLL

Terrain-Integrated Rough-Earth Model Dynamic Linked Library Propagation/Coupling A propagation model that evaluates the terrain profile between two sites and, based on the geometry of the profile, selects a mode of propagation

TOPOMAN

Topographic Manager Display/GIS An automated capability that creates topographic data files by converting the NIMA Level 1 Digitized Terrain Elevation Data (DTED)  into a format suitable for use as input to other M&S models that require topographic terrain data

TVPack

Terrain Visualization Package Display/GIS Provides three options to plot, process, and view topographic data in various perspectives: horizon, three-dimensional perspective, and path profile

URBAN

Urban Propagation Model Propagation/Coupling A propagation model which uses an empirical technique for estimating the propagation loss expected in urban, suburban, or open environments

VIEW

Visual Interactive EMC Workstation Intersite Provides a broad array of electronic map based tools for displaying analysis results and generating report quality graphics

VLF

VLF and LF Propagation Model Propagation/Coupling Calculates the vertical electric field strength that would be generated by a vertical antenna operating in the .010 to .100 MHz frequency band for distances d within a specific range
WOTL Worldwide Topographic Loader Display/GIS WOTL is an automated capability that creates topographic data files by converting the NIMA Level 1 Digitized Terrain Elevation Data (DTED), distributed on CD-ROMs, into a format suitable for use as input to other M&S models that require topographic terrain data, such as the Terrain Integrated Rough-Earth Model (TIREM) on the UNIX/Solaris and Silicon Graphics (SGI) workstations.
WOTRET WOTL Retrieval Program Display/GIS WOTRET is a library of subroutines that can be used to extract elevations and create profiles from topographic data files created with TopoMan.

For questions regarding any of the information located in the Spectrum and E3 Compliance SIA, please contact the Joint Spectrum Center at: disa.annapolis.dso.list.jsc-j5-training@mail.mil

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