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SATSOFT Composite View aggregates all objects in the scenario.

SATSOFT speeds the process of planning, de-signing, and marketing communication satellitepayloads. Quickly assess antenna coverage

and gain, conduct antenna trade studies, de-velop shaped beam and multi-beam antennadesigns and complete many other tasks re-quired for payload design and regulatory filings.SATSOFT was written for the systems engineeras well as the antenna specialist. Its graphical

user interface enables users with even a basicknowledge of antennas to use the software pro-ductively. Advanced tools will appeal to the an-

tenna specialist. If you need software to modelsatellite antennas for GEO, LEO or MEO con-stellations, SATSOFT was written for you. Free30 day evaluations available at www.satsoft.com. See for yourself what SATSOFT can dofor you.

v 2.7

Satellite Antenna Design and

Systems Engineering Software

Please visit www.satsoft.com for the latest information

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Performance tables of gain, EIRP, G/T and other parameterscan be prepared for cities and synthesis stations.

Analyze Your Current System & Plan Your NextSATSOFT provides essential tools for analyzing your currentsatellite communications system and planning your next one.Many tools are provided for designing and analyzing space-based communications antenna systems. Basic featuresinclude map and contour plotting, coordinate system conver-sions, file import/export, boresight rotation, pointing boxes,

visibility contours, performance tables, and other features.Context-sensitive help is available for dialog boxes, toolbarbuttons, menus and views.

SATSOFT Complements Your Other SoftwareWindows clipboard support and extensive file import andexport capabilities lets you do more with SATSOFT. Copygraphics to the clipboard for use with Microsoft Office pro-grams. Import antenna patterns from other modeling programssuch as GRASP and POS. Load patterns from the ITU data-base. File antenna patterns electronically with the ITU.

Simplified Antenna Pattern SynthesisComplex algorithms simplify antenna beam-shaping exercises.Select an antenna model and specify its parameters. Create acoverage definition with the polygon editing tools and fill it withcomponent beams and synthesis stations using the automatedtools provided. A single click of the mouse optimizes, com-putes and displays the pattern. Results are obtained in sec-onds on Pentium II class hardware, even when high fidelitymodels are being used, such as the optional SATSOFT/PO, aphysical optics reflector model.

Contour Plots of EIRP, G/T, C/I, and MoreA fast contouring engine within SATSOFT produces plots

quickly and accurately. Intelligent auto-ranging and zoom-in/zoom-out functions make it easy to view a desired range ofdata. You can also create plots at a precise scale for overlay-ing or for use when digitizing coverage areas and contours.

Conversion from directivity or gain to other parameters isaccomplished by specifying a dB offset. By applying slant-range path-loss compensation, flux density contours can becomputed. SATSOFT will also plot copol/crosspol ratios forvector antenna patterns.

Maps From Any Altitude or ViewpointSATSOFT transforms antenna contours, geopolitical maps,coverage polygons, cities, and other features into any of nine

different display coordinate systems, simply by making thedesired choice. The four most commonly used antennacoordinate systems are provided for pattern import anddisplay. Azimuth-Equidistant and Equirectangular (rectangularlat, long) projections are also provided. The earth is modeledas an oblate spheroid.

Interactive Antenna Boresight RotationClick and drag the antenna pattern to change its boresight, orspecify the boresight angles directly.Antenna boresight mayalso be pointed at a fixed position on the map.

SATSOFT Highlights

Shaped patterns can be synthesized using the integrated an-tenna models or imported component beam sets.

Specification of antenna model parameters is simplified bysmart dialog boxes that provide instant performance feedback.

Contour type, levels, polarization, path-loss and other proper-ties can be specified quickly and easily.

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Automated Antenna Pattern SynthesisPerform antenna trade studies using single beam, multi-beam, andshaped beam designs.

Synthesize shaped patterns from one or more coverage polygons inminutes. Single-click shaped pattern synthesis.

Automatic creation of component beam and synthesis station gridsfrom coverage polygons.

Full suite of graphical editing tools to add, delete, move, or change

parameters of beamlets and stations.Mini-max optimizer works with all antenna models and importedcomponent beam sets.

Show component and/or composite contours with a single click.

Create and edit tables of beamlet positions and polygon vertices.

Quickly trade performance with different antenna models, e.g.,phased array vs. reflector (antenna models are optional).

Contour PlottingPlot contours of directivity, EIRP, G/T, C/I, & other parameters.

Plot contours of copol/crosspol ratios for vector antenna patterns.

Full control over which beams in a multi-beam design are plotted.

Specify and plot component and composite contours independently.

Specify contour levels, line styles, colors, font, etc. Fill contours.

Slant-range path-loss compensation enables computation of fluxdensity and carrier to thermal noise contours.

Intelligent auto-ranging and zoom-in/zoom-out functions.

Create plots at a precise scale for overlaying or as an aid in digitizingcontours and polygons.

Whittaker/Shannon interpolation/reconstruction of antenna patternssaves a significant amount of computer time and disk space by ena-bling the use of coarse pattern grids. Reduces computation time ofhigh fidelity antenna models by an order of magnitude.

Coordinate Systems and Maps

(u,v), (,), az/el, el/az, azimuth equidistant, orthographic, azimuthequal-area, and equirectangular coordinate systems.

The earth is modeled as an oblate spheroid consistent with theWGS84 geoid. DCW World map and city databases are provided.

City database (MS Access format) of over 1600 of the largest citiesin the world connected via standard Windows ODBC drivers.

Plot pointing box, city name and/or designator at each city location.

Elliptical and rectangular pointing boxes computed from spacecraftroll, pitch, and yaw errors.

Interactive boresight rotation. Click and drag the antenna pattern tochange its boresight.

Specify boresight in (az, el), (lon, lat), or in terms of 3 Euler angles.

Plot meridians and parallels.

Mouse Coordinates Pane displays coordinates of the mouse in userselectable coordinate system.

Plot a sin space unit circle in any coordinate system.

Plot a boresight marker.

Plot visibility (elevation) contours with control of thickness, line style,color, and labeling.

Polygon Creation & Editing ToolsA full suite of editing functions is provided.

Create and edit polygons with the mouse or any Windows compati-ble digitizing tablet.

Create and edit polygons from a table of coordinates.

Move, copy, rotate, delete, undelete, split, join, downsample func-tions. Change line style, color, label, thickness, etc. Fill polygons.

Compute the solid angle subtended by the polygon and correspond-ing maximum directivity, and polygon centroid.

Create grids of polygons with the grid creation tool.

Digitize existing antenna contours with any Windows compatibletablet.

SATSOFT Features

Performance TablesPrepare tables of antenna performance at city and station locations.

Directivity, gain, EIRP, G/T, flux density, and other parameters canbe tabulated in spreadsheet format.

Copy and paste tables into Excel and other applications, print, andexport to file.

File Import and Export CapabilitiesImport CPLAN work files.Export performance tables in tab delimited format (for spreadsheetimport) via file or clipboard.

Export vector graphics in Windows enhanced metafile (EMF) format.

Import scalar and vector antenna patterns defined in (u,v), (,),

az/el, and el/az coordinate grids.

Import and export SATSOFT (CPLAN), GRASP, ACP4, Eutelsat,and stk antenna pattern files. Regular & irregular grids (measuredpatterns) can be imported.

Export synthesis station grids in SATSOFT (CPLAN) or TICRA'sPOS4 formats.

Import and export antenna contours in SATSOFT, stk, shapefile, andITU Graphics Exchange (GXT) format.

Export reflector geometry in TICRA's GRASP7 format.

Import and export coverage polygons and map data in SATSOFT(CPLAN), stk, shapefile, TICRA .pol and GXT formats.

Windows Clipboard SupportCopy vector graphics to clipboard for import to Microsoft Office andother applications.

Copy & paste antenna and polygon objects, city lists, performancetables, beamlet locations, polygon vertices, and feed excitations.

MiscellaneousGUI conforms to standard Windows user interface guidelines.

Context sensitive help for dialog boxes, toolbar buttons and menus.

Tree view shows hierarchy of satellites, antennas, polygons, andfacilitates copying & moving of these objects.

Drag and drop work files, pattern files, coverage polygon, contour,and GXT files from Windows Explorer.

Dynamic memory throughout, so the number and size of antennapatterns, contours, polygons, satellites, beamlets, and stations islimited only by available memory and disk space.

Customizable toolbars.

Antenna ModelsConsistent interface to all antenna models. Beam layout,optimization, contouring, interpolation, etc, works the same for allmodels.

A Gaussian Beam model is provided for modeling circular andelliptical beams.

SATSOFT Professional (SATSOFT/PRO)Plot Edge of Coverage (EOC) contours for a specified polygon.

Expand & contract polygons by the satellite pointing error.

Automatically expand coverage polygons by the satellite pointingerror during synthesis station generation.

Resample antenna patterns for a specified resolution & coordinatesystem, for example, (u,v), (az,el), (lat,lon)

Create shaped beams designed to service a coverage area frommultiple orbital slots.

Prepare performance tables with pointing error degradation, patternslope, crosspol C/I, and axial ratio.

Draw pointing error ellipse at polygon vertices.

Multiple shaped beams can be synthesized simultaneously usingany antenna model or imported component beam file.

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Downlink adjacent beam C/I contours can be computed with SATSOFT/IAM. Secondary beamsspaced 1.7 beamwidths apart were used in the analysis. SATSOFT/PO used to compute the beams.

Component beam and synthesis station grids can begenerated automatically for any set of coverage polygons.

SATSOFT/PRO gives you single-click polygon expansion.

Shape multiple patterns with SATSOFT/PRO. Constant-flux polygon layouts are created with SATSOFT/PL.

Antenna ModelsA Gaussian beam model is provided with SATSOFT forgenerating simple elliptical and circular beams. Severaloptional antenna models are available including an analyticalreflector model, a high fidelity physical optics reflector model,and an analytic phased array model.

SupportAn annual support and upgrades (ASU) contract providestechnical support and version upgrades at a significantly lowercost than purchasing individual upgrades.

RequirementsSATSOFT is supported on Windows 98, NT4, 2000 & XP. APentium II class machine or better with 128 MB or more of

RAM is recommended.Free 30 day evaluation available at www.satsoft.com

SATSOFT/AR Analytic model of an offset reflector. Directivity deter-mined by PO integration of an on-focus feed. Scan aberration andcrosspol are neglected. All components beams are identical. Compu-tation is extremely fast. Useful for preliminary design work.

SATSOFT/PAM Analytic model of a rectangular array fed by a Butleror Nolan Matrix with cosrelement pattern. Rectangular and triangularelement lattices supported. Computation is extremely fast.

SATSOFT/PL Produces optimized sets of coverage polygons forcreating constant flux multibeam antenna designs.

SATSOFT Options

Copyright 2000 - 2007 by Satellite Software Incorporated. All rights reserved. Specifications are relevant to software version 2.7, released Dec 2006 and are subject to change withoutnotice. Other products and companies referred to herein are trademarks or registered trademarks of their respective companies or mark holders.

SATSOFT/PO Vector reflector modeling program using the physicaloptics method. Accurate far-field predictions of directivity andcrosspol. Linear or circular polarization. Single and dual-mode feedmodels. Purchase of PO option includes use of the AR model.

SATSOFT/DMO Dual-mode optimizer for multibeam antennadesigns which must accommodate a non-contiguous outputmultiplexer. Feed excitations are constrained to be orthogonal, whichis necessary for lossless network realization.