Complete link analysis can be computed over time using STK's satellite orbit propagation/geometry engine coupled with the 
definable receiver and transmitter properties. Time-varying constraints such as Doppler shift and bit error rate linked with a 
full range of environmental models enable communications engineers and analysts to provide link performance study that no 
spreadsheet can match. Users can investigate communications scenarios which include:
<p/>
<ul>
	<li>TIREM atmospheric absorption loss compute model, using terrain data</li>
	<li>Multi-beam antenna modeling with aggregate calculation</li>
	<li>System-level interference analysis</li>
	<li>4/3 Earth and ITU refraction model</li>
	<li>Spread spectrum support</li>
	<li>Extended modulation types and coding</li>
	<li>Calculator interface for antenna noise temperature</li>
	<li>Interference analysis</li>
</ul>
<p/>
Users can quickly identify when their link will meet desired performance criteria. All typical link parameters may be analyzed 
including frequency, RIP, C/N, C/No, Eb/No, and Bit Error Rate (BER).  Modeling the level of detail users want in their 
communications system can range from simple models like isotropic transmitters and receivers to complex antenna patterns and 
system-temperature modeling. Antennas modeled include:
<p/>
<ul>
	<li>gaussian</li>
	<li>parabolic</li>
	<li>square horn</li>
	<li>non-uniform aperture</li>
	<li>dipole</li>
	<li>helix</li>
	<li>hemispherical</li>
	<li>GPS global beam</li>
	<li>Multi-beam</li>
	<li>importable from ITU and GIMROC database</li>
	<li>user-definable from external files</li>
</ul>
<p/>
Users also have the ability to input custom antenna data, modulation schemes, and transfer functions for use in their link 
analysis in the form of simple ASCII files.  Custom-scripted functions can be created to produce user-defined definitions for 
receivers, transmitters, antennas, and constraints all built from AGI-provided script templates.
<p/>
<div style="float:left;width:370px;">
	<b>Products which support Communications &amp; EW analysis</b>
	<p/>
	<ul style="margin-top:0px;">
		<li><a href="/products/desktopApp/stkFamily/editions/">STK Professional Edition</a></li>
		<li><a href="/products/desktopApp/stkFamily/modules/core/comm/">STK/Communications</a></li>
		<li><a href="/products/desktopApp/stkFamily/modules/integration/stk_integration/">STK/Integration</a></li>
		<li><a href="/products/desktopApp/stkFamily/modules/data/TIM/">STK/Terrain, Imagery, &amp; Maps</a></li>
		<li><a href="/products/desktopApp/stkFamily/modules/core/analyzer/">STK/Analyzer</a></li>
		<li><a href="/products/desktopApp/stkFamily/modules/core/attitude/">STK/Attitude</a></li>
		<li><a href="/products/desktopApp/stkFamily/modules/core/coverage/">STK/Coverage</a></li>
		<li><a href="/products/desktopApp/stkFamily/modules/core/radar/">STK/Radar</a></li>
		<li>STK/NetSim</li>
		<li><a href="/products/desktopApp/stkFamily/modules/extensions/tirem/">TIREM extension for STK/Communications and STK/Radar</a></li>
		<li><a href="/products/desktopApp/stkFamily/modules/extensions/optimizer/">Optimizer extension for STK/Analyzer</a></li>
		<li><a href="/products/desktopApp/stkFamily/modules/extensions/rae/">Radar Advanced Environment extension for STK/Radar</a></li> 
		<li><a href="/products/desktopApp/ntk/">NavTK</a></li>
	</ul>
</div>
<div style="vertical-align:middle;"><a href="/downloads/solutions/Poster.pdf" target="_blank"><img src="/images/redlaf/solutions/agiTechRef.jpg" alt="" border="0" /></a></div>