|
Server : Apache/2.4.62 System : FreeBSD fbsdweb2.web.rcn.net 14.1-RELEASE FreeBSD 14.1-RELEASE releng/14.1-n267679-10e31f0946d8 GENERIC amd64 User : www ( 80) PHP Version : 8.3.8 Disable Function : NONE Directory : /domains/highlandlabs/cqi-bin/ALFA_DATA/alfasymlink/root/domains/remotesensing/products/ |
Upload File : |
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<!-- adapted from a Design by: <a href="http://businesswebsitetemplates.blogspot.com"title="free templates">FREE BUSINESS TEMPLATES</a> -->
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta name="keywords" content="GPS, GNSS, Software, Hardware, Research and Development, R&D, Navigation, Signal Simulator, Signal Generator, Receiver, Simulator, Emulator, Transceiver, Front End, RF, Impulse, Real Time, SigSim, Data Acquisition, Galileo, Glonass, UTC, Ultra Tightly Coupled, INS, Ionospheric Receiver, Pseudolite, Radar, Software Radar, Radio, Software Radio, HF Diagnostics, Microwave Rain Gauge, Data Logger, EM Sensor, Jammer, Antenna, FPGA, DSP, High Performance Board, Suman Ganguly, Virginia, Fairfax, SBIR, Small Business, Engineering, Electromagnetics, Signal Processing, Space Weather, Instrumentation, Electronics, Analyzers, Surveillance, Computer Systems, Image Processing, Material Science, Microwave, Electrical Engineering, Electronics Engineering, Upconverter, Downconverter, LNA, L1, L2, L5, C/A, P-Code, Encryption, Ionospheric Sounder, Sounder, spoofer, EW, electronic warfare, C3I, Signal Analyzer, Signal Processor, ST Radar, MST Radar, IST Radar, SAR, GPS Receivers, GNSS Receivers, GPS Simulators, GNSS Simulator, Rain Radar, Ultra Wide Band Radar, Ground Penetrating Radar, HF Radar, Ionosonde, HF Diagnostic, OTH Radar, Satellite Simulator, Communication Simulator, Channel Simulator, Radar Simulator, Attitude Determination, Anti-Jam Receiver"/>
<title>CRS | Products & Services | GPS and Navigation Products | Multifrequency Real-Time GPS & GNSS Receivers</title>
<link href="style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="wrapper">
<div id="header">
<div id="logo">
<img src="images/crslogo.png" class="floatTL" alt="business" /><br><br><br><br><br>
<div id="nav">
<!-- Css Menu -->
<style>
ul.cssMenu ul{display:none}
ul.cssMenu li:hover>ul{display:block}
ul.cssMenu ul{position: absolute;left:-1px;top:98%;}
ul.cssMenu ul ul{position: absolute;left:98%;top:-2px;}
ul.cssMenu,ul.cssMenu ul {
margin:0px;
list-style:none;
padding:0px 1px 1px 0px;
background-color:#13264d;
background-repeat:repeat;
border-color:#A6A6A6;
border-width:0px;
border-style:solid;
}
ul.cssMenu table {border-collapse:collapse}ul.cssMenu {
display:block;
zoom:1;
float: right;
}
ul.cssMenu ul{
width:197.4px;
}
ul.cssMenu li{
display:block;
margin:1px 0px 0px 1px;
font-size:0px;
}
ul.cssMenu a:active, ul.cssMenu a:focus {
outline-style:none;
}
ul.cssMenu a, ul.cssMenu li.dis a:hover, ul.cssMenu li.sep a:hover {
display:block;
vertical-align:middle;
background-color:#13264d;
border-width:0px;
border-color:#FCEEB0;
border-style:solid;
text-align:left;
text-decoration:none;
padding:5px;
_padding-left:0;
font:12px Arial;
color: #ffffff;
text-decoration:none;
cursor:pointer;
}
ul.cssMenu span{
overflow:hidden;
}
ul.cssMenu li {
float:left;
}
ul.cssMenu ul li {
float:none;
}
ul.cssMenu ul a {
text-align:left;
white-space:nowrap;
}
ul.cssMenu li.sep{
text-align:left;
padding:0px;
line-height:0;
height:100%;
}
ul.cssMenu li.sep span{
float:none; padding-right:0;
width:3;
height:100%;
display:inline-block;
background-color:#A6A6A6; background-image:none;}
ul.cssMenu ul li.sep span{
width:100%;
height:3;
}
ul.cssMenu li:hover{
position:relative;
}
ul.cssMenu li:hover>a{
background-color:#93AEE6;
border-color:#4C99AB;
border-style:solid;
font:12px Arial;
color: #FFFFFF;
text-decoration:none;
}
ul.cssMenu li a:hover{
position:relative;
background-color:#93AEE6;
border-color:#4C99AB;
border-style:solid;
font:12px Arial;
color: #FFFFFF;
text-decoration:none;
}
ul.cssMenu li.dis a {
color: #AAAAAA !important;
}
ul.cssMenu img {border: none;float:left;_float:none;margin-right:5px;width:16px;
height:16px;
}
ul.cssMenu ul img {width:16px;
height:16px;
}
ul.cssMenu img.over{display:none}
ul.cssMenu li.dis a:hover img.over{display:none !important}
ul.cssMenu li.dis a:hover img.def {display:inline !important}
ul.cssMenu li:hover > a img.def {display:none}
ul.cssMenu li:hover > a img.over {display:inline}
ul.cssMenu a:hover img.over,ul.cssMenu a:hover ul img.def,ul.cssMenu a:hover a:hover img.over{display:inline}
ul.cssMenu a:hover img.def,ul.cssMenu a:hover ul img.over,ul.cssMenu a:hover a:hover img.def{display:none}
ul.cssMenu a:hover ul{display:block}
ul.cssMenu span{
display:block;
background-image:url(./images/arrv_blue_2.gif);
background-position:right center;
background-repeat: no-repeat;
padding-right:8px;}
ul.cssMenu li:hover>a>span{ background-image:url(./images/arrv_white_2.gif);
}
ul.cssMenu a:hover span{ _background-image:url(./images/arrv_white_2.gif)}
ul.cssMenu ul span,ul.cssMenu a:hover table span{background-image:url(./images/arr_blue_2.gif)}
ul.cssMenu ul li:hover > a span{ background-image:url(./images/arr_white_2.gif);}
ul.cssMenu table a:hover span{background-image:url(./images/arr_white_2.gif)}
ul.cssMenu li a.cssMenui0{
font:n;
}
ul.cssMenu li a.cssMenui0:hover{
font:o;
}
</style>
<ul class="cssMenu cssMenum">
<li class=" cssMenui0"><a class=" cssMenui0" href="../index.html">Home</a></li>
<li class=" cssMenui0"><a class=" cssMenui0" href="products.html"><span>Products & Services</span><![if gt IE 6]></a><![endif]><!--[if lte IE 6]><table><tr><td><![endif]-->
<ul class=" cssMenum">
<li class=" cssMenui"><a class=" cssMenui" href="gps.html">GPS & Navigation Systems</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="radio.html">Radio and Radar Systems</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="signal.html">Signal Processing & Analyzers</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="antenna.html">E.M. Sensors & Antenna Types</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="space.html">Space Weather Systems</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="instru.html">Instrumentation</a></li>
</ul>
<!--[if lte IE 6]></td></tr></table></a><![endif]--></li>
<li class=" cssMenui0"><a class=" cssMenui0" href="../research/research.html"><span>Research & Development</span><![if gt IE 6]></a><![endif]><!--[if lte IE 6]><table><tr><td><![endif]-->
<ul class=" cssMenum">
<li class=" cssMenui"><a class=" cssMenui" href="../research/navigation.html">Advanced Navigation Systems</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/radio.html">Radio & Radar Engineering</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/em.html">Electromagnetics</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/signal.html">Signal & Image Processing</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/surv.html">Surveillance</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/physics.html">Space Weather & Physics</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/comp.html">Computer Systems & Software</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/ee.html">Electrical Engineering</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/science.html">Microwave/Material Science</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/instru.html">Instrumentation</a></li>
</ul>
<!--[if lte IE 6]></td></tr></table></a><![endif]--></li>
<li class=" cssMenui0"><a class=" cssMenui0" href="../publications/public.html"><span>Publications</span><![if gt IE 6]></a><![endif]><!--[if lte IE 6]><table><tr><td><![endif]-->
<ul class=" cssMenum">
<li class=" cssMenui"><a class=" cssMenui" href="../publications/journals.html">Journals</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../publications/conf.html">Conference Proceedings</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../publications/reports.html">Reports & Patents</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../publications/press.html">Press Releases</a></li>
</ul>
<!--[if lte IE 6]></td></tr></table></a><![endif]--></li>
<li class=" cssMenui0"><a class=" cssMenui0" href="../profile/pro.html"><span>About Us</span><![if gt IE 6]></a><![endif]><!--[if lte IE 6]><table><tr><td><![endif]-->
<ul class=" cssMenum">
<li class=" cssMenui"><a class=" cssMenui" href="../profile/pro.html">Profile</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../profile/bckgd.html">Background</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../profile/mission.html">Mission</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../profile/capabilities.html">Capabilities</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../profile/personnel.html">Personnel</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../profile/accom.html">Accomplishments</a></li>
<!--<li class=" cssMenui"><a class=" cssMenui" href="../profile/career.html">Careers</a></li>-->
<li class=" cssMenui"><a class=" cssMenui" href="../profile/contact.html">Contact Us</a></li>
</ul>
<!--[if lte IE 6]></td></tr></table></a><![endif]--></li>
<li class=" cssMenui0"><a class=" cssMenui0" href="brochures.html">Brochures</a></li>
</ul>
<br> </div>
<div id="bg">
</div>
<div id="main">
<div id="leftcolumn">
<div id="logo">
<h1>GPS and Navigation Products</h1>
<h2>Multifrequency Real-Time GPS and GNSS Receivers</h2>
<div class="blockquote">
<div class="box">
<h3>Products covered in this section:</h3>
<ul>
<li> <a href="../pdf/Advanced Dual Frequency GPS Receiver.pdf"><b>Advanced Dual Frequency GPS Receiver</b></a></li>
<li> <a href="gpsrxiono.html">Ionospheric Monitoring Receiver with Calibrator</a></li>
<li> <a href="gpsrxutc.html">Ultra Tightly Coupled Monitoring Receiver with Calibrator</a></li></ul>
</div></div><br>
<p>CRS has pioneered "software radio technology" for more than 15 years. We have developed and commercialized the world's first real-time software based GPS receivers. Our software GPS receivers have made direct use of software radio technology. These receivers proved to have superior performance and flexibility within modest costs. The technology for the development of such receivers is described <a href="gpssystem.html">here</a>. The technology allows us to design and develop new architecture within a few months.
<br><br>
Several GPS receivers for specialized applications have been developed. (see <a href="../research/navigation.html">Research & Development</a>). These include block processing receivers, multipath mitigation, A/J receivers, precise test and position localization receivers, YMCA receivers, GPS/INS integrated systems, Direct Y-code acquisition, and pseudolites. Satellite-borne dual frequency receivers have also been developed.
<br><br>
These specialized receivers provide extreme accuracy and access to many intermediate parameters not normally available. They also provide flexibility and can be upgraded as the new waveforms and signals become available.
<br><br>
Prototypes of these receivers are available. We are constantly upgrading the receivers as new waveforms and signals are being defined. These include GPS-III waveforms, L5, as well as those for Galileo. Civilian Glonass receivers are developed and combined GPS/Glonass receivers will soon be available as a commercial off-the-shelf product.
<br><br>
<a href="../pdf/Advanced Dual Frequency GPS Receiver.pdf"><b>Advanced Dual Frequency GPS Receiver</b></a> is the software based real-time GPS receiver introduced in 2000. The receiver uses semi-codeless P code and provides extremely precise pseudoranges, phases, and navigational solutions at a rate up to 50 updates/sec.
<br><br>An expanded version of this receiver with a built in calibrator has been widely used by ionospheric researchers for <a href="gpsrxiono.html">precise monitoring of ionosphere</a>. The calibrator ensures that receiver bias is deterministically measured and eliminated. This provides sound measurement of absolute TEC, which is not available by using any other receivers. The receiver also provides independent L1, L2 amplitude and phase time series and spectra in real time.
<br><br>
<a href="gpsrxutc.html">Ultra-Tightly Coupled GPS/INS Receiver</a> is based on our software receiver technology and is integrated with inexpensive MEMS-based Inertial Measuring Unit (IMU), closely within the GPS tracking loop. This novel architecture provides cm-level accuracy using civilian signals. The integration scheme allows the tracking loop bandwidth to be reduced (the dynamics is handled by the INS), thereby improving the SNR. It can also handle signal obscuration for limited durations.
</p>
</div></div>
<div id="rightcolumn">
<div class="blockquote">
<div class="box">
<h2>GPS and Navigation Products</h2>
<ul>
<li> <a href="gpssystem.html">Navigational System Design & Development Products</a></li>
<li> <a href="gpssim.html">Navigational Signal Simulators</a></li>
<li> <b>Multi-Frequency GPS and GNSS Receivers</b></li>
<li> <a href="gpspseudolite.html">Pseudolites</a></li>
<li> <a href="gpsantenna.html">GPS/GNSS Antennas</a></li>
<li> <a href="gpsnavwar.html">NAVWAR</a></li>
</ul></div></div><br>
</div>
</div>
<div id="footer"><p>Copyright © 2010 | <a href="../profile/mission.html">mission</a> | <a href="../profile/contact.html">contact us</a> | <!--<a href="../profile/careers.html">careers</a> | --><a href="../sitemap.html">site map</a> | <a href="../search.html">search</a></p></div>
</div>
</body>
</html>