ÿþ<!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> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv="Content-Language" content="zh-CN" /> <meta content="all" name="robots" /> <meta name="Copyright" content="ANTESKY SCIENCE TECHNOLOGY INC." /> <meta name="description" content="This article mainly summarizes general procedure and access network preparation of satellite communication earth station antenna entering international satellite network. " /> <meta content="7.3m earth station antenna, earth station antenna access, satellite communication antenna, satellite antenna access, antenna site" name="keywords" /> <title>7.3M earth station antenna access preparation|Earch Station Antenna,Rx antenna</title> <link href="/css/style01.css" rel="stylesheet" type="text/css" /> <script language="JavaScript" > function checkforms() { var key key=document.formSearchs.key.value if (key==null || key=="" ) { aler("Please enter your search keywordsÿ"); document.formSearchs.key.focus(); return(false); } } </script> </head> <body> <div id='top'> <div class='logo'><img src='/images/logo.gif' alt='antesky science technology' width='143' height='53' /></div> <div class='companyname'><img src='/images/name.jpg' alt='ANTESKY SCIENCE TECHNOLOGY INC.' width='414' height='17' /></div> <div class='clearit'></div> <div class='nav'> <ul> <li class='nav01'><a href='/index.asp'>Home</a></li><li class='nav02'><a href='/Earth-Station-Antenna.html'>Products</a></li> <li class='nav03'><a href='/dps.asp'>Designs and Processing Support</a></li><li class='nav04'><a href='/solutions.asp'>Solutions</a></li><li class='nav05'><a href='/sas.asp'>Support and Service</a></li><li class='nav04'><a href='/design.asp'>Articles</a></li> <li class='nav06'><a href='/contactus.asp'>Contact us</a></li> </ul> </div> <div class='navxj'><a href='/Earth-Station-Antenna.html'>Earth Station Antenna</a><span class='xx'>|</span> <a href='/Rx-Antenna.html'>Rx Antenna</a><span class='xx'>|</span> <a href='/SNG-Antenna.html'>SNG Antenna</a><span class='xx'>|</span> <a href='/Flyaway-Antenna.html'>Flyaway Antenna</a><span class='xx'>|</span> <a href='/Antenna-Control-System.html'>Antenna Control System</a><span class='xx'>|</span><a href='/Antenna-Tracking-System.html'>Antenna Tracking System</a></div> <div class="cpbanner"></div> <div id="main"><div id="left"> <div class="ydnav02"><a href="/news.asp"> news</a> &gt;&gt; 7.3M earth station antenna access preparation</div> <div class="ydnav02b"><table border="0" cellpadding="0" cellspacing="0"> <form action="/search.asp" method="get" name="formSearchs" id="formSearchs" onSubmit="return checkforms()"> <tr> <td width="30"><img src="/images/search01.jpg" /></td> <td width="130"><input name="key" type="text" class="znsearch" id="key" size="18" maxlength="50" /></td> <td height="25" ><input name="submit" type="image" id="submit" src="/images/search.jpg" /> </td> </tr> </form></table></div> <div class="clearit"> <table width="98%" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="30" align="center" class="titled">7.3M earth station antenna access preparation</td> </tr> <tr> <td class="xhx01">&nbsp;</td><tr> <td align="center">Date:2011-07-19 14:51&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Hits:<script language="javascript" src="../hits.asp?id=225"></script></td> </tr> </tr> <tr></tr> </table> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="10"></td> </tr> </table> <table width="98%" border="0" cellspacing="0" cellpadding="0"> <tr> <td>&nbsp;</td> </tr> </table> <table width="98%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="xwhj"><DIV>1 Access network preparation </DIV><br><DIV>Firstly, the earth station antenna user should propose the application for Intelsat. Access network earth station user will be informed a week earlier after Intelsat approves and sets access network time and satellite apply, in order that users of access network earth station have enough time to prepare. Thus access network is not in a hurry and unsuccessful so that it doesnt waste time and opportunity. Before earth station antenna enters Intelsat net, all sorts of factors including station site selection, antenna polarization adjustment and antenna rotation speed, etc. should be taken into consideration.&nbsp; </DIV><br><DIV>1.1 Station site selection</DIV><br><DIV>The selection of earth station antenna site should be done before antenna installation. It will be likely to have an affect on access network if access network need is not considered. Station site selection usually should comprehensively consider and balance the following factors: I. Geographic condition of station site. II. Interference situation of same frequency and adjacent frequency. III. Condition of climate and environment. IV. Power supply. And geographic condition has great affect on antenna access network measurement. Earth station antenna should possess field of view as large as possible. Generally earth station antenna at least should have protective angle of above 10 degrees in azimuth and elevation. Besides, know whether there are frequency interference of microwave station, radar station and radio station around station site in order to take corresponding measures.</DIV><br><DIV>1.2 Adjustment of earth station antenna </DIV><br><DIV>The adjustment of earth station satellite communication antenna mainly refers to adjustment of antenna azimuth, elevation, feed focal distance and polarization converter. The formula for calculating theoretical value of antenna azimuth and elevation is as follows: </DIV><br><DIV>Az =180+arctg [ ]&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </DIV><br><DIV>El = arctg [ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </DIV><br><DIV>&nbsp;</DIV><br><DIV>&nbsp; In the formula, &nbsp;is east longitude of on-orbit satellite, &nbsp;is east longitude where earth station antenna is located. &nbsp;is north latitude where earth station antenna is located, R is earth radius(6378km), H is vertical height(35786km) from satellite to the ground. &nbsp;</DIV><br><DIV>&nbsp;&nbsp;Azimuth designates due north as 0 and elevation designates the elevation angle when antenna axis reaches horizontal position (relative to the ground) as &nbsp;0. Generally International satellite has three beacons with frequency of 3947.5MHz, 3950MHz and 3952.5MHz respectively which can make antenna roughly pointing to satellite according to theoretical value. Using satellite beacon signal and applying spectrum analyzer make antenna accurately pointing to satellite.</DIV><br><DIV>&nbsp; After antenna pointing to the satellite accurately, measure antenna rotation speed of the azimuth and elevation because it is required by CSM (collaboration earth station designated by Intelsat) in direction diagram of the access process. The requirement for entering international network is that the rotation speed of earth station antenna is about 0.02 deg/s. </DIV><br><DIV><B>About Antesky</B></DIV><br><DIV><A href="http://www.antesky.com/">Antesky Science Technology Inc.&nbsp;</A>is specially engaged in designing, manufacturing and installing satellite communication antennas and relevant servo equipments. We can offer a complete line of earth station antenna products and systems, such as&nbsp;<A href="http://www.antesky.com/Earth-Station-Antenna.html">Satellite communication antennas</A>,&nbsp;<A href="http://www.antesky.com/Earth-Station-Antenna.html">Earth Station Antenna</A>,&nbsp;<A href="http://www.antesky.com/Earth-Station-Antenna.html">Vsat antenna</A>,TV&nbsp;<A href="http://www.antesky.com/Rx-Antenna.html">receive only antennas</A>, satellite news gathering Antennas,&nbsp;<A href="http://www.antesky.com/Flyaway-Antenna.html">Flyaway antenna</A>,&nbsp;<A href="http://www.antesky.com/Antenna-Control-System.html">control system</A>&nbsp;and&nbsp;<A href="http://www.antesky.com/Antenna-Tracking-System.html">tracking system</A>.</DIV><br><DIV>&nbsp;</DIV><br><DIV>Any more information please visit <A href="http://www.antesky.com/">http://www.antesky.com</A> or send email to <A href="mailto:sales@antesky.com">sales@antesky.com</A>. </DIV></td> </tr> </table> <table width="98%" border="0" cellspacing="0" cellpadding="0"> <tr> <td>&nbsp;</td> </tr> </table> <table width="98%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="xhx01">&nbsp;</td> </tr> </table><table width='98%' border='0' cellspacing='0' cellpadding='0'><tr><td class='navlb' align='left'>Related Articles</td></tr></table><div class='xginfo'><ul><li><a href='Maintenances-of-Earth-Station-Antenna.html' >The Maintenances of Earth Station Antenna from Antesky</a></li><li><a href='Earth-Station-Antenna-Control-System.html' >Maintenance and Protection for Satellite Earth Station Ante...</a></li><li><a href='4.5m-Earth-Station-Antennas.html' >Antesky Introduces 4.5m Earth Station Antenna With High Qua...</a></li><li><a href='7.3m-Earth-Station-Antennas.html' >Antesky Introduces 7.3m Earth Station Antenna With Self-ali...</a></li><li><a href='Satellite-Antenna-Systems.html' >Antesky Satellite Antenna Systems and Service</a></li><li><a href='9.0m-Earth-Station-Antennas.html' >Antesky Introduces 9.0 meter Dual-Reflector Earth Station A...</a></li> </ul> </div><table width="98%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="xhx01">&nbsp;</td> </tr> </table><table width='98%' border='0' cellspacing='0' cellpadding='0'><tr><td class='navlb' align='left'>Main Products</td></tr></table><div class='xgcp'><table><tr><td align='left' style='padding-left:5px;'><a href='/products/1.8m-Flyaway-antenna.html' ><img src='/uploadfiles/201121146857921.jpg' width='160' height='133' class='imgb02' /></a><br/><a href='/products/1.8m-Flyaway-antenna.html' class='ptext02'>1.8M Flyaway Antenna (C band)</a></td><td align='left' style='padding-left:5px;'><a href='/products/4.3m-Rx-antenna.html' ><img src='/uploadfiles/2010112462701517.jpg' width='160' height='133' class='imgb02' /></a><br/><a href='/products/4.3m-Rx-antenna.html' class='ptext02'>4.3M Rx Antenna</a></td><td align='left' style='padding-left:5px;'><a href='/products/4.5m-earth-station-antenna.html' ><img src='/uploadfiles/2010112980129753.jpg' width='160' height='133' class='imgb02' /></a><br/><a href='/products/4.5m-earth-station-antenna.html' class='ptext02'>4.5M VSAT Antenna</a></td><td align='left' style='padding-left:5px;'><a href='/products/6.2m-earth-station-antenna.html' ><img src='/uploadfiles/2010112455329609.jpg' width='160' height='133' class='imgb02' /></a><br/><a href='/products/6.2m-earth-station-antenna.html' class='ptext02'>6.2M Earth Station Antenna</a></td></tr></table></div></div></div> <div id="right"><div class='rightnav'> <table width='100%' border='0' cellspacing='0' cellpadding='0'> <tr><td align='left'>Products</td></tr> </table></div><div class='rightcp'><ul><li ><a href='/Earth-Station-Antenna.html'>Earth Station Antenna</a></li><li ><a href='/SNG-Antenna.html'>SNG Antenna</a></li><li ><a href='/Flyaway-Antenna.html'>Flyaway Antenna</a></li><li ><a href='/Rx-Antenna.html'>Rx Antenna</a></li><li ><a href='/Antenna-Control-System.html'>Antenna Control System</a></li><li ><a href='/Antenna-Tracking-System.html'>Antenna Tracking System</a></li></ul></div><div class='rightnav'> <table width='100%' border='0' cellspacing='0' cellpadding='0'> <tr><td align='left'>Related Articles</td></tr> </table></div><div class='rightnews02'><ul><li class='fgbg'><a href='/article/How-to-Site-VSAT-Antenna-Rx-Tx-antenna.html'>How to Site VSAT Antenna - 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