<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 12pt;
font-family:Calibri
}
--></style></head>
<body class='hmmessage'><div dir='ltr'>Hello everyone,<br><br>I would like to ask information about the implementation of single-frequency PPP in the open-source package RTKLIB.<br><br>As you know, single-frequency PPP is not supported currently in RTKLIB. However, has anyone of you tried to "simulate" this single-frequency PPP data processing in RTKLIB ? <div><br>Let me explain what I did in order to simulate it. I tried to remove the 2nd frequency from my dual-frequency observation data with RTKCONV and then I used IONEX TEC file from IGS in order to "run" the single-frequency PPP. However, it doesn't seem to work that well, due to the fact that when I use the 4 GNSS systems, the solution is worse than GPS-only single-frequency PPP, and I could not explain it.<br><br>I look forward to your proposals. Any idea is welcome.<br><br>Thank you in advance.<br><br>Best regards,<br>Dimitris V. Psychas<br>(psxdimitris@hotmail.com)<br><br><br></div> </div></body>
</html>