For example, in a copy of wxnewpage.php (I called wxradarstatus.php) you can put <div id="main-copy">
<h1><?php langtrans('Status of Nearby Radar Sites'); ?></h1>
<p>Our local site<br/>
<?php include_once("radar-status.php"); ?>
</p>
<p>Sacramento area<br/>
<?php readfile("https://saratoga-weather.org/radar-status.php?nexrad=KDAX&inc=Y&show=active"); ?>
</p>
<p>Hanford area<br/>
<?php readfile("https://saratoga-weather.org/radar-status.php?nexrad=KHNX&inc=Y&show=active"); ?>
</p>
</div><!-- end main-copy -->
to display the three radars.