<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31317554</termId><termName>synthetic aperture radar</termName><termType>PT</termType><termNote><![CDATA[ A radar system that uses the motion of the vehicle (such as a spacecraft) carrying it to simulate a system having a much larger antenna area and that is used to obtain high-resolution images of a surface (as of a planet). It requires that the radar be moving in a straight line, either on an airplane or orbiting in space. ]]></termNote><termCreatedDate>2026-03-30 20:25:30</termCreatedDate><relation><relationType>BT</relationType><termId>31304585</termId><termName>radar</termName><termType>PT</termType></relation></term>  </Zthes>