1 : z
0024     <span class="comment">% Check for GPS data</span>
0025     <span class="keyword">if</span>  sum(nansum(A(zi).Nav.lat_deg)) == 0
0026         error(<span class="string">'No GPS data detected!'</span>)
0027     <span class="keyword">end</span> 
0028     
0029     <span class="comment">% Prescreen GPS data (Added 4-8-10)</span>
0030     <span class="comment">% Eliminated uncessary &quot;find&quot; statement FLE 12-12-12</span>
0031     bad_long    = A(zi).Nav.long_deg &lt; -180 | A(zi).Nav.long_