n">hbincenters</span> <span class="o">-</span> <span class="n">dtL</span><span class="o">/</span><span class="mi">2</span>
        <span class="n">dU</span> <span class="o">=</span> <span class="n">hbincenters</span> <span class="o">+</span> <span class="n">dtU</span><span class="o">/</span><span class="mi">2</span>
        <span class="n">dt</span> <span class="o">=</span> <span class="p">(</span><span class="n">dU</span><span class="o">-</span><span class="n">dL</span><span class="p">)</span>
        <spa