n class="mi">30</span><span class="o">*</span><span class="mi">86400</span>
    <span class="n">t</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">arange</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="n">month_nsec</span><span class="p">,</span> <span class="mi">900</span><span class="p">)</span>
    <span class="n">nsample</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span cla