+<h2 id="_protecting_micropeak_from_sunlight">3. Protecting MicroPeak from Sunlight</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>The MS5607 barometric sensor is sensitive to direct light. When light
+shines through the holes in the cover to the components inside, the
+reported pressure can vary wildly from the actual pressure. This
+causes the reported altitude to have errors of thousands of
+feet.</p>
+</div>
+<div class="paragraph">
+<p>MicroPeak should be installed in an opaque compartment in the airframe
+and not subjected to sunlight. Alternatively, a small piece of
+adhesive-backed open-cell foam can be attached to the device so that
+it covers the barometric sensor and protects it from direct light.</p>
+</div>
+<div class="paragraph">
+<p>Here’s what happens when MicroPeak is exposed to sunlight. At apogee,
+I exposed MicroPeak to varying amounts of sunlight and you can see the
+wild swings in altitude resulting from that:</p>
+</div>
+<div class="imageblock">
+<div class="content">
+<img src="micropeak-flight-nofoam.png" alt="micropeak flight nofoam" width="430">
+</div>
+<div class="title">Figure 13. MicroPeak in Sunlight</div>
+</div>
+<div class="paragraph">
+<p>You can carefully cutting a piece of adhesive-backed open-cell foam
+and attach it to MicroPeak. It’s important to press the adhesive to
+the circuit board and not to the top of the barometric sensor or the
+sensor may become blocked and not operate at all. Once you’ve attached
+the foam, you should test MicroPeak on the ground to make sure it’s
+still working.</p>
+</div>
+<div class="imageblock">
+<div class="content">
+<img src="micropeak-foam.jpg" alt="micropeak foam" width="430">
+</div>
+<div class="title">Figure 14. MicroPeak with Foam</div>
+</div>
+<div class="paragraph">
+<p>That MicroPeak was in the same barometric chamber as the one which
+generated the above results and the resulting flight data looks
+correct:</p>
+</div>
+<div class="imageblock">
+<div class="content">
+<img src="micropeak-flight-foam.png" alt="micropeak flight foam" width="430">
+</div>
+<div class="title">Figure 15. MicroPeak in Sunlight with Foam</div>
+</div>
+</div>
+</div>
+<div class="sect1">