<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9
                            http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">

  <!--
    GAA Custom Electronics, LLC — sitemap.xml

    Submit once at: Search Console → Sitemaps → https://www.gaacustom.com/sitemap.xml
    Google re-reads it automatically after that; no need to resubmit on edits.

    NOTES ON MAINTENANCE
    - List real pages only. Fragment URLs (/#products, /tools.html#quad-calc)
      are the same page to a crawler and add nothing.
    - <lastmod> is only useful if it is accurate. Update it when a page's
      content actually changes; do not touch it for cosmetic edits. Entries
      whose real date is unknown omit it, which is valid and better than a
      guess Google will learn to distrust.
    - <priority> is a hint about relative importance within this site only.
      It has no effect on ranking against other sites.
    - Add a new <url> block whenever a page is added.
  -->

  <!-- ── HOMEPAGE ─────────────────────────────────────────────────────── -->
  <url>
    <loc>https://www.gaacustom.com/</loc>
    <lastmod>2026-08-09</lastmod>
    <changefreq>monthly</changefreq>
    <priority>1.0</priority>
  </url>

  <!-- ── TOOLS & CALCULATORS ──────────────────────────────────────────── -->
  <url>
    <loc>https://www.gaacustom.com/tools.html</loc>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
  </url>

  <!-- ── PULSE SEQUENCE BUILDER & VISUALIZER ──────────────────────────── -->
  <url>
    <loc>https://www.gaacustom.com/pulse-sequences.html</loc>
    <lastmod>2026-08-09</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
  </url>

  <!-- ── PUBLICATIONS ─────────────────────────────────────────────────── -->
  <url>
    <loc>https://www.gaacustom.com/publications.html</loc>
    <lastmod>2026-08-09</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- ── ION OPTICS COMPONENTS ────────────────────────────────────────── -->
  <url>
    <loc>https://www.gaacustom.com/ion-optics.html</loc>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- ── RESEARCH PROGRAMS ────────────────────────────────────────────── -->
  <url>
    <loc>https://www.gaacustom.com/research.html</loc>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>

  <!-- ── OPEN SOURCE PRACTICE ─────────────────────────────────────────── -->
  <url>
    <loc>https://www.gaacustom.com/open-source.html</loc>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>

  <!--
    ── APPLICATION NOTES (PDF) ───────────────────────────────────────────
    Google indexes PDFs and ranks them for long-tail technical queries.
    These are listed because they are content people search for, not just
    reference material for existing customers. Manuals are deliberately
    left out to keep this focused.
  -->
  <url>
    <loc>https://www.gaacustom.com/docs/appnotes/Pulse_Sequence_Examples.pdf</loc>
    <lastmod>2026-08-09</lastmod>
    <changefreq>yearly</changefreq>
    <priority>0.6</priority>
  </url>
  <url>
    <loc>https://www.gaacustom.com/docs/appnotes/Specifying_Waveforms.pdf</loc>
    <lastmod>2026-08-09</lastmod>
    <changefreq>yearly</changefreq>
    <priority>0.6</priority>
  </url>
  <url>
    <loc>https://www.gaacustom.com/docs/software/Pulse_Sequence_Generation.pdf</loc>
    <lastmod>2026-08-09</lastmod>
    <changefreq>yearly</changefreq>
    <priority>0.6</priority>
  </url>
  <url>
    <loc>https://www.gaacustom.com/docs/appnotes/ESI_Spray_Emitters.pdf</loc>
    <changefreq>yearly</changefreq>
    <priority>0.6</priority>
  </url>

</urlset>
