<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body><section><h1>概要</h1><figure class="short list"><figcaption><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="2" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[2]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">GNSS</anchor></figcaption><ul><li><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">GPS</anchor></li><li><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">GLONASS</anchor></li><li><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Galileo</anchor></li><li><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">BDS</anchor></li><li><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">みちびき</anchor></li><li><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">NavIC</anchor></li><li><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">DORIS</anchor></li></ul></figure><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="1" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[1]</anchor-end> (<time>2023-04-13T14:33:56.000Z</time>, <time>2023-04-24T02:20:20.675Z</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://www.gsi.go.jp/common/000197676.pdf">https://www.gsi.go.jp/common/000197676.pdf</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="3" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[3]</anchor-end> <cite xml:lang="ja">GNSS測位とは | 国土地理院</cite>
(<time>2023-04-24T02:21:28.000Z</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://www.gsi.go.jp/denshi/denshi_aboutGNSS.html">https://www.gsi.go.jp/denshi/denshi_aboutGNSS.html</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="4" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[4]</anchor-end> <cite xml:lang="ja">衛星測位システム - Wikipedia</cite>
(<time>2023-04-10T00:49:46.000Z</time>, <time>2023-04-24T02:23:05.536Z</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://ja.wikipedia.org/wiki/%E8%A1%9B%E6%98%9F%E6%B8%AC%E4%BD%8D%E3%82%B7%E3%82%B9%E3%83%86%E3%83%A0">https://ja.wikipedia.org/wiki/%E8%A1%9B%E6%98%9F%E6%B8%AC%E4%BD%8D%E3%82%B7%E3%82%B9%E3%83%86%E3%83%A0</anchor-external></p></section><section><h1>GNSS 時刻</h1><figure class="short list"><figcaption><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="6" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[6]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">GNSS</anchor> における<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">日時</anchor></figcaption><ul><li><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">GPS時刻</anchor></li><li><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">GLONASST</anchor></li><li><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Galileo System Time</anchor></li><li><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">BeiDou Time</anchor></li><li><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">QZSST</anchor></li></ul></figure><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="11" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[11]</anchor-end> 
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">GLONASS時刻</anchor>以外は<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">週秒系</anchor>。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="5" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[5]</anchor-end> <cite xml:lang="en">Time References in GNSS - Navipedia</cite>, <time>2020-11-04T13:38:01.000Z</time>, <time>2023-04-24T02:28:00.535Z</time> <anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://gssc.esa.int/navipedia/index.php/Time_References_in_GNSS">https://gssc.esa.int/navipedia/index.php/Time_References_in_GNSS</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="7" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[7]</anchor-end> <cite>000070971.pdf</cite>, <time>2023-04-13T13:58:52.000Z</time>, <time>2023-04-24T03:14:55.340Z</time> <anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://www.gsi.go.jp/common/000070971.pdf">https://www.gsi.go.jp/common/000070971.pdf</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="8" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[8]</anchor-end> <cite xml:lang="ja">FAQ詳細 秋月電子通商-電子部品・ネット通販</cite>, <time>2023-04-24T03:54:04.000Z</time> <anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://akizukidenshi.com/catalog/faq/goodsfaq.aspx?goods=M-14541">https://akizukidenshi.com/catalog/faq/goodsfaq.aspx?goods=M-14541</anchor-external></p><blockquote><p>はい、対応しています。u-blox M8エンジンのファームウェアでは、リファレンス週番号としてデフォルト値[ 1867 ](2015年)が設定されていて、2019年のロールオーバーに対応しています。この週番号は、ユーザーが定義することもできます。</p></blockquote><blockquote><p>またM8エンジン内で受信中の他測位衛星システムの日付情報を活用してGPSシステムのロールオーバー問題を回避します。GLONASSは2124年、Galileoは2078年、BeiDouは2163年まで、日付情報の正確性が確保されています。</p></blockquote><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="9" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[9]</anchor-end> <cite>ZED-F9P Integration manual - ZED-F9P_IntegrationManual_UBX-18010802.pdf</cite>, <time>2022-05-03T09:33:28.000Z</time>, <time>2023-04-24T03:57:20.231Z</time> <anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://content.u-blox.com/sites/default/files/ZED-F9P_IntegrationManual_UBX-18010802.pdf#page=63">https://content.u-blox.com/sites/default/files/ZED-F9P_IntegrationManual_UBX-18010802.pdf#page=63</anchor-external></p><blockquote><sw-left xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><p xmlns="http://www.w3.org/1999/xhtml">Fortunately, although BeiDou and Galileo have similar representations of time, they transmit
sufficient bits for the week number to be unambiguous for the foreseeable future (the first
ambiguity will be in 2078 for Galileo and not until 2163 for BeiDou). GLONASS has a different
structure, based on a time of day, but again transmits sufficient information to avoid any ambiguity
during the expected lifetime of the system (the first ambiguous date will be in 2124). Therefore, u-
blox 9 receivers using Protocol Version 24 and above regard the date information transmitted by
GLONASS, BeiDou and Galileo to be unambiguous and, where necessary, use this to resolve any
ambiguity in the GPS date.</p></sw-left></blockquote><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="10" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[10]</anchor-end> <cite>3GPP TS 36.355 - 36355-c50.pdf</cite>, <time>2021-09-29T18:15:42.000Z</time>, <time>2023-04-24T03:59:12.201Z</time> <anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://www.arib.or.jp/english/html/overview/doc/STD-T104v4_30/5_Appendix/Rel12/36/36355-c50.pdf#page=53">https://www.arib.or.jp/english/html/overview/doc/STD-T104v4_30/5_Appendix/Rel12/36/36355-c50.pdf#page=53</anchor-external></p></section><section><h1>メモ</h1></section></body></html>