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<?xml-stylesheet type="text/xsl" href="https://devzone.nordicsemi.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>nRF9151 GNSS issue</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/121238/nrf9151-gnss-issue</link><description>I hope this message finds you well. 
 
 I am currently working on a project using the nRF9151-DK Evaluation Board and have been testing GNSS functionality in various environments with different antennas and configuration settings. However, I am experiencing</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Wed, 07 May 2025 16:09:31 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/121238/nrf9151-gnss-issue" /><item><title>RE: nRF9151 GNSS issue</title><link>https://devzone.nordicsemi.com/thread/534333?ContentTypeID=1</link><pubDate>Wed, 07 May 2025 16:09:31 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:35aee8e1-a738-4db8-83b8-4f3b88f1ed26</guid><dc:creator>Michal</dc:creator><description>&lt;p&gt;Hello Majid,&lt;/p&gt;
[quote user=""]&lt;span style="font-size:150%;"&gt;Whether &lt;span&gt;&lt;b&gt;nRF9151 GNSS supports additional constellations&lt;/b&gt;&lt;/span&gt; such as GLONASS, Galileo, SBAS, BeiDou, or IMES?&lt;/span&gt;[/quote]
&lt;p&gt;If you look into the datasheet, we only specify GPS and QZSS both in the &lt;a href="https://docs.nordicsemi.com/bundle/ps_nrf9151/page/nRF9151_html5_keyfeatures.html"&gt;key features&lt;/a&gt; and &lt;a href="https://docs.nordicsemi.com/bundle/ps_nrf9151/page/gps.html"&gt;GPS receiver&lt;/a&gt; pages.&lt;/p&gt;
[quote user=""]&lt;span style="font-size:150%;"&gt;When both &lt;span&gt;&lt;b&gt;LTE and GNSS&lt;/b&gt;&lt;/span&gt; are enabled, the GNSS receiver does not seem to acquire any satellites, even after waiting for more than an hour. (Tested with or without external antenna)&amp;nbsp;&lt;/span&gt;[/quote]
&lt;p&gt;I don&amp;#39;t know what kind of software you are running, but check out &lt;a href="https://docs.nordicsemi.com/bundle/ncs-latest/page/nrfxlib/nrf_modem/doc/gnss_interface.html#enabling_gnss_priority_mode"&gt;GNSS priority modes&lt;/a&gt;. If LTE is running very often and has a priority than it may interrupt GNSS before getting a fix.&lt;/p&gt;
[quote user=""]&lt;span style="font-size:150%;"&gt;When &lt;span&gt;&lt;b&gt;LTE is disabled&lt;/b&gt;&lt;/span&gt;, a location fix is occasionally received, but only after several minutes and very sporadically.&lt;/span&gt;[/quote]
&lt;p&gt;Is it only for the first fix or every fix takes so much time? You could test out &lt;a href="https://docs.nordicsemi.com/bundle/ncs-latest/page/nrfxlib/nrf_modem/doc/gnss_interface.html#low_accuracy_mode"&gt;low accuracy mode&lt;/a&gt; to see if it gets quicker and if the error in that mode is acceptable.&lt;/p&gt;
&lt;p&gt;Best regards,&lt;/p&gt;
&lt;p&gt;Michal&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>