SensorsのトピックRe: MPL3115A2 Sensor Altitude Accuracy problem https://community.nxp.com/t5/Sensors/MPL3115A2-Sensor-Altitude-Accuracy-problem/m-p/454836#M2434 <HTML><HEAD></HEAD><BODY><P>Hi Mark Pedley,</P><P></P><P>Thank you for your response.</P><P></P><P>If 50 meters change is due to atmospheric changes then how do we bring accuracy in altitude calculation.</P><P></P><P>Regards,</P><P>Kayathri</P></BODY></HTML> Thu, 19 Nov 2015 07:53:22 GMT kayathrim 2015-11-19T07:53:22Z MPL3115A2 Sensor Altitude Accuracy problem https://community.nxp.com/t5/Sensors/MPL3115A2-Sensor-Altitude-Accuracy-problem/m-p/454834#M2432 <HTML><HEAD></HEAD><BODY><P>Hi all,</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>I am testing MPL3115A2 sensor to measure altitude. I can able to read the altitude value. I have monitored the altitude over 24 hours in a same place, height varies from 0 to 50 meter. How to calibrate the accuracy . Altitude keep on varying . I have attached log for reference.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Regards,</P><P>Kayathri</P><P><STRONG>Original Attachment has been moved to: <A _jive_internal="true" href="https://community.nxp.com/docs/DOC-338528" target="_blank">Altitude_sensor.zip</A></STRONG></P></BODY></HTML> Tue, 03 Feb 2026 22:13:20 GMT https://community.nxp.com/t5/Sensors/MPL3115A2-Sensor-Altitude-Accuracy-problem/m-p/454834#M2432 kayathrim 2026-02-03T22:13:20Z Re: MPL3115A2 Sensor Altitude Accuracy problem https://community.nxp.com/t5/Sensors/MPL3115A2-Sensor-Altitude-Accuracy-problem/m-p/454835#M2433 <HTML><HEAD></HEAD><BODY><P>The MPL3115 is a pressure sensor which converts pressure to altitude using a standard atmospheric model. With a "back of the envelope" calculation, 1 atmosphere is about 10,000m so a 50m change is just 0.5% change. You're probably just seeing atmospheric pressure changes.</P></BODY></HTML> Sat, 07 Nov 2015 16:09:05 GMT https://community.nxp.com/t5/Sensors/MPL3115A2-Sensor-Altitude-Accuracy-problem/m-p/454835#M2433 markpedley 2015-11-07T16:09:05Z Re: MPL3115A2 Sensor Altitude Accuracy problem https://community.nxp.com/t5/Sensors/MPL3115A2-Sensor-Altitude-Accuracy-problem/m-p/454836#M2434 <HTML><HEAD></HEAD><BODY><P>Hi Mark Pedley,</P><P></P><P>Thank you for your response.</P><P></P><P>If 50 meters change is due to atmospheric changes then how do we bring accuracy in altitude calculation.</P><P></P><P>Regards,</P><P>Kayathri</P></BODY></HTML> Thu, 19 Nov 2015 07:53:22 GMT https://community.nxp.com/t5/Sensors/MPL3115A2-Sensor-Altitude-Accuracy-problem/m-p/454836#M2434 kayathrim 2015-11-19T07:53:22Z Re: MPL3115A2 Sensor Altitude Accuracy problem https://community.nxp.com/t5/Sensors/MPL3115A2-Sensor-Altitude-Accuracy-problem/m-p/454837#M2435 <HTML><HEAD></HEAD><BODY><P>您好 请问这个问题最后是如何处理的呢？ 我现在遇到一个跟您一样的问题</P><P>我也是用MPL3115A2芯片直接从芯片内寄存器中读取海拔值，在一天当中同一地点的不同时间芯片出的海拔不同</P></BODY></HTML> Fri, 13 Apr 2018 09:04:11 GMT https://community.nxp.com/t5/Sensors/MPL3115A2-Sensor-Altitude-Accuracy-problem/m-p/454837#M2435 王琳娜王 2018-04-13T09:04:11Z