General Blog

Tools for convert your NMEA file to GPX file

Posted by shaojie wu on

GPSBabel -This utility can transfer your NMEA file to GPX file or other formats. It has Windows, Mac & Linux versions. Please go to http://www.gpsbabel.org for free download.

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Why sometimes GPS loggers / GPS receivers have less battery run time?

Posted by jack wu on

Why sometimes GPS loggers / GPS receivers have less battery run time?

GPS has longer battery runtime under optimum environment. For those non optimum environments, (For example. when keep trying a position fix, seeking Bluetooth Connection, or under an unstable environment – bad weather, forest, buildings.) GPS would need more calculation and power consumption. So that battery runtime is less than the one in optimum condition.

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If your GPS Receiver / Logger getting the position fix not as far as below, what you should do?

Posted by jack wu on

If your GPS Receiver / Logger getting the position fix not as far as below, what you should do?

I will suggest reset or cold restart the GPS, which will rest the GPS registers/cache. When the GPS start up again, the GPS will redo the calculation and update the registers/cache.

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More GPS / GNSS channels, better accuracy.

Posted by jack wu on

More GPS / GNSS channels, better accuracy.

General speaking, we need 1 channel per GPS satellite. There are only 30 satellites in the system & why we need so many channels in the GPS receiver/logger? According to GPS algorithm, bigger number of satellites a GPS tracks at a time, better accuracy the GPS can calculate. In a period of time, some GPS satellites disappear from horizon & GPS  receiver lost connection from them. Meanwhile, some other GPS satellites appear. If the GPS is not able to “capture” those newly available satellites fast enough, the number of satellites track by the GPS is reduced. Hence the accuracy will...

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