GPS World, January 2018
WATCH MARKET OEM 2 The v25 release builds further on capabilities made available in 2016 in Android Nougat when the application programming interfaces APIs were introduced and then updated in May 2017 See the API guide Raw GNSS Measurements https developer android com guide topics sensors gnss html In its basic and original form the GNSS Analysis Tool is a desktop program that takes in raw the GNSS Measurements logged from the users Android device as input The desktop application provides interactive plots organized into three columns showing the behavior of the RF clock and measurements The user can see the behavior of the GNSS receiver in great detail including receiver clock offset and drift to the order of 1 nanosecond and 1 ppb and measurement errors on a satellite by satellite basis This enables sophisticated analysis at a level that was previously almost inaccessible to anyone but chip manufacturers The tools support multi constellation GPS GLONASS Galileo BeiDou and QZSS and multi frequency They UPDATES The latest iteration announced Dec 1 includes the following updates Smoothed pseudoranges Plots of positions from raw and smoothed pseudorange Plots of measurement errors for raw and smoothed pseudorange Saves raw and smoothed pseudoranges to derived data file Calculates and saves intersystem time biases to derived data file provide an interactive control screen for manipulating the plots The tools also provide automatic test reports of receivers evaluating the API implementation received signal clock behavior and measurement accuracy In each case it will report PASS or FAIL based on the performance against known good benchmarks ANDROID continued from page 35 JANUARY 2018 WWW GPSWORLD COM GPS WORLD 37
You must have JavaScript enabled to view digital editions.
