GnssLogger App

A handy tool to analyze, visualize and log Android location and sensor data!

GnssLogger by Google enables in-depth analysis and logging of all types of location and sensor data such as GPS (Global Positioning System), network location and other sensor data. It comes with the following features:

HOME TAB:

● Control various data logging such as raw GNSS measurements, GnssStatus, NMEA, navigation messages, sensor data and RINEX logs.

LOG TAB:

● View all location and raw measurement data.

● Control offline logging using 'Start Log', 'Stop & Send' and 'Timed Log'.

● Enable specific items to be logged using corresponding switches in Home Tab.

● Delete existing log files from disk.

MAP TAB:

● Visualize on GoogleMap, the location provided by GPS chipset, Network Location Provider (NLP), Fused Location Provider (FLP), and computed Weighted Least Square (WLS) position.

● Toggle between different map views and location types.

PLOTS TAB:

● Visualize CN0 (Signal Strength), PR (pseudorange) Residual and PRR (pseudorange rate) Residual vs time.

STATUS TAB:

● View detailed information of all visible GNSS (Global Navigation Satellite System) satellites such as GPS, Beidou (BDS), QZSS, GAL (Galileo), GLO (GLONASS) and IRNSS.

SKYPLOT TAB:

● Visualize the data of all visible GNSS satellites using a skyplot.

● View the average CN0 of all the satellites in view and the ones used in fix.

AGNSS TAB:

● Experiment with Assisted-GNSS functionalities.

WLS Analysis TAB:

● View the Weighted Least Square position, velocity and their uncertainties computed based on raw GNSS measurements.

● Compare the WLS results to the GNSS chipset reported values.