Just received my ZUBAX GNSS 2 module recently.
Here is the results of a quick test of pressure and temperature readings from Zubax vs BMP280 sensor (https://www.adafruit.com/product/2651).
Two modules were set up side by side in a room and run simultaneously for several hours.
Data is collected at one second intervals using Raspbery Pi 2 and a code written in python.
Zubax module is connected via USB.
BMP280 module is connected via SPI.
product_id : ‘com.zubax.gnss’
product_name : ‘Zubax GNSS’
sw_version : ‘4.0’
sw_build_date: Apr 4 2017
hw_version : ‘2.2’
mode = BMP280_NORMAL
osrs_t = BMP280_LOWPOWER
osrs_p = BMP280_ULTRAHIGHRES
t_sb = BMP280_TSB_1
filter = BMP280_F8
spi3w_en = BMP280_3W_D