Icstation NEO-M8N GPS Module Triple Band TTL Port with Acitive Antenna for Arduino STM32 C51 Replace NEO-6M

lately youtubers here is the guy with a Swiss accent again in the video about precise altitude measurement I said that the GPS receiver was not very precise compared to the pressure sensor and I promised a test of GPS receivers now I got the newest u-blox GPS receiver the neo m8 in the mail and I compared it with its predecessor the Neo 6m in between the tool was the neo 7 series they were not very often used in the hoppy community and are now advertised as low cost and low energy consumption I need precision this is why I did not test the series 7 module as with the pressure sensors I compared the two sensors in one position this is easier because I do not need to know the exact position of the sensor but it is sufficient for my purpose because I need exact relative data and this is exactly what I get if I leave the center at one spot the actual key GPS sensors have a lot of possible c