Author Topic: Multipath distortion with WS-2902, GW-1000 etc  (Read 239 times)

0 Members and 1 Guest are viewing this topic.

Offline WA4OPQ

  • Forecaster
  • *****
  • Posts: 320
  • 4 stations: 2902 array, GW1000, 3 on Meteobridge
Multipath distortion with WS-2902, GW-1000 etc
« on: July 28, 2020, 01:11:13 AM »
Most people will never have this problem, but I'm putting this out there for some poor soul in the future.

The path between my 2902 array and my GW-1000 goes through my carport. Well, it turns out that there are some "magic" spots that if I park my car there then my signal and wx data goes away. It's because the radio reflection off of the car can be out of phase and cancel the main signal.

Just tonight I returned from the store, and checking WU I saw my signal and data went away. Rebooting the GW-1000 did no good. But when I moved the GW-1000 just three inches everything started working again.

I may have to install an external antenna on the array to solve this for good. But at least I know what it is.

Offline Mandrake

  • Forecaster
  • *****
  • Posts: 1102
Re: Multipath distortion with WS-2902, GW-1000 etc
« Reply #1 on: July 28, 2020, 03:54:40 AM »
I have noticed through experimentation that there is definitely a degree of polarisation also at play in the transmitted signal as well no doubt complicated by reflections.
Future consoles/GW1000 would do extremely well if they added a small aerial connector to the back to allow an external antenna to be added to resolve these 'sensitivity' issues!

Ecowitt HP2551A + WH65 Tri-Wing (Wunderground: IGUILDFO67)
Ecowitt GW1000 (Wunderground: IGUILDFO68)
Ecowitt GW1000 (Mk2) test environment driving CumulusMX on a RPi 3b
Ecowitt GW2000 (Test)
Ecowitt WS90 Wittboy - Test
Ecowitt WH51 (x6) Soil Moisture Sensor
Ecowitt WH41 PM2.5 AQM Sensor
Ecowitt WH31 (x8) Thermo/Hygro Sensor
Ecowitt WS80 Ultrasonic Anemometer (pre-prod test)
Ecowitt WH57 Lightning Sensor -test
Ecowitt WH32-EP (SHT35) + Davis 7714 Screen
Ecowitt WH45 CO2/PM2.5/PM10 -Test
Ecowitt WN34 Soil Temp Sensor -Test
Ecowitt WN34 Water Temp Sensor -Test
Ecowitt WN35 Leaf Moisture