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Ratooragh Weather Systems

Campbell Scientific 2017-09-25 15:10:00 Pressure 1022mb, Temp 15.6°C, RH 87%, Wind Dir 184° at 6knots, Gusting to 11knots, Rain last 24 hrs = 0.2mm and Davis Vantage Pro 2017/09/25 15:10:00 Pressure 1021mb, Temp 14.3°C, RH 95%, Wind Dir 170° at 6knots, Gusting to 12knots, Rain last 24 hrs = 0.2mm <- Current Weather
Date Time: 2017/09/25 15:08, Turbine Speed: 699 rpm, WindSpeed: 5.10 knts, Input to Solar Tank: 6.17 watts, Input to Buffer Tank: 0.00 watts, Solar Relay: On, Buffer Relay: Off, Relay Override: Off, Solar Tank Temp: 46.00 C, Buffer Tank Temp: 20.77 C, Input to Solar Tank in 24Hrs: 0.03 kW, Input to Buffer Tank in 24Hrs: 0.00 kW, Total Energy Generated in 24Hrs: 0.03 kWatts and Date Time: 2017/09/25 15:10:07, PV Energy: 0.8 kW, Solar Rad. Time: 2017-09-25 15:05:00, Solar Rad.: 196 W/m², Sun Elevation: 27.2°, Total Generated in 24hrs: 16.989 kW <- Wind Turbine & PhotoVoltaic Output
Schull Tides for 2017-09-25 Time in UTC
1st HW 07:20 3.1m, 2nd HW 19:40 3.1m, 1st LW 01:00 0.5m, 2nd LW 13:20 0.5m

Altocumulus and Sea Fog

Altocumulus Lenticularis

Altocumulus Lenticularis

Altocumulus Lenticularis

Altocumulus Lenticularis

Altocumulus

Cirrocumulus with Contrails

Cirrocumulus

Cirrus

Crepuscular Rays

Crepuscular Rays

Cumulonimbus

Cumulonimbus

Cumulonimbus

Squall Line

Double Rainbow

Double Rainbow

Moonset

Sea Mist

The Sea 'Steaming'

Snow Storm

Storm Front, Thailand

Stratus

Altocumulus at Sunrise

Sun Setting

Sunset

Sunset under Stratocumulus

NTP Server

It is important to have good time keeping on a home network, particularly when receiving Weather Satellite Data. I have made an NTP Server from a Raspberry Pi and a Sure GPS module. I connected TP5 (GPS_Dataout) on the Sure GPS Board to a GPIO port on the Pi, and Gnd to Gnd of course. I used the Python module rpo_gpio_ntp, (link from David Taylor's Site once again) on  the Pi running Wheezy Raspian (a form of Debian Linux). All I do is to point the NTP clients at my server, and the computers will all be on the same time.

I now have a very low power device allowing my computers to keep accurate time, without polling the internet all the time. Very effective, and great fun to do.

Using MRTG Multi Router Traffic Grapher I can keep an eye on the performance of the NTP Server. The Time Offset in microseconds is shown. As can be seen, the error is very small indeed.