The rainfall collector and temperature / humidity / pressure measuring system is properly shielded and sited away from any major structures.
The reading should therefore be very accurate (although no guarantees or warranties can of course be given).
The anemometer is mounted above the roof line to give an unimpeded measurement of the wind.
Thankfully Robert Hill, chimney sweep extraordinaire (01252 – 621031), was available to properly orient and secure the securing brackets.
The Solar sensor in our Tempest Weather station measures solar radiation in Watts per square metre, UV index and the amount of sunlight.
This also allows (along with the anemometer and temperature/humidity sensor) us to monitor evapotranspiration to give a sense of how much water plants are needing each day.
The diffuser element and housing are carefully designed for accurate cosine response. Silicon photo diode provides good match to solar spectrum.
The two-piece housing minimizes radiation heating, allows convection cooling of the sensor, and prevents the trapping of water or dust.
The PA-II is an air quality sensor that measures real-time PM2.5 concentrations using PMS5003 and PMS1003 laser particle counters.
These sensors count suspended particles in sizes of 0.3, 0.5, 1.0, 2.5, 5.0, and 10um. These particle counts are processed by the sensor using a complex algorithm to calculate the PM1.0, PM2.5, and PM10 mass concentration in ug/m3.
It has a built-in WiFi which enables the air quality measurement device to transmit data to our site and also the PurpleAir map, where it is stored and made available to any smart device.
The latest data is available here and the overall map is here
The lightning sensor in our Tempest device can detect strikes up to 40 km away, and while it does a good job at detecting many strikes in this range, it is far from 100% efficient. The closer the strike, the more likely the sensor will detect it, but it can miss-report strikes at any distance.
It can also be susceptible to nearby electromagnetic interference and sometimes it’s difficult for the algorithms onboard to tell if a strike is real or a “false positive”.
However, the data reported by the individual sensor in the Tempest is supported by additional data and a sophisticated back-end process that significantly improves the reporting of lightning. This is accomplished by comparing data from the Tempest with other nearby Tempests along with several trusted, third-party lightning data sources. The result is the best lightning strike data available.
Strike Confirmation: Lightning strikes observed by a Tempest device are validated and processed normally.
False Strike Identification: When a strike from a particular Tempest device cannot be validated, it is flagged as a false positive (useful for quality control & analysis), and not reported.
Missed Strike Correction: If the combined additional data sources confirm a lightning strike near a Tempest that was not detected by the device, the system will fill in the gap with the validated strike information.
Key future developments to further enhance the weather statistics and reporting include:
Enhanced Lightning detection system, to give graphical overlay on local map as well as more details on intensity and frequency etc
Cloudcover measure, to give better information on amount of sunshine and amount of “cloudiness”