Oct 07 2018
The Zambretti Forecaster is a weather forecasting tool in the form of a circular slide rule introduced in 1920. It claims to accurately predict near-term weather based on barometric pressure, the trend in the pressure (rising, steady, or falling), and wind direction. It relies on the fundamental meteorology of pressure fronts. Watch any TV weather forecast and …
Permanent link to this article: https://w4krl.com/zambretti-forecaster/
Sep 07 2018
The amateur radio Automatic Packet Reporting System (APRS) is typically used for position and weather reporting. It can also handle eight digital and five analog telemetry channels. The IoT Kits© solar-powered weather stations have four APRS analog telemetry channels for LiPo cell voltage, time awake, WiFi signal strength, and light intensity. Four digital channels are used …
Permanent link to this article: https://w4krl.com/sending-aprs-analog-telemetry-the-basics/
Jun 08 2018
An instrument shelter provides a flow of air around weather sensors while protecting them from direct sunlight and rain. Without a shield, the sun can heat the temperature sensor giving a false high-temperature reading. Professional weather stations use a large louvered box called a Stevenson Screen that is built to specific dimensions for standardized weather …
Permanent link to this article: https://w4krl.com/diy-instrument-shield/
Jun 07 2018
The D1M-WX1 and D1S-WX1 solar-powered weather stations heat up in direct sunlight giving an incorrectly high-temperature reading. Early results from testing an Acurite solar radiation shield are very good. The shield is available from several online vendors. Check around for a good price as the same item sells for $10 to $60 from different vendors. …
Permanent link to this article: https://w4krl.com/solar-radiation-shield-under-test/