Ghost Mine Ranch Weather Station

This weather station is on Lot 3 in the Ghost Mine Ranch subdivision, 8 miles due north of Del Norte on the west side of the San Luis Valley in Colorado.
Latitude: 37.7922 N
Longitude: 106.3409 W
Elevation: 8250 feet

The weather station is a Davis Instruments wireless Vantage Pro 2 Plus with a passive radiation shield.

The picture above is of the Integrated Sensor Suite (ISS). The black cone in the picture is the rain gauge collector; the wires pointing up from the rain collector are "bird spikes". The temperature and humidity sensor are in the white radiation shield beneath the rain collector. The anemometer and wind vane are on the boom to the right. The solar radiation sensor (left) and UV sensor (right) are up on the platform to the left of the rain collector. Davis states that the accuracy is ±0.5 F for the temperature sensor (bias up to +4F for strong sunlight and light winds), ±2% for outside relative humidity, ±1 mb in pressure, greater of 3% or 0.01 inch for rainfall (one tip of bucket), greater of ±2 mph or 5% for wind speed, and ±5% of full scale for solar radiation and UV index (with up to 2% drift per year).

An indoor console receives the data from the ISS via a radio link. The console measures the barometric pressure, and the indoor temperature and humidity. A serial data logger attached to the console saves the data. A custom C program running on a Linux laptop computer downloads the data from the logger, which is uploaded over the internet to a server. A shell script on the server computer makes the graphs, collects the statistics, and formats the web page.

The orginal Vantage Pro weather station was installed in June 2004. In February 2007 the station was replaced by a Vantage Pro 2, though the old solar sensor was transferred. This new Vantage Pro 2 Plus station was brought online at 15:50 on 2021-11-15 and made fully operational (including the barometer) at 8:10 on 2021-11-17. There is a significant positive jump in the solar radiation measurement due to the steady downward calibration drift of the old sensor.