Date-Time in ISO format

Pressure (measured variable) exerted by the atmosphere

RVQ codes explain missing, unusual, or potentially erroneous data vales. The codes can be found here

Photosynthetically active radiation (PAR) is a measure of light. It is the intensity of the part of sunlight that plants can use to support new growth, and also the wavelengths of light that our eyes are sensitive to. It is measured on a small white disc that records the sum of light falling directly from the sun plus the light scattered by the sky and clouds. It is reported in a unit called a micro-Einstein.

RVQ codes explain missing, unusual, or potentially erroneous data vales. The codes can be found here

Rain is reported in millimetres accumulated every 15 minutes in a gauge set about 1 m above the ground. Rain falling into a 6-inch diameter funnel drips onto one of a pair of “buckets”, mounted on a teeter-totter. When one bucket is filled, the teeter-totter flips, the first bucket is emptied and rain then drips into the other “bucket” until it is filled, and so on. Each flip is equal to 0.2 mm of rain.

RVQ codes explain missing, unusual, or potentially erroneous data vales. The codes can be found here

We report temperature in the shade, in Centigrade degrees. It is measured using an electronic thermometer shielded from direct sunlight and mounted inside an enclosure with louvered walls to allow free air flow past the sensor.

RVQ codes explain missing, unusual, or potentially erroneous data vales. The codes can be found here

Relative humidity is the amount of water vapour in the air reported as a percentage of the amount that would saturate it at the air temperature. Warmer air can hold more water vapour than cooler air.

RVQ codes explain missing, unusual, or potentially erroneous data vales. The codes can be found here

Wind speed is measured using a spinning anemometer mounted on the wind vane at the top of the tower, about 3 m above the ground. We report the average speed for every 15 minute period, in kilometres per hour.

Wind speeds reported at St Laurent Li Taan Aen Staansyoon indicate speeds that would be felt nearby on the lake only when the wind blows from SSW through W to NNW. The anemometer is sheltered from the full force of the wind by trees in other directions.

Wind speeds are measured 3 m above the ground surface. Environment Canada and Manitoba Department of Agriculture weather stations report faster speeds because they are recorded on higher, 10 m towers.

RVQ codes explain missing, unusual, or potentially erroneous data vales. The codes can be found here

Wind gusts are the highest wind speed recorded in each 15 minute period, and are also recorded in kilometres per hour.

Wind gust speeds reported at St Laurent Li Taan Aen Staansyoon indicate speeds that would be felt nearby on the lake only when the wind blows from SSW through W to NNW. The anemometer is sheltered from the full force of the wind by trees in other directions.

Wind gust speeds are measured 3 m above the ground surface. Environment Canada and Manitoba Department of Agriculture weather stations report faster speeds because they are recorded on higher, 10 m towers.

RVQ codes explain missing, unusual, or potentially erroneous data vales. The codes can be found here

Wind direction is measured using a wind vane mounted at the top of the tower. As we do with wind speed, we report the average direction for every 15 minutes, in compass degrees from true north. It is then converted to a direction.

RVQ codes explain missing, unusual, or potentially erroneous data vales. The codes can be found here

Battery voltage

RVQ codes explain missing, unusual, or potentially erroneous data vales. The codes can be found here