The proposed invention relates to an electronic ring for monitoring Vitamin D produced in a body of a user. The electronic ring comprises an Ultraviolet (UV) light sensor for determining a value of Ultraviolet B (UVB) radiation during exposure of sunlight on a body of a user. The electronic ring further comprises a microcontroller for determining an exposure time of the user to the sunlight. The microcontroller further determines an UVB dosage of the user based on a reciprocal of a product of the exposure time and a predefined weightage factor. The predefined weightage factor is associated with a wavelength of the UVB radiation. The microcontroller further determines an amount of Vitamin D produced in the body of the user based on the UVB dosage of the user.

The proposed invention relates to an electronic ring for monitoring Vitamin D produced in a body of a user. The electronic ring comprises an Ultraviolet (UV) light sensor for determining a value of Ultraviolet B (UVB) radiation during exposure of sunlight on a body of a user. The electronic ring further comprises a microcontroller for determining an exposure time of the user to the sunlight. The microcontroller further determines an UVB dosage of the user based on a reciprocal of a product of the exposure time and a predefined weightage factor. The predefined weightage factor is associated with a wavelength of the UVB radiation. The microcontroller further determines an amount of Vitamin D produced in the body of the user based on the UVB dosage of the user.

A high-precision solar resource assessment method based on a downscaling method for complex terrain includes steps as follows. Step (1): an average climatic field is calculated based on monitoring data of sunshine durations, climatic field interpolation results are obtained based on the average climatic field, and a climatic field is created. Step (2): a difference between data of the sunshine durations and the climatic field is calculated, anomaly field interpolation results are obtained based on the difference, and an anomaly field is created. Step (3): the climatic field interpolation results and the anomaly field interpolation results are overlayed. Step (4): bias adjustment is performed on the high-precision sunshine duration interpolation results obtained in the step (3) based on the monitoring data of the sunshine durations to obtain final results. Step (5): daily solar radiation is estimated based on the sunshine durations and extraterrestrial solar radiation.

A high-precision solar resource assessment method based on a downscaling method for complex terrain includes steps as follows. Step (1): an average climatic field is calculated based on monitoring data of sunshine durations, climatic field interpolation results are obtained based on the average climatic field, and a climatic field is created. Step (2): a difference between data of the sunshine durations and the climatic field is calculated, anomaly field interpolation results are obtained based on the difference, and an anomaly field is created. Step (3): the climatic field interpolation results and the anomaly field interpolation results are overlayed. Step (4): bias adjustment is performed on the high-precision sunshine duration interpolation results obtained in the step (3) based on the monitoring data of the sunshine durations to obtain final results. Step (5): daily solar radiation is estimated based on the sunshine durations and extraterrestrial solar radiation.