Adaptive solar tracking system for pyrheliometers.

In this article, an adaptative two-axis solar tracker is developed. The system uses a self-calibration strategy and algorithm that, without the need for additional sensors, automates the solar pointing and tracking process for a pyrheliometer, thus avoiding a significant portion of the manual installation process and the need for error correction by an operator. • Solar trackers for pyrheliometers require high precision and are expensive. • To measure direct normal irradiance, one must adhere to the BSRN guidelines. • DNI is distributed as a revolution paraboloid around the Sun from the Earth's surface. • The algorithm enables autonomous solar localization and tracking with BSRN accuracy. • The system autonomously determines Earth's North from the Sun's sky position. [ABSTRACT FROM AUTHOR]