An environmental research station uses a network of automated sensors to monitor air pollution. Each sensor has a unique alphanumeric Sensor ID. The concentration of fine particulate matter (PM2.5\text{PM}_{2.5}PM2.5, measured in μg/m3\mu\text{g/m}^3μg/m3) is recorded at different times of the day for each sensor.
A two-dimensional array is used to store this pollution monitoring data.
Complete the table to show appropriate column headings and realistic example data for this data structure.
159 exam-style questions on Edexcel GCSE Computer Science Algorithms, covering Constructs for solving problems, Variables, constants and data structures, Arithmetic, relational and logical operators, Tracing algorithm output with trace tables, Types of error and correcting logic errors, Standard algorithms (sorts and searches), and Evaluating algorithm fitness and efficiency. Each one has a worked solution and a mark scheme showing where the marks go.