Xiaoying Ouyang

This study used the radiation transfer equation method to retrieve surface temperatures from the thermal infrared bands 2 and 3 of SDGSAT-1. The retrieval results were then compared with the measured ground station data, as illustrated in below. All temperature units are Kelvin (K). The figure indicates that the temperatures retrieved by the single-channel algorithm are generally higher than those measured at the ground station.

4. Results 4.1. Quantifying the Development Progress of Specific Goals According to the calculation method of single indicators, the development level of a city can be visualized using a traffic light system, with green, yellow, orange, and red colors []. Based on the sub-indicator scores for ranking, among the 13 cities and counties, those ranked 1–4 are considered green indicators, those ranked 5–9 are considered yellow indicators, and those ranked 10–13 are considered orange indicators.