Research Article
Validation of ASTER Surface Temperature Data with In Situ Measurements to Evaluate Heat Islands in Complex Urban Areas
Table 3
Comparison of mean surface temperatures collected from ASTER images and field measurements at the measurement sites.
| | | | UC | P | LR | CA | SR | HR | HL | HS |
| | Daytime | 07/28 | | | | | | | | | | Timage (°C) | 38.9 | 41.2 | 39.9 | 38.2 | 37.3 | 31.9 | 41.2 | 44.3 | | Tin situ (°C) | 46.5 | 44.5 | 47.9 | 49.8 | 49.6 | 46.8 | 46.7 | 51.0 | | RMSE (°C) | 8.1 | 5.4 | 8.4 | 11.8 | 13.4 | 15.7 | 6.1 | 7.9 | | 09/23 | | | | | | | | | | Timage (°C) | 30.4 | 30.4 | 31.5 | 32.1 | 32.2 | 29.8 | 32.0 | 33.2 | | Tin situ (°C) | 33.1 | 34.6 | 34.7 | 35.6 | 36.8 | 34.3 | 35.4 | 38.2 | | RMSE (°C) | 3.2 | 5.1 | 3.7 | 3.8 | 5.0 | 4.7 | 4.4 | 5.3 | | Nighttime | 09/21 | | | | | | | | | | Timage (°C) | 17.0 | 17.3 | 19.0 | 19.4 | 17.7 | 18.7 | 17.6 | 17.3 | | Tin situ (°C) | 15.3 | 15.3 | 16.5 | 17.3 | 16.4 | 16.4 | 14.3 | 16.0 | | RMSE (°C) | 1.9 | 2.3 | 2.6 | 3.1 | 1.6 | 2.4 | 3.7 | 1.9 | | 09/28 | | | | | | | | | | Timage (°C) | 16.5 | 17.8 | 18.7 | 19.0 | 18.5 | 19.2 | 17.3 | 17.3 | | Tin situ (°C) | 15.0 | 15.5 | 16.1 | 16.5 | 15.8 | 16.0 | 13.9 | 16.9 | | RMSE (°C) | 1.6 | 2.4 | 2.7 | 2.5 | 2.8 | 3.3 | 3.9 | 1.1 |
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UC: university campus, P: urban park, LR: low-rise apartments, CA: commercial area, SR: single residential, HR: high-rise apartments, and HL: homogenous lawn, HS: homogenous sidewalk brick.
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