Publications

Masabi, BS; Aghashariatmadari, Z; Hejabi, S (2021). Evaluation the efficiency of a parametric model based on MODIS data for solar radiation estimation in comparison with some empirical models. ARABIAN JOURNAL OF GEOSCIENCES, 14(15), 1508.

Abstract
In the present study, the output of several empirical models for estimating solar radiation and the output of a model based on data obtained from moderate resolution imaging spectroradiometer (MODIS) sensor (parametric model) are compared with ground observational station to introduce a suitable algorithm for estimating solar radiation in the studied stations. For this purpose, first the selected empirical models were calibrated according to the climatic conditions of the study area and then used to estimate solar radiation. To this aim, empirical models were evaluated based on suitably partitioned datasets. 75% of the total data were utilized for training phase and the remaining 25% data were used for testing phase and conducting statistical analysis. In the next step, the parametric model (SBDART) were tested and used for predicting the solar radiation data in target stations. The results indicated that the R-2 value of models vary between 0.25 to 0.95, most of which are related to the Santa Barbara DISORT (discrete ordinates radiative transfer) atmospheric radiative transfer (SBDART) (R-2=0.95) and calibrated Angstrom models (R-2=0.89), respectively. The mean absolute percentage error of the SBDART model is significantly different from other models (MAPE=4.3%). After that, the lowest MAPE (mean absolute percentage error) is related to the Angstrom model (MAPE =5.98%). In addition, the parametric model is more efficient on cloudy days than on cloudless days so that the calculated RMSE (root mean square error) and MBE (mean bias error) indices are 9.07 W/m(2).day and -0.72 W/m(2).day for cloudy days, and 19.77 W/m(2).day and 3.60 W/m(2).day for cloudless days. In contrast, the empirical Angstrom-Prescott model had better results with observational data on cloudless days so that the indices were RMSE =43.60 W/m(2).day and MBE =34.25 W/m(2).day for cloudy days, and RMSE =29.56 W/m(2).day and MBE= 6.19 MJ/m(2).day for cloudless days.

DOI:
10.1007/s12517-021-07999-z

ISSN:
1866-7511