The totalsolarradiation was high in the southeast region, where there was a large value center.
南部偏东地区较大，且存在有一大值中心；
2
The totalsolarradiation showed a relatively larger decline in the northern and southern region than in the center part.
江西省北部及南部地区太阳总辐射下降较大；
3
This paper theoretically studies a method of retrieving the cloud optical depth from totalsolarradiation and analyzes main sources of errors in the optical depth solution.