Chapter 3 Calculation of ground solar radiation Qa(w/mday) 247)(Io/p2)(osinφ·sinδ+cosφ·cos6·sino) Io-solar constant, 1367 W/m2 @. -solar angels of sun raise and sunset 0 φ- latitude 8sun赤纬 °dn-— the series number of the day b/a ssessment of Climate/ Change Impact 19of76Chapter 3 Assessment of Climate/Change Impacts 19 of 76 Calculation of Ground Solar Radiation Qa(W/m2 day) =(24/)(Io/ 2 )(o·sin ·sin + cos· cos·sino ) • Io –solar constant, 1367 W/m2 • o –solar angels of sun raise and sunset • --latitude •  sun 赤纬 • dn—the series number of the day • =b/a