International Science Community Association Research Journal of Chemical Sciences 2231 - 606X 7 7 2017 07 18 Study of solar irradiance at low land Simara Nepal, using Angstrom\'s empirical model 45 49 EN Seleem H.S. 1 Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt El-Inany G.A. 2 Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt El-Shafiy H. 3 Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt Mousa M. 4 Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt Madyan A. 5 Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt El-Shetary B.A. 6 Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt Axel Lontsi Tiwa 1 Institute of Medical Research and Medicinal Plants Studies (IMPM), P.O. Box 6163, Yaoundé, Cameroon and Department of Organic Chemistry, University of Yaoundé I, P.O Box 812, Yaoundé, Cameroon Alembert Tiabou Tchinda 2 Institute of Medical Research and Medicinal Plants Studies (IMPM), P.O. Box 6163, Yaoundé, Cameroon Ratnasooriya W.D. 1 Faculty of Allied Health Sciences, General Sir John Kotelawala Defence University, Ratmalana, Sri Lanka and Department of Zoology, University of Colombo, Colombo-03, Sri Lanka Abeysekera W.P.K.M. 2 Herbal Technology Section, Industrial Technology Institute (ITI), 363, Bauddhaloka Mawatha, Colombo 07, Sri Lanka Premakumara G.A.S. 3 Herbal Technology Section, Industrial Technology Institute (ITI), 363, Bauddhaloka Mawatha, Colombo 07, Sri Lanka Ratnasooriya C.D.T. 4 Faculty of Medicine, University of Colombo, Colombo-08, Sri Lanka Ratnasooriya S.G. 5 Faculty of Medical Sciences, University of Sri Jayewardenepura, Gangodawila, Nugegoda, Sri Lanka Madara D.W. Samaranayake 1 Food Technology Section, Industrial Technology Institute (ITI), P.O. Box 787, 363, Bauddhaloka Mawatha, Colombo 07, Sri Lanka Aruma B.G.C.J. De Silva 2 Food Technology Section, Industrial Technology Institute (ITI), P.O. Box 787, 363, Bauddhaloka Mawatha, Colombo 07, Sri Lanka Warnakulasuriya R.D. Fernando 3 Food Technology Section, Industrial Technology Institute (ITI), P.O. Box 787, 363, Bauddhaloka Mawatha, Colombo 07, Sri Lanka Katudeni V.T. Gunawardhane 4 Food Technology Section, Industrial Technology Institute (ITI), P.O. Box 787, 363, Bauddhaloka Mawatha, Colombo 07, Sri Lanka Herath Mudiyanselage T. Herath 5 Food Technology Section, Industrial Technology Institute (ITI), P.O. Box 787, 363, Bauddhaloka Mawatha, Colombo 07, Sri Lanka Sarabjit Kaur 1 Chemistry Department, Punjabi University Patiala, Punjab–147002, India Gurcharn Kaur 2 Chemistry Department, Punjabi University Patiala, Punjab–147002, India Jatinder Singh 3 Chemistry Department, Punjabi University Patiala, Punjab–147002, India Mangalshree Dulawat 1 Department of Chemistry, PG Girls College, B N University, Udaipur 313 001, India Jyoti Prajapati 2 Department of Chemistry PAHER University, Udaipur 313 001, India Arpita Matta 3 Department of Chemistry, PG Girls College, B N University, Udaipur 313 001, India Renu Rathore 4 Department of Chemistry, PG Girls College, B N University, Udaipur 313 001, India Shiv Singh Dulawat 5 Department of Chemistry PAHER University, Udaipur 313 001, India Alka Banchhor 1 Department of Applied Chemistry, Bhilai Institute of Technology, Durg, Chhattisgarh, 491002, India Madhurima Pandey 2 Department of Applied Chemistry, Bhilai Institute of Technology, Durg, Chhattisgarh, 491002, India Piyush kant Pandey 3 Bhilai Institute of Technology, Raipur, Chhattisgarh, 493661, India Gaurav Kunwar 1 Department of Physics, Patan Multiple Campus, T.U. Nepal Khem Naryan Poudyal 2 Institute of Engineering, Tribhuvan University, Nepal > Review Paper 2017 4 25 2017 07 18 The daily solar irradiance was measured using CMP6 first class Pyranometer of the low land region Simara (27.160 N, 84.980 E) Nepal. The solar radiation coming to earth surface primarily depends on the climate conditions. In developing countries like Nepal, there is no sufficient reliable data of solar irradiance and measuring instruments. In the absence of sufficient data there is a need of an empirical model to estimate the solar irradiance which seems very important in every region of Nepal. This empirical model use several meteorological parameters among them sunshine hour are mostly and commonly used parameters. The least square regression is performed to derive these constants. The measured and predicted solar irradiance were tested using mean percentage error (MPE), mean bias error (MBE) and root mean square (RMSE) Further, we calculated corresponding value of coefficient of determination (R2). The predicted and measured values get close to each other and hence they are remarkable. Finding regression constants are used to predict the GSR at that location for further utilization. This Solar energy can be utilized to mitigate energy crisis at that location. In addition, this finding also helps to grow more crops or foods on the basis of rainfall, sun shine hour, humidity, temperature. Copyright@ International Science Community Association