News Updates Tuesday 25th Oct 2016 :
  • Welcome to International Press Corporation, world's leading publishers, We have served more than 10000+ authors
  • Articles are invited in engineering, science, technology, management, industrial engg, biotechnology etc.
  • Paper submission last date of Sept/Oct 2016 issue is 25 Oct 2016, Submit online or at
  • Our journals are indexed in University of Regensburg Germany, Google Scholar, Cross Reference data bases
  • Applications for reviewers are invited and can be sent directly to concerned editor's mail

Day Length Estimation over India: A Case Study

Author : GarimaTiwari, V.K. Katiyar, C. K. Panday and A.K. Katiyar

Pages : 2143-2158
Download PDF

The day length So is the essential parameter for calculating the solar radiation data. In order to determine the day length, two correlations have been developed by Cooper and Hay, and both correlations have been frequently used by different researchers. The main objective of this study is to test the applicability of these two correlations available for computing the day length value on horizontal surface in India. For this purpose, the developed correlations are employed to estimate the day length values on horizontal surface for nine locations with latitude between 8.50 N to 28.630 N. The performances of these correlations have been checked by it with the measured value. From this study, a close agreement has been observed between the Cooper correlations and the measured data on the duration between sunrise and sunset. Furthermore, in order to evaluate the accuracy of Cooper’s method reported in this paper for computing the day length S0 for India, the developed correlations were then compared on the basis of statistical error indices such as root mean square error (RMSE), mean bias error (MBE), relative percentage error, and t-statistics test. According to the results the Cooper method showed the best estimation of day length values for nine Indian stations.

Keywords: Cooper, Hay, Day length

Article published in International Journal of Current  Engineering  and Technology, Vol.3,No.5(Dec- 2013)




Call for Papers
  1. IJCET- Sept/Oct-2016 Issue

    Submission Last Date
    25 Oct 2016
  2. IJTT-Sept-2016
  3. IJAIE-Sept-2016
  4. IJCSB-Sept-2016
  • Inpressco Google Scholar
  • Inpressco Science Central
  • Inpressco Global impact factor
  • Inpressco aap

International Press corporation is licensed under a Creative Commons Attribution-Non Commercial NoDerivs 3.0 Unported License
©2010-2016 INPRESSCO® All Rights Reserved