From: Estimation of solar radiation from cloud cover data of Bangladesh

Models | Regression equations | Source |
---|---|---|

Linear | \(H/H_0= a + b (S/S_0)\) | Angstrom–Prescott (1924, 1940) |

Quadratic | \(H/H_0 = a + b (S/S_0) + c (S/S_0)^2\) | Akinoglu and Ecevit (1990) |

Third degree | \(H/H_0 = a + b (S/S_0) + c (S/S_0)^2 + d (S/S_0)^3\) | Ertekin and Yaldiz (2000) |

Logarithmic | \(H/H_0 = a + b\cdot \log (S/S_0)\) | Ampratwum and Dorvlo (1990) |

Exponential | \(H/H_0 = a\cdot \exp [b\cdot (S/S_0)]\) | Almorox and Hontoria (2004) |

Power | \(H/H_0 = a\cdot (S/S_0)^b\) | Sen (2007) |