Hillshading of mountain relief in the Pyrenees.
Shadow cast by a pyramid with the sun at 15° elevation, 315° azimuth
Cumulative insolation over a day in spring on the island of La Palma, Canary Islands.
Calculates insolation on tilted surfaces, computes atmospheric transmittance and related parameters such as: Earth radius vector, declination, sunset and sunrise, daylength, equation of time, vector in the direction of the sun, vector normal to surface, and some atmospheric physics.
| Version: | 1.2.2 |
| Depends: | methods |
| Imports: | raster, rgdal |
| Suggests: | datasets, graphics, rgl, stats |
| Published: | 2020-03-26 |
| Author: | Javier G. Corripio |
| Maintainer: | Javier G. Corrripio <jgc at meteoexploration.com> |
| License: | GPL (≥ 2) |
| URL: | https://meteoexploration.com/R/insol/ |
| Package source: | insol_1.2.2.tar.gz |
| Reference manual: | insol.pdf |
| Vignette: | insol-V.pdf |
April, 2013
A new updated version 1.1 is available above and in the CRAN repository.
January 2019
Updated version 1.2
March 2020
Updated version 1.2.2
Feb 2023
No longer maintained. CRAN found unacceptable that an example marked as "not run" complained when downloading a GEOTiff in a remote server.
Corrected in version 1.2
Corrected in version 1.2.2
Bird, R. E. and Hulstrom, R. L. (1981a) Review, evaluation and improvements of direct irradiance models, Trans. ASME J. Solar Energy Eng. 103, 182-192.
Bird, R. E. and Hulstrom, R. L. (1981b) A simplified clear sky model for direct and diffuse insolation on horizontal surfaces, Technical Report SERI/TR-642-761, Solar Research Institute, Golden, Colorado. pdf
Bourges, B.: 1985, Improvement in solar declination computation, Solar Energy 35(4), 367-369.
Corripio, J. G.: 2003, Vectorial algebra algorithms for calculating terrain parameters from DEMs and the position of the sun for solar radiation modelling in mountainous terrain, International Journal of Geographical Information Science 17(1), 1-23. pdf
Danby, J. M. Eqn. 6.16.4 in Fundamentals of Celestial Mechanics, 2nd ed. Richmond, VA: Willmann-Bell, p. 207, 1988.
https://aa.usno.navy.mil/data/JulianDate
https://aa.usno.navy.mil/faq/JD_formula
https://aa.usno.navy.mil/software/novaspy_intro
https://adsabs.harvard.edu/full/1983IAPPP..13...16F
https://gml.noaa.gov/grad/solcalc/calcdetails.html
Iqbal, M. (1983) An Introduction to Solar Radiation, Academic Press, Toronto.
Meeus, J. 1999. Astronomical Algorithms. Willmann-Bell, Richmond, Virginia, USA.
Reda, I. and Andreas, A. 2003. Solar Position Algorithm for Solar Radiation Applications. 55 pp.; NREL Report No. TP-560-34302, Revised January 2008.
Hillshading of mountain relief in the Pyrenees. |
Shadow cast by a pyramid with the sun at 15° elevation, 315° azimuth |
Cumulative insolation over a day in spring on the island of La Palma, Canary Islands. |