Spherical Rectangular Equal-Area Grid (SREAG)

• GRIDPAR.FOR:   Compute parameters of the grid for a given number of rings
• CELLPAR.FOR:   Compute the cell parameters for a given cell number
• POS2CN2.FOR:  Compute the cell number for a given point position
• CN2POS2.FOR:  Compute the cell center coordinates for a given cell number
• NR2NC.FOR:  Compute the number of cells for a given number of rings
• NC2NR.FOR:  Compute the nearest number of rings for a given number of cells

• References:
  1. Malkin Z. A new equal-area isolatitudinal grid on a spherical surface. AJ, Vol. 158, No. 4, id. 158, 2019. DOI: 10.3847/1538-3881/ab3a44
  2. Malkin Z. Spherical Rectangular Equal-Area Grid (SREAG)-Some features. In: Proc. Journees 2019 Astrometry, Earth Rotation, and Reference Systems in the GAIA era, Paris, France, 7-9 Oct 2019, Ed. Ch. Bizouard, 2020, 55-59. Also available in arXiv:1912.05593

Statistics

• PSIAP.FOR:   Compute the inverse standard normal distribution
• QNORM.FOR:  Compute the inverse standard normal distribution
• QETAS.FOR:   Compute statistics Zeta(eta,s*)
• QETAS2.FOR:  Compute statistics Zeta(eta,s*)
• QSTUD.FOR:  Compute a quantile of the Student distribution

Licensing

All the author's materials and results presented at this webpage are distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Contact:  Zinovy Malkin, malkin@gaoran.ru, zmalkin.com

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