lat,clear-sky_ERF 87.8638,0.21389589 85.09653,0.2132476 82.31291,0.2021061 79.525604,0.18376538 76.7369,0.17069082 73.94752,0.1445908 71.15775,0.14193498 68.36776,0.14491208 65.57761,0.116805285 62.787354,0.10242305 59.99702,0.11223843 57.20663,0.1235881 54.4162,0.12825958 51.625732,0.14462523 48.83524,0.15203708 46.044727,0.17234191 43.254196,0.18872432 40.46365,0.20494394 37.673088,0.213039 34.882523,0.23176388 32.091946,0.24537076 29.30136,0.27074355 26.510769,0.29009792 23.720175,0.30201566 20.929575,0.3097851 18.138971,0.29689077 15.348365,0.28278667 12.557756,0.27123353 9.767145,0.26094547 6.9765334,0.26670313 4.1859207,0.27812794 1.395307,0.28609094 -1.395307,0.27571568 -4.1859207,0.23190446 -6.9765334,0.235183 -9.767145,0.25264913 -12.557756,0.24979934 -15.348365,0.2600434 -18.138971,0.27224883 -20.929575,0.28628063 -23.720175,0.29489362 -26.510769,0.30651683 -29.30136,0.31060287 -32.091946,0.30421236 -34.882523,0.2982368 -37.673088,0.28734785 -40.46365,0.27501863 -43.254196,0.26362723 -46.044727,0.2567339 -48.83524,0.252636 -51.625732,0.25582454 -54.4162,0.26696047 -57.20663,0.29328865 -59.99702,0.34427127 -62.787354,0.4063687 -65.57761,0.48513728 -68.36776,0.54658777 -71.15775,0.5579212 -73.94752,0.53381133 -76.7369,0.5211634 -79.525604,0.5274887 -82.31291,0.5331552 -85.09653,0.525822 -87.8638,0.49324083