airmass	zenith dist. (Z)	zenith dist.	Sec. Z
	(radians)	(degrees)
1.0000	0.0000	0.0000	1.0000
1.0002	0.0175	1.0027	1.0002
1.0006	0.0349	1.9996	1.0006
1.0014	0.0524	3.0023	1.0014
1.0024	0.0698	3.9992	1.0024
1.0038	0.0873	5.0019	1.0038
1.0055	0.1047	5.9989	1.0055
1.0075	0.1222	7.0015	1.0075
1.0098	0.1396	7.9985	1.0098
1.0124	0.1571	9.0012	1.0125
1.0154	0.1745	9.9981	1.0154
1.0187	0.1920	11.0008	1.0187
1.0223	0.2094	11.9977	1.0223
1.0263	0.2269	13.0004	1.0263
1.0306	0.2443	13.9974	1.0306
1.0352	0.2618	15.0000	1.0353
1.0402	0.2793	16.0027	1.0403
1.0456	0.2967	16.9997	1.0457
1.0514	0.3142	18.0023	1.0515
1.0575	0.3316	18.9993	1.0576
1.0640	0.3491	20.0020	1.0642
1.0710	0.3665	20.9989	1.0711
1.0784	0.3840	22.0016	1.0785
1.0862	0.4014	22.9985	1.0863
1.0944	0.4189	24.0012	1.0946
1.1032	0.4363	24.9981	1.1034
1.1124	0.4538	26.0008	1.1126
1.1221	0.4712	26.9978	1.1223
1.1323	0.4887	28.0004	1.1326
1.1430	0.5061	28.9974	1.1433
1.1543	0.5236	30.0001	1.1547
1.1662	0.5411	31.0027	1.1667
1.1788	0.5585	31.9997	1.1792
1.1919	0.5760	33.0024	1.1924
1.2057	0.5934	33.9993	1.2062
1.2202	0.6109	35.0020	1.2208
1.2355	0.6283	35.9989	1.2361
1.2515	0.6458	37.0016	1.2522
1.2683	0.6632	37.9986	1.2690
1.2860	0.6807	39.0012	1.2868
1.3046	0.6981	39.9982	1.3054
1.3241	0.7156	41.0009	1.3250
1.3446	0.7330	41.9978	1.3456
1.3662	0.7505	43.0005	1.3673
1.3890	0.7679	43.9974	1.3901
1.4129	0.7854	45.0001	1.4142
1.4381	0.8029	46.0028	1.4396
1.4647	0.8203	46.9997	1.4663
1.4928	0.8378	48.0024	1.4945
1.5224	0.8552	48.9993	1.5242
1.5537	0.8727	50.0020	1.5558
1.5868	0.8901	50.9990	1.5890
1.6218	0.9076	52.0016	1.6243
1.6589	0.9250	52.9986	1.6616
1.6983	0.9425	54.0013	1.7014
1.7402	0.9599	54.9982	1.7434
1.7847	0.9774	56.0009	1.7883
1.8321	0.9948	56.9978	1.8360
1.8826	1.0123	58.0005	1.8871
1.9367	1.0297	58.9975	1.9415
1.9945	1.0472	60.0001	2.0000
2.0565	1.0647	61.0028	2.0628
2.1232	1.0821	61.9998	2.1300
2.1949	1.0996	63.0024	2.2029
2.2724	1.1170	63.9994	2.2811
2.3563	1.1345	65.0021	2.3664
2.4473	1.1519	65.9990	2.4585
2.5464	1.1694	67.0017	2.5595
2.6547	1.1868	67.9986	2.6693
2.7733	1.2043	69.0013	2.7906
2.9039	1.2217	69.9983	2.9236
3.0483	1.2392	71.0009	3.0717
3.2086	1.2566	71.9979	3.2357
3.3876	1.2741	73.0006	3.4204
3.5887	1.2915	73.9975	3.6274
3.8159	1.3090	75.0002	3.8637
4.0748	1.3265	76.0029	4.1344
4.3720	1.3439	76.9998	4.4453
4.7164	1.3614	78.0025	4.8107
5.1198	1.3788	78.9994	5.2406
5.5979	1.3963	80.0021	5.7600
6.1723	1.4137	80.9990	6.3918
6.8728	1.4312	82.0017	7.1868
7.7408	1.4486	82.9987	8.2040
8.8320	1.4661	84.0013	9.5689
10.2106	1.4835	84.9983	11.4698
11.8831	1.5010	86.0010	14.3390
13.3330	1.5184	86.9979	19.0940