OH1TV   OH1O   OH1WX
	Minimum distance between stations during Es contact as function of  foEs
	Es-layer height assumed to be 120km
		foEs	d	TOA
		9.57	2450	0.0
		9.65	2158	1.4
		9.80	1968	2.4
		10.00	1814	3.4
		10.40	1612	4.8
		11.00	1416	6.3
		12.00	1202	8.5
		13.00	1055	10.3
		14.00	943	12.0
		15.00	855	13.6
		16.00	782	15.1
		17.00	721	16.6
		18.00	668	18.1
		19.00	621	19.5
		20.00	580	21.0
		MHz	km	deg
	Back												17.5.2012