OH1TV   OH1O   OH1WX
	Minimum distance between stations during F2 contact as function of  foF2
	F2-layer height assumed to be 250km
		foF2	d	TOA
		13.62	3520	0.0
		13.68	3175	1.6
		13.80	2965	2.7
		14.00	2750	3.9
		14.50	2425	5.9
		15.00	2210	7.5
		16.00	1915	10.0
		17.00	1705	12.2
		18.00	1545	14.1
		19.00	1410	16.0
		20.00	1300	17.7
		MHz	km	deg
	Back												24.5.2012