KAIRA EISCAT VHF intersection heights/elevations

In order for the KAIRA beam to intersect the vertical EISCAT VHF transmitter beam, the elevation must be set as follows.  (All data provided by I.I.Virtanen, U. Oulu).

Note that the azimuth to the EISCAT VHF is 313.95 degrees. The numbers for the above plots are as follows. Hgt is the height above the EISCAT VHF transmitter in kilometres and Elev is the require elevation of observation from KAIRA to have the beam centre at this height.

Hgt	Elev	Hgt	Elev	Hgt	Elev
0	-0.735	670	82.155	1340	85.69
10	6.101	680	82.259	1350	85.717
20	12.747	690	82.359	1360	85.743
30	19.044	700	82.457	1370	85.768
40	24.881	710	82.552	1380	85.793
50	30.199	720	82.644	1390	85.818
60	34.987	730	82.734	1400	85.843
70	39.261	740	82.821	1410	85.867
80	43.06	750	82.906	1420	85.891
90	46.431	760	82.989	1430	85.914
100	49.423	770	83.07	1440	85.937
110	52.082	780	83.148	1450	85.96
120	54.451	790	83.225	1460	85.982
130	56.568	800	83.3	1470	86.005
140	58.467	810	83.373	1480	86.027
150	60.176	820	83.444	1490	86.048
160	61.719	830	83.513	1500	86.069
170	63.117	840	83.581	1510	86.09
180	64.39	850	83.648	1520	86.111
190	65.551	860	83.712	1530	86.132
200	66.613	870	83.776	1540	86.152
210	67.589	880	83.837	1550	86.172
220	68.488	890	83.898	1560	86.192
230	69.318	900	83.957	1570	86.211
240	70.087	910	84.015	1580	86.23
250	70.801	920	84.072	1590	86.249
260	71.465	930	84.127	1600	86.268
270	72.084	940	84.181	1610	86.287
280	72.663	950	84.234	1620	86.305
290	73.205	960	84.286	1630	86.323
300	73.714	970	84.337	1640	86.341
310	74.192	980	84.387	1650	86.358
320	74.642	990	84.436	1660	86.376
330	75.067	1000	84.484	1670	86.393
340	75.468	1010	84.531	1680	86.41
350	75.847	1020	84.577	1690	86.427
360	76.207	1030	84.622	1700	86.443
370	76.548	1040	84.667	1710	86.46
380	76.872	1050	84.71	1720	86.476
390	77.18	1060	84.753	1730	86.492
400	77.473	1070	84.795	1740	86.508
410	77.752	1080	84.836	1750	86.523
420	78.019	1090	84.876	1760	86.539
430	78.274	1100	84.916	1770	86.554
440	78.518	1110	84.955	1780	86.569
450	78.751	1120	84.993	1790	86.584
460	78.974	1130	85.031	1800	86.599
470	79.188	1140	85.067	1810	86.614
480	79.394	1150	85.104	1820	86.628
490	79.591	1160	85.139	1830	86.643
500	79.781	1170	85.174	1840	86.657
510	79.963	1180	85.209	1850	86.671
520	80.139	1190	85.243	1860	86.685
530	80.308	1200	85.276	1870	86.698
540	80.471	1210	85.309	1880	86.712
550	80.628	1220	85.341	1890	86.725
560	80.78	1230	85.373	1900	86.739
570	80.927	1240	85.404	1910	86.752
580	81.068	1250	85.435	1920	86.765
590	81.205	1260	85.465	1930	86.778
600	81.337	1270	85.495	1940	86.79
610	81.466	1280	85.524	1950	86.803
620	81.59	1290	85.553	1960	86.815
630	81.71	1300	85.581	1970	86.828
640	81.826	1310	85.609	1980	86.84
650	81.939	1320	85.636	1990	86.852
660	82.049	1330	85.664	2000	86.864

We hope you read all these numbers and memorised them!