21. The mean errors were no more than 120-m in range and 0.8-degrees in azimuth and elevation angles . 22. The farther the distance to the intended target, the greater the elevation angle and the higher the apex. 23. What was needed were range and accuracy trials to determine the actual relationship between range and elevation angle . 24. This required ways to measure elevation angles and know the relationship between the elevation angle and the range. 25. This required ways to measure elevation angles and know the relationship between the elevation angle and the range. 26. The other main difference in sighting arrangements was the use of an elevation angle or alternatively the range. 27. This component is negligible in small elevation angles , but must be taken into account for higher scanning angles. 28. Tundra and Molniya orbits are used to provide high latitude users with higher elevation angles than a geostationary orbit. 29. While providing early warning, these sets suffered from the deficiency of not providing target height ( elevation angle ). 30. The open turret had advantages, such as high elevation angle , excellent visibility for the gunners and no need for ventilation.