The Category IIIA ILS guidance system is designed to provide a VHF/UHF localizer and glide slope with increased performance and a backup capability. The overall flyability of the systems must be superior to a Category I or II system due to the lower minimums (700 feet RVR) authorized for the approach. Since the radiated signal is in the UHF/VHF frequency band, it is subject to the same errors and limitations caused by ground or airborne vehicles. The success, then, of a Category IIIA approach depends on the control of interference factors and capability of the aircraft and pilot to maintain the localizer and glide path. (Author)
Dulles Category IIIA ILS Evaluation
1972
19 pages
Report
No indication
English
SAE Technical Papers | 1959
|Online Contents | 1994
Engineering Index Backfile | 1959
|Dulles International Airport Access
NTIS | 1970
|Dulles International Airport Construction Challenges
British Library Conference Proceedings | 1994
|