+ Visit NASA.gov + Contact NASA   + Home Collection > NASA  Author > Murphy, Timothy A.  Author > Stapleton, Brian P.  NASA Center > NASA (non Center Specific)  Publication Year > 1981-1990 > 1990  Subject > A-C > Communications And Radar  Availability Options > Online > PDF  Item/Media Type > Conference Paper  Note: Start a new navigation search by selecting a link above     Previous Record | Next Record + Back to Results   + Printer Friendly Title: Flight test of ARINC 741 configuration low gain SATCOM system on Boeing 747-400 aircraft Author(s): Murphy, Timothy A.; Stapleton, Brian P. Abstract: The Boeing company conducted a flight test of a SATCOM system similar to the ARINC 741 configuration on a production model 747-400. A flight plan was specifically designed to test the system over a wide variety of satellite elevations and aircraft attitudes as well as over land and sea. Interface bit errors, signal quality and aircraft position and navigational inputs were all recorded as a function of time. Special aircraft maneuvers were performed to demonstrate the potential for shadowing by aircraft structures. Both a compass rose test and the flight test indicated that shadowing from the tail is insignificant for the 747-400. However, satellite elevation angles below the aircraft horizon during banking maneuvers were shown to have a significant deleterious effect on SATCOM communications. NASA Center: NASA (non Center Specific) Publication Date: JAN 1, 1990 Document Source: CASI Online Source: View PDF File Document ID: 19920014854 Accession ID: 92N24097 Publication Information: JPL, California Inst. of Tech., Proceedings of the 2nd International Mobile Satellite Conference (IMSC 1990), p 157-162, Number of Pages = 6 Price Code: A02 Keywords: AIRBORNE EQUIPMENT; AIRCRAFT COMMUNICATION; ANTENNA ARRAYS; AVIONICS; BOEING 747 AIRCRAFT; COMMUNICATION SATELLITES; FLIGHT TESTS; AIRCRAFT MANEUVERS; ELEVATION ANGLE; FLIGHT PLANS; HIGH GAIN; Notes: In JPL, California Inst. of Tech., Proceedings of the 2nd International Mobile Satellite Conference (IMSC 1990) p 157-162 (SEE N92-24071 15-32) Accessibility: Unclassified; No Copyright; Unlimited; Publicly available; Updated/Added to NTRS: 2008-06-01 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007