Airborne television transmission
Abstract
The use of high-flying aircraft or captive balloons for airborne television transmission is discussed with reference to VHF reengineering. While the U.K. has no plans for reengineering at present, the conversion of the system that transmits 405-line black-and-white to a system that transmits 625-line color is possible in the future, and one approach would be to transfer 405-line transmission to captive balloons while the earth-based system is modified. The paper describes studies of propagation effects of transmitting from high-altitude aerials; tests were conducted at 224 MHz. Band III service area prediction, cochannel interference, and channel allocations are examined, and a plan for the United Kingdom is outlined. Approximate cost comparisons are presented for different methods of transmission.
- Publication:
-
BBC Engineering
- Pub Date:
- April 1978
- Bibcode:
- 1978BBCEn.......26H
- Keywords:
-
- Airborne Equipment;
- Aircraft Equipment;
- Television Transmission;
- Cost Analysis;
- Flight Tests;
- Frequency Assignment;
- General Aviation Aircraft;
- Ground Stations;
- Signal Transmission;
- Tethered Balloons;
- United Kingdom;
- Very High Frequency Radio Equipment;
- Communications and Radar