The frequency band 1087.7-1092.3 MHz is
currently being utilized for the transmission of
ADS-B signals from aircraft to terrestrial
stations within line-of-sight. The World Radio
Communication Conference (WRC-15) has now
allocated this frequency band in the
Earth-to-space direction to enable transmissions
from aircraft to satellites.
This extends ADS-B signals beyond line-of-sight
to facilitate reporting the position of aircraft
equipped with ADS-B anywhere in the world,
including oceanic, polar and other remote areas.
recognized that as the standards and recommended
practices (SARP) for systems enabling position
determination and tracking of aircraft are
developed by the International Civil Aviation
Organization (ICAO), the performance criteria
for satellite reception of ADS-B signals will
also need to be addressed by ICAO.
In its special meeting on global flight
tracking, which took place in Montréal, 12-13
May 2014, ICAO encouraged ITU to take urgent
action to provide the necessary spectrum
allocations for satellites to support emerging
aviation needs. In October 2014, the ITU
Plenipotentiary Conference meeting in Busan, Republic of Korea, instructed WRC-15 to consider
global flight tracking in its agenda.