Annex 1
1 Introduction
1.1 Daily
meteorological operations
1.2 Monitoring
climate change
1.3 Other
users
2 Characteristics
of radiosonde operation
3 Radio-frequency
spectrum used in operations for WMO reporting
3.1 Results
from WMO survey
3.2 Radio-frequency
spectrum used in Western and Northern Europe
3.3 Radio-frequency
spectrum used in North and South America
4 Operational
requirements
5 Future
spectrum requirements
5.1 Very
strong upper winds
5.2 Manpower
efficiency resulting from highly automated systems
5.3 Issues
related to the cost of radiosondes
5.4 Independence
from international NAVAID systems
5.5 Spectrum
congestion
5.6 Current
improvement of spectrum efficiency
5.7 Error
detection/correction
6 MetAids availability requirements
6.1 Propagation
conditions
6.2 Critical
periods of flight
6.3 Synoptic
operations radiosonde data availability requirements
6.3.1 Radiosonde systems operated in 403 MHz band
6.3.2 Older radiosonde systems operated in the 1 680 MHz band
6.3.3 Newer systems operated in the 1 680 MHz band
6.4 Summary
of data availability requirements
7 Radiocommunication
characteristics of current radiosonde systems
7.1 Transmitter
characteristics
7.2 Receiving systems
7.2.1 403 MHz band
7.2.2 1 680 MHz band
8 Radiocommunication
characteristics of dropsonde systems
8.1 Operational
practices for dropsondes
8.2 Dropsonde
system characteristics
8.3 Dropsonde future plans
9 Radiocommunication
characteristics of rocketsonde systems
9.1 Operational
practices for rocketsondes
9.2 Rocketsonde
system characteristics
9.3 Rocketsonde descent profile