1
Introduction
1.1
Daily
meteorological operations
1.2
Monitoring
climate change
1.3
Defence
use
1.4
Other
users
2
Characteristics
of radiosonde operation
3
Radio-frequency
spectrum used in WMO operations
3.1
Results
from WMO survey
3.2
Radio-frequency
spectrum occupied in Europe
3.3
Radio-frequency
spectrum occupied in the United States of America
4
Operational
requirements
5
Future
trends
5.1
Very
strong upper winds
5.2
Manpower
efficiency resulting from highly automated systems
5.3
Low
radiosonde cost
5.4
Independence
from international NAVAID systems
5.5
Possible
improvements to spectrum occupation from improved radiosondes
6
Radiocommunication
characteristics of current radiosonde systems
6.1
Transmitter
characteristics
6.2
Ranging
signal
6.3
Receiving
antennas