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Output and performance measures
2 Short Wave Audibility
Short Wave Audibility (overall percentage scores)
March
2000
Actual
March
2001
Target
March
2001
Actual
Global
81
81
80
Africa and the Middle East
86
86
82
Americas
63
70
65
Asia and the Pacific
79
79
79
EurAsia
81
81
82
Europe
85
85
82
The audibility measurement is based on regular ratings of the best 成人论坛 World Service short-wave frequency in any given area. A weighted average score for each language and region is calculated and expressed as a percentage: 100% represents outstanding, while 70% is good-quality audibility. In practice, variations of up to 5% will not have a significant effect and the impact of even a 10% change will only be moderate.
Variations in short-wave propagation are inevitable because of changing ionospheric conditions. Unusual solar activity throughout 2000/01 may have exaggerated this effect.
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