Policy on Intellectual Property Right (IPR)
Annex 1� Table of Contents
�1���� Introduction
PART 1� Frequency availability
�2���� Location of control points
�3���� Basic and operational maximum
usable frequencies
������� 3.1���� Basic maximum usable
frequencies
������� 3.2 ����E-layer critical frequency (foE)
������� 3.3���� E-layer basic MUF
������� 3.4���� F2-layer
characteristics
������� 3.5���� F2-layer basic MUF
����������������� 3.5.1���� Lowest-order
mode
����������������� 3.5.2���� Higher-order
modes (paths up to 9 000 km)
������� 3.6���� Within the month
probability of ionospheric propagation support
������� 3.7���� The path operational
MUF
�4���� E-layer maximum screening
frequency (fs)
PART 2� Median sky-wave field strength
�5���� Median sky-wave field strength
������� 5.1���� Elevation angle
������� 5.2���� Paths up to 9 000
km
����������������� 5.2.1���� Modes
considered
����������������� 5.2.2���� Field
strength determination
������� 5.3���� Paths longer than 7 000 km
����������������� 5.3.1���� Determination
of the fM
����������������� 5.3.2���� Determination of the fL
����������������� 5.3.3���� Estimation
of the field strength Etl
������� 5.4���� Paths between
7 000 and 9 000 km
�6���� Median available receiver power
PART 3� The prediction of system
performance
�7���� Monthly median signal-to-noise
ratio
�8���� Sky-wave field strength,
available receiver signal power and signal-to‑noise ratios for other
percentages of time
�9���� Lowest usable frequency (LUF)
10���� Basic circuit reliability (BCR)
������ 10.1���� The reliability of
analogue modulated systems
������ 10.2���� The reliability of
digitally modulated systems, taking account of the time and frequency spreading
of the received signal
����������������� 10.2.1���� System
parameters
����������������� 10.2.2���� Time
delay
����������������� 10.2.3���� Reliability
prediction procedure
For path lengths up to 9 000 km:
For path lengths beyond 9 000 km:
������ 10.3���� Equatorial scattering
Attachment 1� to Annex 1� A model for equatorial scattering of HF signals