Policy
on Intellectual Property Right (IPR)
Annex 1� Table of Contents
�1���� Introduction
�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)
�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
�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