FINAL REPORT - Stakeholders - Ofcom

Airport
GNSS Aggregate EPFD limits
imposed by ITU on
RNSS signals, to
protect existing ARNS
allocations.
Marker
Beacon
The ITU modified
Radio Regulation
footnotes 5.329, 5.331
and established
Resolutions 608 and
610 (WRC-03) in
relation to the
protection of ARNS in
the bands 1215-1300
MHz.
Geographical
separation criteria
being looked at
between Galileo earth
stations and PSR
locations (WRC2000
Resolution 607).
Fixed services to be
discontinued in the
1559-1626.5 MHz
band after 2015.
ILS No decommissioning
planned in the
medium-term, due to
cost of MLS, and lack
of accuracy of GNSS
Landing Systems.
MLS Full allocation of MLS
is not taken. In-band
secondary uses are
already common.
Although GNSS is at
present being limited
to protect ARNS
allocations, the
strategic decision by
EUROCONTROL to
move towards GNSS
‘sole means’
navigation ensures
that any allocation to
GNSS will be primary
usage in the long
term future.
As such, although
currently RNSS has
constraints applied to
its signal (power
output); in the future
this may be reversed
(as PSR and DME
become secondary to
the need for a strong
RNSS signal in
aviation).
Major investment by
European bodies
means that lobbying
power will be strong.
Expect spectrum
requirements to
increase rapidly in the
long-term.
No regulation.
No change likely. No specific
requirements beyond
those applying to the
entire 108-117.975 MHz
band.
Dependent on takeup
of MLS in UK,
more secondary uses
could be allowed.
Table 3-13: Navaid Summary
3.4.6 Possible Improvements to existing technology
A decision may need to
be taken on whether to
keep 5150-5250 MHz
for possible MLS use,
or whether to limit the
frequency allocation for
the long-term.
3.4.6.1 Loran-C
Loran-C is represented in Europe by NELS – they have plans to develop Loran as a
communications channel for GNSS augmentation via a system known as Eurofix. This
provides a low-cost alternative to EGNOS. Although the data rate achievable with Eurofix
is low, it is sufficient to significantly improve the accuracy and integrity of the user’s
position fix as a GNSS augmentation fix.
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