Agreement between the United States Coast Guard of the Department of Transportation and the Dirección General de Aeronáutica Civil of Chile for the Establishment and Operation of an OMEGA Navigation System Signal Monitor
| Coming into Force | 05 September 1984 |
| Citation | UNTS v. 2130 (p.199) |
| Date of Conclusion | 05 September 1984,23 August 1984 |
| Registration Date | 12 December 2000 |
| Registration Number | 37127 |
| Subject Terms | Transport,Aviation |
| Type of Document | Bilateral |
| Participants | Chile,United States |
| Party Submitting the Application for Registration | United States of America |
No. 37127
United
States
of
America
and
Chile
Agreement
between
the United
States Coast
Guard
of
the
Department
of
Transportation
and the
Direcci6n
General
de
Aeronautica
Civil
of
Chile
for
the
Establishment
and
Operation
of
an
OMEGA
Navigation
System
Signal
Monitor.
Washington,
23
August
1984
and
Santiago,
5
September
1984
Entry
into
force:
5
September
1984
by
signature and
by
signature,
in
accordance
with
article
13
Authentic
texts:
English
and
Spanish
Registration
with
the
Secretariat
of
the
United Nations:
United States
ofAmerica,
12
December
2000
Etats-Unis
d'Amerique
et
Chili
Accord
entre
le
Service
des
garde-c6tes
du D6partement
des
transports
des
Ektats-Unis
et
ia
Direction
gqn~rale
de
l'A~ronautique
civile
du
Chili
concernant
l'tablissement
et
l'exploitation
d'une
station
de
surveillance
du
syst~me de
navigation
OMEGA.
Washington,
23
aofit
1984
et
Santiago,
5
septembre
1984
Entree
en
vigueur
:
5
septembre
1984
par
signature
et
par
signature,
conform
ment
b
l'article
13
Textes
authentiques
:
anglais
et
espagnol
Enregistrement
aupris
du
Secretariat
des
Nations
Unies :
Etats-Unis
d'Amdrique,
12
dkcembre
2000
Volume
2130,
1-3
7127
[
ENGLISH
TEXT
-
TEXTE
ANGLAIS
]
AGREEMENT
BETWEEN
THE
UNITED
STATES
COAST
GUARD
OF
THE
DEPARTMENT
OF
TRANSPORTATION AND
THE
DIRECCION
GEN-
ERAL
DE
AERONAUTICA
CIVIL
OF
CHILE
FOR
THE
ESTABLISH-
MENT
AND
OPERATION
OF AN
OMEGA
NAVIGATION
SYSTEM
SIGNAL MONITOR
1.
Purpose
The
purpose
of
this Agreement
is
to
establish
the
terms and conditions
under which
the
United
States
Coast
Guard
(the
"Coast
Guard")
represented
in
Chile
by
the
U.S.
Embassy,
and
the
Direcci6n
General
de
Aeroniutica
Civil,
hereinafter
referred
to
as
(DGAC)
shall
cooperate
in
the
establishment
and
operation
of
an
OMEGA
Navigation
System
Signal
Monitor
at
Mataveri
Airport
on
Easter
Island.
2.
Background
An
OMEGA
Signal
Monitor
is
an
unmanned,
low-level-of-effort
radio
receiver
used
to
collect signal
data from
OMEGA
Navigation System
transmitting
stations.
The OMEGA
System
is
an
international
network
of
eight globally distributed,
synchronized,
very-low-
frequency
(VLF)
transmitting
stations
which, when
supplemented
with
propagation
correc-
tions,
provides
a
medium-accuracy
(2-4
nautical miles) positioning/navigation aid
to
all
us-
ers.
The
eight transmitting
stations
are
now
in
operation through
cooperative
agreements
between
the
United
States
and
the
governments
of
Norway,
Liberia, France,
Argentina,
Australia,
and Japan.
The
conventional
mode
of
operation
is
hyperbolic.
The
system
can
also
be
used
in
other
modes,
such
as
"rho-rho"
and
differential
for
increased
accuracy. The
signals
have
also
been
used
in
precise
time
transfer
and for
frequency
control.
Based
on re-
cent
data, there
are
approximately
14,100
civil
aviation
and
marine users
throughout
the
world.
Due
to
its
international
civil
character, OMEGA
is
accepted
by
nations
all
over
the
world.
To determine propagation
corrections,
OMEGA
signal
data
is
collected
from
about
50
Signal
Monitors
located
around
the
world.
The
purpose
of
the
Signal
Monitors
is
to
collect
OMEGA signal
data
which
is
used
to
validate
predicted
OMEGA
signal
behaviour
in the
vicinity
of
the
monitor
and
as
data
input
to
a
global
propagation
model
used
to
determine
propagation
corrections.
Improved
propagation
corrections
mean better
position
fix accu-
racy
for
the
user.
An
OMEGA Signal
Monitor
is
an
unmanned,
low-level-of-effort, radio
receiver
used
to
collect
signal
data
from OMEGA
Navigation
System
transmitting
stations.
Although
data
collected
from
the
monitor
are
important,
they
do
not
directly affect the
transmission
of
OMEGA
signals.
Rather,
the
data
from
a
monitor
is
used
to
improve
posi-
tion
fix
accuracy
through
the
use
of
local
propagation
correction
applied to
the
received
OMEGA
signals.
The
OMEGA
Signal
Monitor
can
become
inoperable
for
periods
of
sev-
eral weeks
without
any
serious
effect on the
OMEGA
system.
Infrequent
equipment prob-
lems
can
usually
be
resolved
by
telephone
or
telex instructions
from
the
Coast
Guard.
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