46
Weather
a nd
T FR
I nformation
( USA
s eulement)
When
c onnected
t o
a n
S V-‐ADSB-‐470
m odule,
S kyView
c an
d isplay
N EXRAD
w eather
a nd
Temporary
f light
R estriction
( TFR)
i nformation
v isually
o n
t he
S kyView
m ap
p age.
A dditionally,
textual
M ETAR
a nd
T AF
w eather
r eports
a re
a vailable
f or
a irports
t hat
r eport
s uch
i nformation.
The
S V-‐ADSB-‐470
r eceives
t raffic
a nd
w eather
v ia
t he
9 78
M Hz
U AT
A DS-‐B
frequencies,
w hich
a re
o nly
u tilized
b y
t he
F AA's
A DS-‐B
s ystem.
T herefore,
t raffic
and
w eather
a re
o nly
a vailable
i n
t he
U S
( and
o ther
p laces
t he
F AA
m ay
h ave
A DS-‐B
ground
s tations,
i ncluding
G uam,
P uerto
R ico,
a nd
t he
U S
V irgin
I slands).
T he
S V-‐
ADSB-‐470
w ill
n ot
w ork
o utside
t hese
a reas.
Weather
i nformation
i s
t ransmitted
c ontinuously
o ver
a
d ata
l ink
f rom
t he
g round,
but
r eception
o f
w eather
d ata
i s
d ependent
o n
A DS-‐B
g round
s tation
proximity/coverage,
s ignal
s trength,
a nd
o ther
e nvironmental
c onditions.
Therefore,
A DS-‐B
w eather
r eception
m ay
n ot
b e
c ontinuous.
Due
t o
l atencies
t hat
a ccumulate
w hile
N EXRAD
w eather
i mages
a re
c reated,
a nd
the
w ay
t hat
t he
F IS-‐B/NEXRAD
s ervices
t imestamp
w eather
d ata,
N EXRAD
i mages
are
a ctually
A LWAYS
o lder
t han
t he
a ge
i ndicated
o n
t he
d isplay.
I n
e xtreme
c ases,
this
c an
m ean
t hat
t he
i mages
y ou
s ee
o n
S kyView
m ay
b e
1 5-‐20
m inutes
o lder
than
t he
a ge
i ndicated
b y
S kyView.
S ee
http://www.ntsb.gov/doclib/safetyalerts/SA_017.pdf
f or
f urther
i nformation
a bout
this
p henomenon.
Never
r ely
o n
N EXRAD
i magery
t o
t ry
t o
" squeeze"
t hrough
a
w eather
s ystem.
Often,
d eadly
t urbulence
a nd
w ind
s hear
a re
p resent,
e ven
i n
p laces
i n
s torm
systems
w here
t here
i s
n o
p recipitation
i ndicated.
The
W eather
a nd
T FR
i nformation
t hat
S kyView
p rovides
i s
s upplemental
information
o nly.
I t
s hould
n ot
b e
u sed
a s
y our
p rimary
m eans
o f
w eather
information.
O nly
o fficial
F AA
b riefing
i nformation
s ources
s hould
b e
u sed
t o
m ake
critical
a eronautical
w eather
d ecisions.
SV-‐ADSB-‐470
W eather
C apabilities
( US
O nly)
The
F AA's
n etwork
o f
A DS-‐B
g round
s tations
c ontinuously
t ransmits
w eather
a nd
o ther
information
s uch
a s
T FRs
v ia
a
9 78
M Hz
U AT
B and
A DS-‐B
d ata
l ink.
T he
S V-‐ADSB-‐470
m odule
can
r eceive
t his
i nformation,
a nd
c urrently
s upports
t he
f ollowing
F IS-‐B
s ervices
a nd
p roducts.
Future
u pdates
t o
S kyView
w ill
s upport
a dditional
F IS-‐B
p roducts.
METARs
( Aviation
R outine
W eather
R eports)
Routine
w eather
r eports
a t
a irports
t hat
a re
u pdated
a t
l east
h ourly.
S PECI
( aviation
s pecial
weather
r eport)
i nformation
t hat
a ugments
M ETAR
i nformation
d uring
t imes
o f
s ignificant
weather
d eterioration
o r
i mprovement
a re
a ggregated
i nto
S kyView's
w eather
r eporting
capability.
Manuel
d 'utilisation
-‐
R évision
M
Utilisation
d u
l ogiciel
d e
c arte
e t
d e
n avigation
Logiciel
C arte
e t
N avigation
46