AIM
4/3/14
4−5−20
Surveillance Systems
11.
Temperature Aloft − Text report − Computer
prepared forecasts, based on North American
Mesoscale (NAM) forecast model run, of temperat-
ure at specified times, altitudes, and locations.
REFERENCE
−
Advisory Circular AC
−00−45, “Aviation Weather Services.”
12.
Winds Aloft − Text report − Computer-
prepared forecasts, based on North American
Mesoscale (NAM) forecast model run, of wind
direction and wind speed at specified times, altitudes,
and locations.
REFERENCE
−
Advisory Circular AC
−00−45, “Aviation Weather Services.”
TBL 4
−5−2
FIS
−B Basic Product Update and Transmission Intervals
Product
FIS
−B Service
Update Interval
1
FIS
−B Service
Transmission Interval
2
AIRMET
As available
5 minutes
Convective SIGMET
As available
5 minutes
METAR/SPECI
Hourly/as available
5 minutes
NEXRAD Reflectivity (CONUS)
5 minutes
15 minutes
NEXRAD Reflectivity (Regional)
5 minutes
2.5 minutes
NOTAM−D/FDC
As available
10 minutes
PIREP
As available
10 minutes
SIGMET
As available
5 minutes
SUA Status
As available
10 minutes
TAF/AMEND
8 hours/as available
10 minutes
Temperature Aloft
6 hours
10 minutes
Winds Aloft
6 hours
10 minutes
1
The Update Interval is the rate at which the product data is available from the source.
2
The Transmission Interval is the amount of time within which a new or updated product transmission must be
completed and the rate or repetition interval at which the product is rebroadcast.
NOTE
−
Details concerning the content, format, and symbols of the various data link products provided should be obtained from
the specific avionics manufacturer.
4
−
5
−
10. Automatic Dependent
Surveillance
−
Rebroadcast (ADS
−
R)
ADS−R is a datalink translation function of the ADS−B
ground system required to accommodate the two separate
operating frequencies (978 MHz and 1090 ES). The
ADS−B system receives the ADS−B messages transmitted
on one frequency and ADS−R translates and reformats the
information for rebroadcast and use on the other frequency.
This allows ADS−B In equipped aircraft to see nearby
ADS−B Out traffic regardless of the operating link of the
other aircraft. Aircraft operating on the same ADS−B
frequency exchange information directly and do not
require the ADS−R translation function.