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circumstances.
7.3.1 FAA FISDL (VHF) service provides, free of
charge, the following basic text products:
7.3.1.1 Aviation Routine Weather Reports
(METARs).
7.3.1.2 Aviation Selected Special Weather Reports
(SPECIs).
7.3.1.3 Terminal Area Forecasts (TAFs), and their
amendments.
7.3.1.4 Significant Meteorological Information
(SIGMETs).
7.3.1.5 Convective SIGMETs.
7.3.1.6 Airman's Meteorological Information
(AIRMETs).
7.3.1.7 Pilot Reports (both urgent and routine)
(PIREPs); and,
7.3.1.8 Severe Weather Forecast Alerts and Warnings
(AWWs/WW) issued by the NOAA Storm
Prediction Center (SPC).
7.3.2 The format and coding of these text products
are described in Advisory Circular AC-00-45,
Aviation Weather Services, and FIG GEN 3.5-23
and FIG GEN 3.5-24, Key to Aerodrome Forecast
(TAF) and Aviation Routine Weather Report
(METAR).
7.3.3 Additional products, called “Value-Added
Products,” are also available from the vendor on a
paid subscription basis. Details concerning the
30 AUG 07
AIP
United States of America
GEN 3.5-23
15 MAR 07
Federal Aviation Administration Nineteenth Edition
content, format, symbology and cost of these
products may be obtained from the vendor.
7.4 FAA's Flight Information Service-Broadcast
(FIS-B) Service. FIS-B is a ground broadcast
service provided through the FAA's Universal Access
Transceiver (UAT) “ADS-B Broadcast Services”
network. The UAT network is an ADS-B data link
that operates on 978 MHz. The FAA FIS-B system
provides pilots and flight crews of properly equipped
aircraft with a cockpit display of certain aviation
weather and flight operational information. The
FAA's FIS-B service is being introduced in certain
regional implementations within the NAS (e.g., in
Alaska and in other areas of implementation).
7.4.1 FAA's UAT FIS-B provides the initial products
listed below with additional products planned for
future implementation. FIS-B reception is line of
sight and can be expected within 200 NM (nominal
range) of each ground transmitting site. The
following services are provided free of charge.
7.4.1.1 Text: Aviation Routine Weather Reports
(METARs).
7.4.1.2 Text: Special Aviation Reports (SPECIs).
7.4.1.3 Text: Terminal Area Forecasts (TAFs), and
their amendments.
7.4.1.4 Graphic: NEXRAD precipitation maps.
7.4.2 The format and coding of the above text
weather-related products are described in Advisory
Circular AC-00-45, Aviation Weather Services, and
FIG GEN 3.5-23 and FIG GEN 3.5-24, Key to
Aerodrome Forecast (TAF) and Aviation Routine
Weather Report (METAR).
7.4.3 Details concerning the content, format, and
symbology of the various data link products provided
may be obtained from the specific avionics
manufacturer.
7.5 Non-FAA FISDL Systems. Several commercial
vendors also provide customers with FIS data
over both the aeronautical spectrum and on other
frequencies using a variety of data link protocols. In
some cases, the vendors provide only the communications
system that carries customer messages,
such as the Aircraft Communications Addressing and
Reporting System (ACARS) used by many air carrier
and other operators.
7.5.1 Operators using non-FAA FIS data for inflight
weather and other operational information should
ensure that the products used conform to FAA/NWS
standards. Specifically, aviation weather and NAS
status information should meet the following criteria:
7.5.1.1 The products should be either FAA/NWS
“accepted” aviation weather reports or products, or
based on FAA/NWS accepted aviation weather
reports or products. If products are used which do not
meet this criteria, they should be so identified. The
operator must determine the applicability of such
products to their particular flight operations.
7.5.1.2 In the case of a weather product which is the
result of the application of a process which alters the
form, function or content of the base FAA/NWS
accepted weather product(s), that process, and any
limitations to the application of the resultant product,
should be described in the vendor's user guidance
material.
7.5.2 An example would be a NEXRAD radar
composite/mosaic map, which has been modified by
changing the scaling resolution. The methodology of
assigning reflectivity values to the resultant image
components should be described in the vendor's
guidance material to ensure that the user can
accurately interpret the displayed data.
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