Honeywell International Inc. 9PGTPL-100A Benutzerhandbuch
Page 9
1 Mar 2006
34-45-54
MAINTENANCE MANUAL
TPL-100A Processor / Part No. 940-0530-001
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
(1) UF19 Messages
Military Mode S formats are needed to help:
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Normal daily operations in civil airspace
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Military training operations outside of high-density airspace
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Stop all unprotected transmissions.
There are situations in which military operations benefit from a military Mode S format.
The benefit is to not disclose aircraft data to unauthorized users. In these cases, a data
protected military Mode S up-link/down-link format helps military operations.
The benefit is to not disclose aircraft data to unauthorized users. In these cases, a data
protected military Mode S up-link/down-link format helps military operations.
The MILACAS-FR Mode S data link addresses the need for private communication. It
supports transmission and reception of data between formation aircraft. The
MILACAS-FR system transmits and receives position, velocity, flight commands and
other information using the DF19 extended squitter.
supports transmission and reception of data between formation aircraft. The
MILACAS-FR system transmits and receives position, velocity, flight commands and
other information using the DF19 extended squitter.
Range and bearing measurements are derived by actively interrogating aircraft. For
hybrid/passive surveillance use, it is necessary to make sure extended squitter content
is correct. If DF19s are used for military applications, it is necessary to make sure the
DF19 content is correct.
hybrid/passive surveillance use, it is necessary to make sure extended squitter content
is correct. If DF19s are used for military applications, it is necessary to make sure the
DF19 content is correct.
The use of UF0 can cause an ambiguity (since transponders reply to a UF0 with a
DF0). Use UF19 insted of UF0 to eliminate ambiguity. For military applications, UF19
transmissions trigger a DF19 response for validation. Each UF19 transmission has the
Mode S address as the aircraft identifier which selectively interrogates the aircraft of
interest.
DF0). Use UF19 insted of UF0 to eliminate ambiguity. For military applications, UF19
transmissions trigger a DF19 response for validation. Each UF19 transmission has the
Mode S address as the aircraft identifier which selectively interrogates the aircraft of
interest.
For a variety of military operations, data security techniques are used to protect the
data contained in the up-link/down-link (UF19/DF19) formats. It is not appropriate to
use these techniques on standard formats dedicated for civil use.
data contained in the up-link/down-link (UF19/DF19) formats. It is not appropriate to
use these techniques on standard formats dedicated for civil use.
In the MILACAS-FR implementation, UF19 interrogation rates change and depend on
the distance between aircraft. For close-in aircraft, interrogation rates are not above 2
Hz. For aircraft at longer distances (approximately 5 nautical miles), average
interrogation rates do not exceed 1 per second.
the distance between aircraft. For close-in aircraft, interrogation rates are not above 2
Hz. For aircraft at longer distances (approximately 5 nautical miles), average
interrogation rates do not exceed 1 per second.
The UF19 transmissions have power levels set with an algorithm consistent with TCAS
II DO-185A MOPS. Due to the distance between aircraft in formation, the minimum
power used is lower than the minimum requirement defined in the MOPS. Power levels
must be in the 10-50 Watt range to lower unwanted interference outside of the
formation. UF19 interrogations are used in the interference limiting calculations.
II DO-185A MOPS. Due to the distance between aircraft in formation, the minimum
power used is lower than the minimum requirement defined in the MOPS. Power levels
must be in the 10-50 Watt range to lower unwanted interference outside of the
formation. UF19 interrogations are used in the interference limiting calculations.
Long interrogations are better than short interrogations. The use of long military Mode
S formats gives an essential improvement over existing military modes. Because of the
data-link capability of Mode S, a long Mode S reply format consists of 112 bits:
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S formats gives an essential improvement over existing military modes. Because of the
data-link capability of Mode S, a long Mode S reply format consists of 112 bits:
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Eight bits identify the format within a Mode S message.
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104 bits are available for the data content.
Data content is protected using data protection techniques.