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Appendix 1 to AMC1 SERA.6005(c) Requirements for communications, SSR transponder and electronic conspicuity in U-space airspace
Available versions for ERULES-1963177438-20351
ED Decision 2022/024/R
found in: SERA (923/2012) Standardised European Rules of the Air (Dec 2024)
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Appendix 1 to AMC1 SERA.6005(c) Requirements for communications, SSR transponder and electronic conspicuity in U-space airspace ED Decision 2022/024/R ADS-L MESSAGE GENERATION FUNCTION (a) This AMC details the minimum set of parameters that should be transmitted, and a set of parameters that may be optionally transmitted. (b) All parameters should originate from a position source or from the system configuration. Each ADS-L message should include an identifier unique to the transmission source.  Figure 1: The scope of the ADS-L message generation function (dashed line) as specified in Appendix 1 to AMC1 to SERA.6005(c) TRANSMITTED PARAMETERS <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td valign="top" width="103"><p>Data type</p></td><td valign="top" width="132"><p>Parameter</p></td><td valign="top" width="76"><p>Required/optional</p></td><td valign="top" width="151"><p>Remarks</p></td><td valign="top" width="142"><p>Source</p></td></tr><tr><td rowspan="2" valign="top" width="103"><p>Aircraft address</p></td><td valign="top" width="132"><p>Unique identifier / address</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>Should be included in each transmission</p></td><td valign="top" width="142"><p>Configuration</p></td></tr><tr><td valign="top" width="132"><p>Address type</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p> See the table below</p></td><td valign="top" width="142"><p>Configuration</p></td></tr><tr><td valign="top" width="103"><p>Time</p></td><td valign="top" width="132"><p>Timestamp</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="103"><p>Aircraft identification</p></td><td valign="top" width="132"><p>Aircraft category</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>See the table below</p></td><td valign="top" width="142"><p>Configuration</p></td></tr><tr><td valign="top" width="103"><p>Emergency status</p></td><td valign="top" width="132"><p>Emergency status</p></td><td valign="top" width="76"><p>Optional</p></td><td valign="top" width="151"><p>See the table below</p></td><td valign="top" width="142"><p>Pilot-in-command inputs</p></td></tr><tr><td rowspan="3" valign="top" width="103"><p>Position</p></td><td valign="top" width="132"><p>Latitude</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>Reference WGS-84</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>Longitude</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>Reference WGS-84</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>GNSS altitude</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>Reference WGS-84<br/> Height Above Ellipsoid (HAE)</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td rowspan="3" valign="top" width="103"><p>Velocity/track</p></td><td valign="top" width="132"><p>Ground speed</p></td><td valign="top" width="76"><p>Required</p></td><td rowspan="2" valign="top" width="151"><p>Alternatively, north-south, east-west velocities</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>Ground track</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>Vertical rate</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="103"></td><td valign="top" width="132"><p>Velocity accuracy</p></td><td valign="top" width="76"><p>Optional</p></td><td valign="top" width="151"><p>See the table below</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td rowspan="6" valign="top" width="103"><p>Capabilities and status</p></td><td valign="top" width="132"><p>Version</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>To facilitate interoperability</p></td><td valign="top" width="142"><p>Configuration</p></td></tr><tr><td valign="top" width="132"><p>Design assurance</p></td><td valign="top" width="76"><p>Optional</p></td><td valign="top" width="151"><p>See the table below</p></td><td valign="top" width="142"><p>Configuration</p></td></tr><tr><td valign="top" width="132"><p>Horizontal position accuracy</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>95 % confidence<br/> See table below</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>Vertical position accuracy</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>95 % confidence<br/> See the table below</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>Navigation integrity</p></td><td valign="top" width="76"><p>Optional</p></td><td valign="top" width="151"><p>Containment radius (Rc) <br/> See table below</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>Source integrity level</p></td><td valign="top" width="76"><p>Optional</p></td><td valign="top" width="151"><p>Probability that Rc is exceeded<br/> See the table below </p></td><td valign="top" width="142"><p>Configuration</p></td></tr></table> TABLES FOR REQUIRED PARAMETERS <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td nowrap="" valign="top" width="208"><p>Data type</p></td><td valign="top" width="396"><p>Values</p></td></tr><tr><td nowrap="" rowspan="4" valign="top" width="208"><p>Address type</p></td><td nowrap="" valign="top" width="396"><p>Reserved</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>ICAO</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Unique identifier</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Reserved</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td valign="top" width="396"><p>Values</p></td></tr><tr><td nowrap="" rowspan="17" valign="top" width="208"><p>Aircraft category</p></td><td nowrap="" valign="top" width="396"><p>No emitter category information available</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Light fixed-wing (<7 031 kg / 15 500 lb)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Small to heavy fixed-wing (≥7 031 kg / 15 500 lb)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Light rotorcraft</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Heavy rotorcraft</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Glider/sailplane</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Lighter-than-air</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Ultralight</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Hang-glider</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Paraglider</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Parachutist/skydiver/wingsuit</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>eVTOL/UAM</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>UAS ‘open’ category</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>UAS ‘specific’ category</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>UAS ‘certified’ category</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Model plane</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Reserved</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td nowrap="" valign="top" width="396"><p>95 % horizontal accuracy bound</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU ≥ 926 m (0.5 NM)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 926 m (0.5 NM)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 555.6 m (0.3 NM)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 185.2 m (0.1 NM)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 92.6 m (0.05 NM)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 30 m</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 10 m</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 3 m</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="595"><tr><td nowrap="" valign="top" width="208"><p>Data type</p></td><td nowrap="" valign="top" width="387"><p>95 % geometric altitude accuracy</p></td></tr><tr><td nowrap="" rowspan="4" valign="top" width="208"><p>Vertical position accuracy </p></td><td nowrap="" valign="top" width="387"><p>Unknown or > 150 m</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>≤ 150 m</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>≤ 45 m</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>≤ 15 m</p></td></tr></table> TABLES FOR OPTIONAL PARAMETERS <table border="1" cellpadding="0" cellspacing="0" width="595"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td valign="top" width="387"><p>Values</p></td></tr><tr><td nowrap="" rowspan="8" valign="top" width="208"><p>Emergency status</p></td><td nowrap="" valign="top" width="387"><p>No emergency</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>General emergency</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>Lifeguard/medical emergency</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>Minimum fuel (Energy)</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>No communications</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>Unlawful interference</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>Downed aircraft</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>Reserved</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="595"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td valign="top" width="387"><p>Horizontal Figure of Merit for rate (HFOMr) values</p></td></tr><tr><td nowrap="" rowspan="4" valign="top" width="208"><p>Velocity accuracy</p></td><td nowrap="" valign="top" width="387"><p>Unknown or ≥ 10 m/s</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 10 m/s</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 3 m/s</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 1 m/s</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="595"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td valign="top" width="387"><p>Software and hardware DAL</p></td></tr><tr><td nowrap="" rowspan="4" valign="top" width="208"><p>Design assurance</p></td><td nowrap="" valign="top" width="387"><p>n/a</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>D</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>C</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>B</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="595"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td nowrap="" valign="top" width="387"><p>Rc</p></td></tr><tr><td rowspan="12" valign="top" width="208"><p>Navigation integrity</p></td><td nowrap="" valign="top" width="387"><p>≥ 20 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 20 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 8 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 4 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 2 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 1 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 0.6 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 0.2 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 0.1 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 75 m</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 25 m</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 7.5 m</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="595"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td valign="top" width="387"><p>Probability of exceeding Rc</p></td></tr><tr><td nowrap="" rowspan="4" valign="top" width="208"><p>Source integrity level</p></td><td nowrap="" valign="top" width="387"><p>Unknown or > 1E-3 / FH</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>≤ 1E-3 / FH</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>≤ 1E-5 / FH</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>≤ 1E-7 / FH</p></td></tr></table> TRANSMISSION RATE The *position* and *velocity/track* parameters should be transmitted at a rate of at least 1 Hz. The transmission of other parameters may be less frequent than 1 Hz, but not less frequent than 0.1 Hz. ERROR CONTROL There should be at least a digital error detection technique at one level of the transmission (e.g. cyclic redundancy check (CRC)). No specific error-control means are prescribed. SECURITY The transmission should be protected to ensure security and confidentiality of the exchanged parameters. POSITION SOURCE The *horizontal and vertical position* and *velocity/track* parameters should primarily be based on a GNSS source.
Appendix 1 to AMC1 SERA.6005(c) Requirements for communications, SSR transponder and electronic conspicuity in U-space airspace ED Decision 2022/024/R ADS-L MESSAGE GENERATION FUNCTION (a) This AMC details the minimum set of parameters that should be transmitted, and a set of parameters that may be optionally transmitted. (b) All parameters should originate from a position source or from the system configuration. Each ADS-L message should include an identifier unique to the transmission source.  Figure 1: The scope of the ADS-L message generation function (dashed line) as specified in Appendix 1 to AMC1 to SERA.6005(c) TRANSMITTED PARAMETERS <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td valign="top" width="103"><p>Data type</p></td><td valign="top" width="132"><p>Parameter</p></td><td valign="top" width="76"><p>Required/optional</p></td><td valign="top" width="151"><p>Remarks</p></td><td valign="top" width="142"><p>Source</p></td></tr><tr><td rowspan="2" valign="top" width="103"><p>Aircraft address</p></td><td valign="top" width="132"><p>Unique identifier / address</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>Should be included in each transmission</p></td><td valign="top" width="142"><p>Configuration</p></td></tr><tr><td valign="top" width="132"><p>Address type</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p> See the table below</p></td><td valign="top" width="142"><p>Configuration</p></td></tr><tr><td valign="top" width="103"><p>Time</p></td><td valign="top" width="132"><p>Timestamp</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="103"><p>Aircraft identification</p></td><td valign="top" width="132"><p>Aircraft category</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>See the table below</p></td><td valign="top" width="142"><p>Configuration</p></td></tr><tr><td valign="top" width="103"><p>Emergency status</p></td><td valign="top" width="132"><p>Emergency status</p></td><td valign="top" width="76"><p>Optional</p></td><td valign="top" width="151"><p>See the table below</p></td><td valign="top" width="142"><p>Pilot-in-command inputs</p></td></tr><tr><td rowspan="3" valign="top" width="103"><p>Position</p></td><td valign="top" width="132"><p>Latitude</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>Reference WGS-84</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>Longitude</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>Reference WGS-84</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>GNSS altitude</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>Reference WGS-84<br/> Height Above Ellipsoid (HAE)</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td rowspan="3" valign="top" width="103"><p>Velocity/track</p></td><td valign="top" width="132"><p>Ground speed</p></td><td valign="top" width="76"><p>Required</p></td><td rowspan="2" valign="top" width="151"><p>Alternatively, north-south, east-west velocities</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>Ground track</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>Vertical rate</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="103"></td><td valign="top" width="132"><p>Velocity accuracy</p></td><td valign="top" width="76"><p>Optional</p></td><td valign="top" width="151"><p>See the table below</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td rowspan="6" valign="top" width="103"><p>Capabilities and status</p></td><td valign="top" width="132"><p>Version</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>To facilitate interoperability</p></td><td valign="top" width="142"><p>Configuration</p></td></tr><tr><td valign="top" width="132"><p>Design assurance</p></td><td valign="top" width="76"><p>Optional</p></td><td valign="top" width="151"><p>See the table below</p></td><td valign="top" width="142"><p>Configuration</p></td></tr><tr><td valign="top" width="132"><p>Horizontal position accuracy</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>95 % confidence<br/> See table below</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>Vertical position accuracy</p></td><td valign="top" width="76"><p>Required</p></td><td valign="top" width="151"><p>95 % confidence<br/> See the table below</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>Navigation integrity</p></td><td valign="top" width="76"><p>Optional</p></td><td valign="top" width="151"><p>Containment radius (Rc) <br/> See table below</p></td><td valign="top" width="142"><p>Position source</p></td></tr><tr><td valign="top" width="132"><p>Source integrity level</p></td><td valign="top" width="76"><p>Optional</p></td><td valign="top" width="151"><p>Probability that Rc is exceeded<br/> See the table below </p></td><td valign="top" width="142"><p>Configuration</p></td></tr></table> TABLES FOR REQUIRED PARAMETERS <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td nowrap="" valign="top" width="208"><p>Data type</p></td><td valign="top" width="396"><p>Values</p></td></tr><tr><td nowrap="" rowspan="4" valign="top" width="208"><p>Address type</p></td><td nowrap="" valign="top" width="396"><p>Reserved</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>ICAO</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Unique identifier</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Reserved</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td valign="top" width="396"><p>Values</p></td></tr><tr><td nowrap="" rowspan="17" valign="top" width="208"><p>Aircraft category</p></td><td nowrap="" valign="top" width="396"><p>No emitter category information available</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Light fixed-wing (<7 031 kg / 15 500 lb)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Small to heavy fixed-wing (≥7 031 kg / 15 500 lb)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Light rotorcraft</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Heavy rotorcraft</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Glider/sailplane</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Lighter-than-air</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Ultralight</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Hang-glider</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Paraglider</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Parachutist/skydiver/wingsuit</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>eVTOL/UAM</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>UAS ‘open’ category</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>UAS ‘specific’ category</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>UAS ‘certified’ category</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Model plane</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>Reserved</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td nowrap="" valign="top" width="396"><p>95 % horizontal accuracy bound</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU ≥ 926 m (0.5 NM)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 926 m (0.5 NM)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 555.6 m (0.3 NM)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 185.2 m (0.1 NM)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 92.6 m (0.05 NM)</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 30 m</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 10 m</p></td></tr><tr><td nowrap="" valign="top" width="396"><p>EPU < 3 m</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="595"><tr><td nowrap="" valign="top" width="208"><p>Data type</p></td><td nowrap="" valign="top" width="387"><p>95 % geometric altitude accuracy</p></td></tr><tr><td nowrap="" rowspan="4" valign="top" width="208"><p>Vertical position accuracy </p></td><td nowrap="" valign="top" width="387"><p>Unknown or > 150 m</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>≤ 150 m</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>≤ 45 m</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>≤ 15 m</p></td></tr></table> TABLES FOR OPTIONAL PARAMETERS <table border="1" cellpadding="0" cellspacing="0" width="595"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td valign="top" width="387"><p>Values</p></td></tr><tr><td nowrap="" rowspan="8" valign="top" width="208"><p>Emergency status</p></td><td nowrap="" valign="top" width="387"><p>No emergency</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>General emergency</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>Lifeguard/medical emergency</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>Minimum fuel (Energy)</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>No communications</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>Unlawful interference</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>Downed aircraft</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>Reserved</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="595"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td valign="top" width="387"><p>Horizontal Figure of Merit for rate (HFOMr) values</p></td></tr><tr><td nowrap="" rowspan="4" valign="top" width="208"><p>Velocity accuracy</p></td><td nowrap="" valign="top" width="387"><p>Unknown or ≥ 10 m/s</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 10 m/s</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 3 m/s</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 1 m/s</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="595"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td valign="top" width="387"><p>Software and hardware DAL</p></td></tr><tr><td nowrap="" rowspan="4" valign="top" width="208"><p>Design assurance</p></td><td nowrap="" valign="top" width="387"><p>n/a</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>D</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>C</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>B</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="595"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td nowrap="" valign="top" width="387"><p>Rc</p></td></tr><tr><td rowspan="12" valign="top" width="208"><p>Navigation integrity</p></td><td nowrap="" valign="top" width="387"><p>≥ 20 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 20 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 8 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 4 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 2 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 1 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 0.6 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 0.2 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 0.1 NM</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 75 m</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 25 m</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>< 7.5 m</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="595"><tr><td nowrap="" valign="top" width="208"><p>Parameter</p></td><td valign="top" width="387"><p>Probability of exceeding Rc</p></td></tr><tr><td nowrap="" rowspan="4" valign="top" width="208"><p>Source integrity level</p></td><td nowrap="" valign="top" width="387"><p>Unknown or > 1E-3 / FH</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>≤ 1E-3 / FH</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>≤ 1E-5 / FH</p></td></tr><tr><td nowrap="" valign="top" width="387"><p>≤ 1E-7 / FH</p></td></tr></table> TRANSMISSION RATE The *position* and *velocity/track* parameters should be transmitted at a rate of at least 1 Hz. The transmission of other parameters may be less frequent than 1 Hz, but not less frequent than 0.1 Hz. ERROR CONTROL There should be at least a digital error detection technique at one level of the transmission (e.g. cyclic redundancy check (CRC)). No specific error-control means are prescribed. SECURITY The transmission should be protected to ensure security and confidentiality of the exchanged parameters. POSITION SOURCE The *horizontal and vertical position* and *velocity/track* parameters should primarily be based on a GNSS source.
##### Appendix 1 to AMC1 SERA.6005(c) Requirements for communications, SSR transponder and electronic conspicuity in U-space airspace *ED Decision 2022/024/R* **ADS-L MESSAGE GENERATION FUNCTION** (a) This AMC details the minimum set of parameters that should be transmitted, and a set of parameters that may be optionally transmitted. (b) All parameters should originate from a position source or from the system configuration. Each ADS-L message should include an identifier unique to the transmission source.  **Figure 1: The scope of the ADS-L message generation function (dashed line) as specified in Appendix 1 to AMC1 to SERA.6005(c)** **TRANSMITTED PARAMETERS** <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <col/> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Data type</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Parameter</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Required/optional</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Remarks</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Source</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="2"><p align="left"> <b>Aircraft address</b></p> </td> <td bgcolor="#d9d9d9"><p align="left"> Unique identifier / address</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Should be included in each transmission</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Configuration</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Address type</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9"><p align="left"> See the table below</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Configuration</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> <b>Time</b></p> </td> <td bgcolor="#d9d9d9"><p align="left"> Timestamp</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9"><p align="left"> <br/> </p> </td> <td bgcolor="#d9d9d9"><p align="left"> Position source</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> <b>Aircraft identification</b></p> </td> <td bgcolor="#d9d9d9"><p align="left"> Aircraft category</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9"><p align="left"> See the table below</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Configuration</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> <b>Emergency status</b></p> </td> <td bgcolor="#d9d9d9"><p align="left"> Emergency status</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Optional</p> </td> <td bgcolor="#d9d9d9"><p align="left"> See the table below</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Pilot-in-command inputs</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="3"><p align="left"> <b>Position</b></p> </td> <td bgcolor="#d9d9d9"><p align="left"> Latitude</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Reference WGS-84</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Position source</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Longitude</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Reference WGS-84</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Position source</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> GNSS altitude</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Reference WGS-84<br/> Height Above Ellipsoid (HAE)</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Position source</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="3"><p align="left"> <b>Velocity/track</b></p> </td> <td bgcolor="#d9d9d9"><p align="left"> Ground speed</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9" rowspan="2"><p align="left"> Alternatively, north-south, east-west velocities</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Position source</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Ground track</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Position source</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Vertical rate</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9"><p align="left"> <br/> </p> </td> <td bgcolor="#d9d9d9"><p align="left"> Position source</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> <br/> </p> </td> <td bgcolor="#d9d9d9"><p align="left"> Velocity accuracy</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Optional</p> </td> <td bgcolor="#d9d9d9"><p align="left"> See the table below</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Position source</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="6"><p align="left"> <b>Capabilities and status</b></p> </td> <td bgcolor="#d9d9d9"><p align="left"> Version</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9"><p align="left"> To facilitate interoperability</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Configuration</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Design assurance</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Optional</p> </td> <td bgcolor="#d9d9d9"><p align="left"> See the table below</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Configuration</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Horizontal position accuracy</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9"><p align="left"> 95 % confidence<br/> See table below</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Position source</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Vertical position accuracy</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Required</p> </td> <td bgcolor="#d9d9d9"><p align="left"> 95 % confidence<br/> See the table below</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Position source</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Navigation integrity</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Optional</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Containment radius (Rc) <br/> See table below</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Position source</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Source integrity level</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Optional</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Probability that Rc is exceeded<br/> See the table below </p> </td> <td bgcolor="#d9d9d9"><p align="left"> Configuration</p> </td> </tr> </table> **TABLES FOR REQUIRED PARAMETERS** <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Data type</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Values</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="4"><p align="left"> Address type</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Reserved</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> ICAO</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Unique identifier</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Reserved</p> </td> </tr> </table> <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Parameter</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Values</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="17"><p align="left"> Aircraft category</p> </td> <td bgcolor="#d9d9d9"><p align="left"> No emitter category information available</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Light fixed-wing (<7 031 kg / 15 500 lb)</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Small to heavy fixed-wing (≥7 031 kg / 15 500 lb)</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Light rotorcraft</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Heavy rotorcraft</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Glider/sailplane</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Lighter-than-air</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Ultralight</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Hang-glider</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Paraglider</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Parachutist/skydiver/wingsuit</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> eVTOL/UAM</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> UAS ‘open’ category</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> UAS ‘specific’ category</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> UAS ‘certified’ category</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Model plane</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Reserved</p> </td> </tr> </table> <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Parameter</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>95 % horizontal accuracy bound</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="8"><p align="left"> <br/> </p> </td> <td bgcolor="#d9d9d9"><p align="left"> EPU ≥ 926 m (0.5 NM)</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> EPU < 926 m (0.5 NM)</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> EPU < 555.6 m (0.3 NM)</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> EPU < 185.2 m (0.1 NM)</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> EPU < 92.6 m (0.05 NM)</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> EPU < 30 m</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> EPU < 10 m</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> EPU < 3 m</p> </td> </tr> </table> <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Data type</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>95 % geometric altitude accuracy</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="4"><p align="left"> Vertical position accuracy </p> </td> <td bgcolor="#d9d9d9"><p align="left"> Unknown or > 150 m</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> ≤ 150 m</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> ≤ 45 m</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> ≤ 15 m</p> </td> </tr> </table> **TABLES FOR OPTIONAL PARAMETERS** <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Parameter</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Values</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="8"><p align="left"> Emergency status</p> </td> <td bgcolor="#d9d9d9"><p align="left"> No emergency</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> General emergency</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Lifeguard/medical emergency</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Minimum fuel (Energy)</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> No communications</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Unlawful interference</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Downed aircraft</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Reserved</p> </td> </tr> </table> <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Parameter</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Horizontal Figure of Merit for rate (HFOMr) values</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="4"><p align="left"> Velocity accuracy</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Unknown or ≥ 10 m/s</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 10 m/s</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 3 m/s</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 1 m/s</p> </td> </tr> </table> <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Parameter</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Software and hardware DAL</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="4"><p align="left"> Design assurance</p> </td> <td bgcolor="#d9d9d9"><p align="left"> n/a</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> D</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> C</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> B</p> </td> </tr> </table> <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Parameter</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Rc</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="12"><p align="left"> Navigation integrity</p> </td> <td bgcolor="#d9d9d9"><p align="left"> ≥ 20 NM</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 20 NM</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 8 NM</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 4 NM</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 2 NM</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 1 NM</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 0.6 NM</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 0.2 NM</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 0.1 NM</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 75 m</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 25 m</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> < 7.5 m</p> </td> </tr> </table> <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Parameter</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Probability of exceeding Rc</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9" rowspan="4"><p align="left"> Source integrity level</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Unknown or > 1E-3 / FH</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> ≤ 1E-3 / FH</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> ≤ 1E-5 / FH</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> ≤ 1E-7 / FH</p> </td> </tr> </table> **TRANSMISSION RATE** The *position* and *velocity/track* parameters should be transmitted at a rate of at least 1 Hz. The transmission of other parameters may be less frequent than 1 Hz, but not less frequent than 0.1 Hz. **ERROR CONTROL** There should be at least a digital error detection technique at one level of the transmission (e.g. cyclic redundancy check (CRC)). No specific error-control means are prescribed. **SECURITY** The transmission should be protected to ensure security and confidentiality of the exchanged parameters. **POSITION SOURCE** The *horizontal and vertical position* and *velocity/track* parameters should primarily be based on a GNSS source.