System Description

System Description and Installation Manual for MXS ICD10004-01
© Sagetech Corporation 2018 Confidential Proprietary Export-Controlled Page 132 of 160
SV Quality - NACp
SV Quality - NACp
The NACp field reports the level of accuracy of the geometric position being reported. EPU is
defined as the radius of a circle that is centered on the TIS-B participant and indicates the probability
of being inside the circle is 95%.
SV Quality - NACv
Byte Offset
Byte Name Field Description
22
NV0
NV0 Horizontal Velocity Error
0x00
0x01
0x02
0x03
0x04
0x05-0xFF
Unknown or ≥10 m/s
< 10 m/s
< 3 m/s
< 1 m/s
< 0.3 m/s
Reserved
SV Quality - NACv
The NACv field reports the horizontal velocity error with 95% certainty.
SV Quality – SIL
Byte Offset
Byte Name Field Description
23
SL0
SV Quality - SIL
The Source Integrity Level provides the probability of the TIS-B participant exceeding the radius of
containment specified by the NIC field.
Bit 1 Bit 0 Probability of Exceeding the NIC Containment Radius (Rc)
0
0
1
1
0
1
0
1
Unknown or > 1x10
-3
per flight hour or per sample
≤ 1x10
-3
per flight hour or per sample
≤ 1x10
-5
per flight hour or per sample
≤ 1x10
-7
per flight hour or per sample
Message Reserved3