ASTERIX Category 004 - Safety Net Messages

Safety Net message processing. More...

Collaboration diagram for ASTERIX Category 004 - Safety Net Messages:

Topics

 Data Item I004/000 - Message Type
 Type of safety net message being transmitted.
 Data Item I004/010 - Data Source Identifier
 Identification of the Safety Net server sending the message.
 Data Item I004/020 - Time of Message
 Absolute time stamping of the message.
 Data Item I004/030 - Track Number 1
 Identification of a track number related to conflict.
 Data Item I004/035 - Track Number 2
 Second track number defining the track pair in conflict.
 Data Item I004/040 - Alert Identifier
 Unique identifier for an alert instance.
 Data Item I004/060 - Safety Net Function & System Status
 Status of safety net functions and system operational state.
 Data Item I004/100 - Area Definitions
 Definition of geographical areas for safety net functions.
 Data Item I004/120 - Conflict Characteristics
 Detailed characteristics of a detected conflict.
 Data Item I004/170 - Aircraft Identification & Characteristics 1
 Aircraft identification and characteristics for Track 1.
 Data Item I004/171 - Aircraft Identification & Characteristics 2
 Aircraft identification and characteristics for Track 2.
 Data Item I004/REF - Reserved Expansion Field
 Reserved expansion field (FRN 20 RE).
 Data Item I004/SPF - Special Purpose Field
 Special purpose field (FRN 21 SP).
 Data Record I004 - Safety Net Messages
 Complete data record for Category 004 messages.

Detailed Description

Safety Net message processing.

Overview:
Category 004 is used for the transmission of messages originating from Safety Net Systems. Safety nets provide additional system safety defences to assist in preventing collisions between aircraft and controlled flight into terrain accidents.
Safety Net Functions:
  • STCA: Short Term Conflict Alert
  • MSAW: Minimum Safe Altitude Warning
  • APM: Approach Path Monitor
  • APW: Area Proximity Warning
  • CLAM: Clearance Level Adherence Monitor
  • RAM: Route Adherence Monitor
  • RIMCAS: Runway Incursion Monitoring and Conflict Alert System
  • ACAS RA: ACAS Resolution Advisory
  • NTCA: Near Term Conflict Alert
  • And more...
Data Items:
  • I004/000 Message Type (always present)
  • I004/010 Data Source Identifier (always present)
  • I004/015 SDPS Identifier
  • I004/020 Time of Message (always present)
  • I004/030 Track Number 1
  • I004/035 Track Number 2
  • I004/040 Alert Identifier
  • I004/045 Alert Status
  • I004/060 Safety Net Function & System Status
  • I004/070 Conflict Timing and Separation
  • I004/074 Longitudinal Deviation
  • I004/075 Transversal Distance Deviation
  • I004/076 Vertical Deviation
  • I004/100 Area Definitions
  • I004/110 FDPS Sector Control Identification
  • I004/120 Conflict Characteristics
  • I004/170 Aircraft Identification & Characteristics 1
  • I004/171 Aircraft Identification & Characteristics 2
  • I004/RE Reserved Expansion Field
  • I004/SP Special Purpose Field