Asterix expansion 062 - Coding rules for Reserved Expansion Field

category: 062

edition: 1.3

date: 2023-02-13

Description of asterix expansion

Compound item (fspec=8 bits)

I062/CST - Contributing Sensors With Local Tracknumbers

Repetitive item, repetition factor 8 bits.

I062/CST/SAC - System Area Code

8 bits [........]

raw value

I062/CST/SIC - System Identification Code

8 bits [........]

raw value

I062/CST/(spare)

4 bits [....]

I062/CST/TYP

4 bits [....]

values:

0: No detection
1: Single PSR detection
2: Single SSR detection
3: SSR+PSR detection
4: Single Mode S All-Call
5: Single Mode S Roll-Call
6: Mode S All-Call + PSR
7: Mode S Roll-Call + PSR
8: ADS-B
9: WAM

I062/CST/LTN - Local Track Number

16 bits [................]

raw value

I062/CSN - Contributing Sensors No Local Tracknumbers

Repetitive item, repetition factor 8 bits.

I062/CSN/SAC - System Area Code

8 bits [........]

raw value

I062/CSN/SIC - System Identification Code

8 bits [........]

raw value

I062/CSN/(spare)

4 bits [....]

I062/CSN/TYP

4 bits [....]

values:

0: No detection
1: Single PSR detection
2: Single SSR detection
3: SSR+PSR detection
4: Single Mode S All-Call
5: Single Mode S Roll-Call
6: Mode S All-Call + PSR
7: Mode S Roll-Call + PSR
8: ADS-B
9: WAM

I062/TVS - Calculated Track Velocity Relative to System Reference Point

I062/TVS/VX

16 bits [................]

signed quantity

unit: “m/s”

LSB = 1/2² m/s ≈ 0.25 m/s

value > = − 8192 m/s

value < = 32767/4 m/s

I062/TVS/VY

16 bits [................]

signed quantity

unit: “m/s”

LSB = 1/2² m/s ≈ 0.25 m/s

value > = − 8192 m/s

value < = 32767/4 m/s

remark

Note:

The y-axis points to the Geographical North at the system reference point as available in the Reserved Expansion Field of category 065.

I062/STS - Supplementary Track Status

Extended item.

I062/STS/FDR - Flight Data Retained

1 bit [.]

values:

0: Flight plan data from active FDPS
1: Flight plan data retained from no longer active FDPS

I062/STS/LNAV - Lateral Navigation Mode

I062/STS/LNAV/EP - LNAV Element Populated

1 bit [.]

values:

0: LNAV not populated
1: LNAV populated

I062/STS/LNAV/VAL - LNAV Mode

1 bit [.]

values:

0: LNAV Mode Engaged
1: LNAV Mode not Engaged

I062/STS/(spare)

4 bits [....]

(FX)

extension bit

0: End of data item
1: Extension into next extent

remark

Note:

The information of the Lateral Navigation Mode LNAV complements the already existing Navigation Modes in Data Item I062/380/SF#7.

I062/V3 - ADS-B Version 3 Data

Compound item (FX)
I062/V3/PS3 - Priority Status for Version 3 ADS-B Systems
I062/V3/PS3/EP - Priority Status for Version 3 ADS-B Systems Populated

1 bit [.]

values:

0: PS3 Element not populated
1: PS3 Element populated

I062/V3/PS3/VAL - Priority Status for Version 3 ADS-B Systems

3 bits [...]

values:

0: No emergency / not reported
1: General emergency
2: UAS/RPAS - Lost link
3: Minimum fuel
4: No communications
5: Unlawful interference
6: Aircraft in Distress Automatic Activation
7: Aircraft in Distress Manual Activation

I062/V3/PS3/(spare)

4 bits [....]
remark
Notes:
The ADS-B Version Number is contained in Data Item I062/380/SF#11/VN.

Since in this edition of the REF I062/REF/PS3 is the only Element in this Item, the Element Populated Bit strictly would not be necessary. However, if in a future edition use is made of the Spare Bits, the Element Populated Bit becomes important.
For ADS-B Version 3 systems as defined in ED-102B/DO-260C (Ref. [5], as defined in the core Specification of Category 062), the values have been re-defined. I062/REF/PS3 is to be used exclusively for Version 3 ADS-B systems as defined in I062/380/SF#11/VN. For ADS-B systems with a version number below 3, the PS shall be encoded in Data Item I062/380/SF#11/STAT. However, since values have been re-defined in ADS-B Version 3, mapping is required to ensure that information is not lost in systems not yet capable to decode this Edition of Category 062. This mapping shall be done according to the following table: :
ADS-B Version 3 (PS3)           ADS-Version < 3 (I062/380 - STAT)
0 (No Emergency/not reported)   0 (No Emergency/not reported)
1 (General emergency)           1 (General emergency)
2 (UAS/RPAS Lost Link)          4 (No communication)
3 (MInimum fuel)                3 (Minimum fuel)
4 (No communication)            4 (No communication)
5 (Unlawful interference)       5 (Unlawful interference)
6 (Aircraft in distress -       1 (General emergency)
  automatic activation)
7 (Aircraft in distress -       1 (General emergency)
  manual activation)
I062/V3/AS - Aircraft Status

I062/V3/AS/RCE - Reduced Capability Equipment

I062/V3/AS/RCE/EP - Element Populated Bit

1 bit [.]

values:

0: Element not populated
1: Element populated

I062/V3/AS/RCE/VAL - Value

2 bits [..]

values:

0: Not RCE
1: TABS
2: Reserved for future use
3: Other RCE

I062/V3/AS/RRL - Reply Rate Limiting

I062/V3/AS/RRL/EP - Element Populated Bit

1 bit [.]

values:

0: Element not populated
1: Element populated

I062/V3/AS/RRL/VAL - Value

1 bit [.]

values:

0: Reply Rate Limiting is not active
1: Reply Rate Limiting is active

I062/V3/AS/TPW - Transmit Power

I062/V3/AS/TPW/EP - Element Populated Bit

1 bit [.]

values:

0: Element not populated
1: Element populated

I062/V3/AS/TPW/VAL - Value

2 bits [..]

values:

0: Unavailable, Unknown, or less than 70 W
1: 70 W
2: 125 W
3: 200 W

I062/V3/AS/TSI - Transponder Side Indication

I062/V3/AS/TSI/EP - Element Populated Bit

1 bit [.]

values:

0: Element not populated
1: Element populated

I062/V3/AS/TSI/VAL - Value

2 bits [..]

values:

0: Unknown
1: Transponder #1 (left/pilot side or single)
2: Transponder #2 (right/co-pilot side)
3: Transponder #3 (auxiliary or Back-up)

I062/V3/AS/TAO - Transponder Antenna Offset

I062/V3/AS/TAO/EP - Element Populated Bit

1 bit [.]

values:

0: Element not populated
1: Element populated

I062/V3/AS/TAO/RE - Range Exceeded

1 bit [.]

values:

0: Value in defined range
1: Value exceeds defined range

I062/V3/AS/TAO/VAL - Value

6 bits [......]

raw value

I062/V3/AS/(spare)

5 bits [.....]

remark

Notes:

TABS is the “Traffic Awareness Beacon System” as defined by ETSO-C199 / TSO-C199.

PW contains the nearest minimum transmit power (in Watts) at the antenna port. The nearest minimum setting in this field would be rounded down from the actual design value. For example, if the avionics is designed to transmit at 100W out of the antenna port, the encoded value in this field would be for 70W (decimal 1).

Bit-12 shall be set to 1 when the aircraft transmits the maximum encodable value (i.e. 31 representing a TAO greater than 58m). In this case TAO#VAL shall be set to the maximum encodable TAO (i.e. 58m).

The TAO is measured along the longitudinal axis of the aircraft from the forward end.

UAS “UAS/RPAS Status”

group

MUO “Manned / Unmanned Operation”

group

EP “Element Populated Bit”

element 1

table

0: Element not populated 1: Element populated

VAL “Value”

element 1

table:

0: Manned Operation 1: Unmanned Operation

DAA “Detect and Avoid Capabilities”

group

EP “Element Populated Bit”

element 1

table

0: Element not populated 1: Element populated

VAL “Value”

element 2

table

0: No RWC Capability 1: RWC/RA/OCM Capability 2: RWC/OCM Capability 3: Invalid ASTERIX Value

RWC “Remain Well Clear”

group

EP “Element Populated Bit”

element 1

table

0: Element not populated 1: Element populated

VAL “Value”

element 1

table

0: RWC Corrective Alert not active 1: RWC Corrective Alert active

spare 1

CASS “Collision Avoidance System Status”

group

SVH “Sense Vertical & Horizontal group EP ”Element Populated Bit”

element 1

table

0: Element not populated 1: Element populated

VAL “Value” element 2 table 0: Vertical Only 1: Horizontal Only 2: Blended 3: Vertical Only or Horizontal Only per intruder

CATC “CAS Type & Capability group EP ”Element Populated Bit”

element 1

table

0: Element not populated 1: Element populated

VAL “Value” element 3 table 0: Active CAS (TCAS II) or no CAS 1: Active CAS (not TCAS II) 2: Active CAS (not TCAS II) with OCM transmit capability 3: Active CAS of Junior Status 4: Passive CAS with 1030 TCAS Resolution Message receive capability 5: Passive CAS with only OCM receive capability 6: Reserved for future use 7: Reserved for future use

spare 1