asterix specification

Asterix category 063 - Sensor Status Reports

category: 063

edition: 1.6

date: 2020-08-04

Preamble

Surveillance data exchange.

Description of standard data items

I063/010 - Data Source Identifier

definition: Identification of the radar station from which the data are received.

Group

I063/010/SAC - System Area Code

Element

bit size: 8

Raw Content

I063/010/SIC - System Identification Code

Element

bit size: 8

Raw Content

Note:

The defined SACs are on the EUROCONTROL ASTERIX website (www.eurocontrol.int/asterix)

I063/015 - Service Identification

definition: Identification of the service provided to one or more users.

Element

bit size: 8

Raw Content

The service identification is allocated by the SDPS

I063/030 - Time of Message

definition: Absolute time stamping of the message, in the form of elapsed time since last midnight, expressed as UTC.

Element

bit size: 24

Unsigned quantity

LSB = 1/27 s ≈ 7.8125e − 3 s

unit: "s"

The time of the day value is reset to zero at every midnight.

I063/050 - Sensor Identifier

Group

I063/050/SAC - System Area Code

Element

bit size: 8

Raw Content

I063/050/SIC - System Identification Code

Element

bit size: 8

Raw Content

I063/060 - Sensor Configuration and Status

definition: Configuration and status of the sensor

Extended

I063/060/CON

Element

bit size: 2

Values:

0:
Operational
1:
Degraded
2:
Initialization
3:
Not currently connected

I063/060/PSR

Element

bit size: 1

Values:

0:
PSR GO
1:
PSR NOGO

I063/060/SSR

Element

bit size: 1

Values:

0:
SSR GO
1:
SSR NOGO

I063/060/MDS

Element

bit size: 1

Values:

0:
MDS GO
1:
MDS NOGO

I063/060/ADS

Element

bit size: 1

Values:

0:
ADS GO
1:
ADS NOGO

I063/060/MLT

Element

bit size: 1

Values:

0:
MLT GO
1:
MLT NOGO

(FX) - extension bit

I063/060/OPS - Operational Release Status of the System

Element

bit size: 1

Values:

0:
System is released for operational use
1:
Operational use of System is inhibited

I063/060/ODP - Data Processor Overload Indicator

Element

bit size: 1

Values:

0:
Default, no overload
1:
Overload in DP

I063/060/OXT - Transmission Subsystem Overload Status

Element

bit size: 1

Values:

0:
Default, no overload
1:
Overload in transmission subsystem

I063/060/MSC - Monitoring System Connected Status

Element

bit size: 1

Values:

0:
Monitoring system connected
1:
Monitoring system disconnected

I063/060/TSV - Time Source Validity

Element

bit size: 1

Values:

0:
Valid
1:
Invalid

I063/060/NPW - No Plot Warning

Element

bit size: 1

Values:

0:
Default (no meaning)
1:
No plots being received

Spare bits: 1

(FX) - extension bit

  1. GO/NOGO information from PSR, SSR, Mode S, ADS and MLT is derived from monosensor categories and has a meaning only for operational sensors, whereas (CON) is derived by the SDPS.
  2. The information (OPS), (ODP), (OXT), (MSC) and (TSV) are only related to CNS/ATM Ground Station and are derived from monosensor category (ASTERIX Cat 023).

I063/070 - Time Stamping Bias

definition: Plot Time stamping bias, in two’s complement form

Element

bit size: 16

Signed quantity

LSB = 1 ms ≈ 1.0 ms

unit: "ms"

I063/080 - SSR / Mode S Range Gain and Bias

definition: SSR / Mode S Range Gain and Range Bias, in two’s complement form.

Group

I063/080/SRG - Mode S Range Gain

Element

bit size: 16

Signed quantity

LSB = 1/100000 ≈ 1.0e − 5

unit: ""

I063/080/SRB - Mode S Range Bias

Element

bit size: 16

Signed quantity

LSB = 1/27 NM ≈ 7.8125e − 3 NM

unit: "NM"

Note:

The following formula is used to correct range:

$$\rho_\mathrm{corrected} = \frac{\rho_\mathrm{measured} - range\_bias}{1 + range\_gain}$$

I063/081 - SSR Mode S Azimuth Bias

definition: SSR / Mode S Azimuth Bias, in two’s complement form.

Element

bit size: 16

Signed quantity

LSB = 360/216 ° ≈ 5.4931640625e − 3 °

unit: "°"

Note:

The following formula is used to correct azimuth:

θcorrected = θmeasured − azimuth_bias

I063/090 - PSR Range Gain and Bias

definition: PSR Range Gain and PSR Range Bias, in two’s complement form.

Group

I063/090/PRG - PSR Range Gain

Element

bit size: 16

Signed quantity

LSB = 1/100000 ≈ 1.0e − 5

unit: ""

I063/090/PRB - PSR Range Bias

Element

bit size: 16

Signed quantity

LSB = 1/27 NM ≈ 7.8125e − 3 NM

unit: "NM"

Note:

The following formula is used to correct range:

rhomathrm{corrected} = frac{rhomathrm{measured} - range_bias}{1 + range_gain}

I063/091 - PSR Azimuth Bias

definition: PSR Azimuth Bias, in two’s complement form.

Element

bit size: 16

Signed quantity

LSB = 360/216 ° ≈ 5.4931640625e − 3 °

unit: "°"

Note:

The following formula is used to correct azimuth:

θcorrected = θmeasured − azimuth_bias

I063/092 - PSR Elevation Bias

definition: PSR Elevation Bias, in two’s complement form.

Element

bit size: 16

Signed quantity

LSB = 360/216 ° ≈ 5.4931640625e − 3 °

unit: "°"

I063/RE - Reserved Expansion Field

definition: Expansion

Explicit (ReservedExpansion)

I063/SP - Special Purpose Field

definition: Special Purpose Field

Explicit (SpecialPurpose)

User Application Profile