The data format supplied by ATS ANSPs can be one of the following ASTERIX types:
- ASTERIX CAT048
- ASTERIX CAT062
An alternative is to provide the data in ASCII format but this is not the preferred option of the EMADDC team.
The EMADDC team has a strong preference to receive ASTERIX CAT048 over ASTERIX CAT062. The reason being the lower resolution of the MACH number in ASTERIX CAT62 which in turn reduces the quality of the derived Temperature. EMADDC can process both ASTERIX formats.
If only ASTERIX CAT062 data can be provided, EMADDC requests that the Mach number is also supplied at a higher resolution (0.001) within CAT062 I062/380 subfield #4. Additionally, the EMADDC team would like to inquire about the interpolation method(s) used by the radar tracker and for wich parameters., as interpolation between raw observations can often result in reduced quality of the derived meteorological data. EMADDC also needs to eliminate redundant data when the Aircraft Derived Data (I062/380) does not contain new information, based on the data age indicators in I062/295. Consequently, CAT062 typically delivers approximately 30% of the valuable data compared to CAT048.
For both formats the fields below are normally filled by ATS and decoded by the EMADDC software.
In order to fill these fields, BDS 2.0 (Aircraft Registration) BDS 4.0, BDS 5.0 and BDS 6.0 are required and need to be interrogated. If available, BDS 4.4 MRAR reports are also requested and are processed by EMADDC. Data shall be supplied in real-time via NewPENS as of Q4/2024.
Before EMADDC can process ASTERIX data the EMADDC processing requires radar detail information to calculate the position of the aircraft observations. For that reason the EMADDC team requests data suppliers to provide a file containing the following information of each radar present in the data provided:
- Radar SAC (System Area Code)
- Radar SIC (System Identification Code)
- Radar Latitude
- Radar Longitude
- Radar Elevation (including radar height) above MSL
The tables below show the possible content of the data for CAT048 and CAT 062.
| ASTERIX CAT048 |
|
| I048/010 |
Data Source Identifier |
| I048/140 |
Time of Day |
| I048/020 |
Target Report Descriptor |
| I048/040 |
Measured Position in Polar Co-ordinates |
| I048/070 |
Mode-3/A Code in Octal Representation |
| I048/090 |
Flight Level in Binary Representation |
| I048/130 |
Radar Plot Characteristics |
| I048/220 |
Aircraft Address |
| I048/240 |
Aircraft Identification |
| I048/250 |
Mode S MB Data |
| I048/042 |
Calculated Position in Cartesian Co-ordinates |
| I048/170 |
Track Status |
| I048/030 |
Warning/Error Conditions |
| I048/100 |
Mode-C Code and Code Confidence Indicator |
| I048/120 |
Radial Doppler Speed |
| ASTERIX CAT062 |
|
| I048/010 |
Data Source Identifier |
| I062/015 |
Service Identification |
| I048/140 |
Time of Track |
| I062/105 |
Calculated Track Position (WGS84) |
| I062/100 |
Calculated Track Position (Cartesian) |
| I062/185 |
Calculated Track Velocity (Cartesian) |
| I062/060 |
Track Mode 3/A Code |
| I062/380 |
Aircraft derived data |
| I062/040 |
Track number |
| I062/080 |
Track status |
| I062/290 |
System Track update ages |
| I062/200 |
Mode of Movement |
| I062/295 |
Track data ages |
| I062/136 |
Measured Flight Level |
| I062/130 |
Calculated Track Geometric Altitude |
| I062/135 |
Calculated Track Barometric Flight level |
| I062/390 |
Flight Plan Related Data (optional) |
| I062/270 |
Target Size and Orientation (optional) |
| I062/110 |
Mode 5 data reports (optional) |
| I062/510 |
Composed Track Number |
| I062/500 |
Estimated Accuracies |
| I062/340 |
Measured information |