asterix 025 "CNS/ATM Ground System Status Reports" edition 1.5 date 2021-07-01 preamble Surveillance data exchange. items 000 "Report Type" definition This Data Item allows for a more convenient handling of the reports at the receiver side by further defining the type of transaction. group RTYP "Report Type" element 7 raw RG "Report Generation" element 1 table 0: Periodic Report 1: Event Driven Report remark Notes: 1. In applications where transactions of various types are exchanged, the Report Type Data Item facilitates the proper report handling at the receiver side. 2. All Report Type values are reserved for common standard use. 3. The following set of Report Types are standardised for Category 025 records: • 001 Service and System Status report (see 4.5.1.1. above) • 002 Component Status report (see 4.5.1.2. above) • 003 Service Statistics report (see 4.5.1.3. above) 4. The list of items present for the three report types is defined in the following table. M stands for mandatory, O for optional, X for never present. :: Item 001 002 003 I025/000 M M M I025/010 M M M I025/015 M X M I025/020 O X O I025/070 M M M I025/100 O X X I025/105 O X X I025/120 O M X I025/140 X X M I025/200 O O O I025/600 O (See Note) O X I025/610 O (See Note) O X 5. With Edition 1.3 of this specification the Encoding Rules for Data Item I025/600 and I025/610 in Message Type 001 have been changed from “Mandatory” to “Optional”. Before changing the data source such that the encoding of these Data Items is changed from “included” to “not included” it needs to be ensured that downstream systems do not apply “Mandatory Item Checks”. Otherwise this may lead to suppression of the Category 025 Record by the receiving system. 010 "Data Source Identifier" definition Identification of the Ground System from which the data is received. group SAC "System Area Code" element 8 raw SIC "System Identification Code" element 8 raw remark Notes: 1. The up-to-date list of SACs is published on the EUROCONTROL Web Site (http://www.eurocontrol.int/asterix). 2. The SICs are allocated by the national authority responsible for the surveillance infrastructure. 015 "Service Identification" definition Identifies the service being reported. element 8 raw remark Note: - The service identification is allocated by the system. 020 "Service Designator" definition Designator of the service being reported. element 48 string icao remark Notes: 1. bits-48/1 Service Designator. Characters 1-8 (coded on 6 Bits each) defining the text readable designator for each Service. Each character of the service designator is encoded as defined below (see ICAO Annex 10, Volume IV, page 3-77, table 3-9): :: . . . . b6 0 0 1 1 . . . . b5 0 1 0 1 b4 b3 b2 b1 0 0 0 0 P SP 0 0 0 0 1 A Q 1 0 0 1 0 B R 2 0 0 1 1 C S 3 0 1 0 0 D T 4 0 1 0 1 E U 5 0 1 1 0 F V 6 0 1 1 1 G W 7 1 0 0 0 H X 8 1 0 0 1 I Y 9 1 0 1 0 J Z 1 0 1 1 K 1 1 0 0 L 1 1 0 1 M 1 1 1 0 N 1 1 1 1 O SP 1 = SPACE code For each character the following bit numbering convention shall be observed: b6 b5 b4 b3 b2 b1 2. Assignments of Service designators to specific services/systems and interpretation of these fields are implementation dependent. 3. Examples of Service Designators are “1090ADSB”, “WAM”, “1090TISB”, etc. 4. Multiple Service Type Designators may be used to describe a single service where applicable 070 "Time of Day" definition Absolute time stamping expressed as UTC time. element 24 unsigned quantity 1/2^7 "s" remark Note: - The time of day value is reset to zero each day at midnight. 100 "System and Service Status" definition Information concerning the status of the Service Volume. extended NOGO "" element 1 table 0: Data is released for operational use 1: Data must not be used operationally OPS "" element 2 table 0: Operational 1: Operational but in Standby 2: Maintenance 3: Reserved for future use SSTAT "" element 4 table 0: Running 1: Failed 2: Degraded 3: Undefined 4: Reserved for future use 5: Reserved for future use 6: Reserved for future use 7: Reserved for future use 8: Reserved for future use 9: Reserved for future use 10: Reserved for future use 11: Reserved for future use 12: Reserved for future use 13: Reserved for future use 14: Reserved for future use 15: Reserved for future use - spare 1 SYSTAT "" element 3 table 0: Running / OK 1: Failed 2: Degraded 3: Undefined 4: Reserved for future use 5: Reserved for future use 6: Reserved for future use 7: Reserved for future use SESTAT "" element 3 table 0: OK 1: Failed 2: Degraded 3: Undefined 4: Reserved for future use 5: Reserved for future use 6: Reserved for future use 7: Reserved for future use - remark Notes: 1. Bit 8 (NOGO), when set to “1” indicates that the data transmitted by the system/service is not released for operational use. This indication is independent from the status of the system itself or that of the service. It just indicates that the system or service volume output must not be used for operational services but may be used for, e.g. test and validation purposes. The indication GO/NO-GO indicates a mode of the system rather than a status. Usually this bit will be set by operator input. 2. Bit 7/6 (OPS), when set to “1” indicates that the service is running but not operationally used (e.g. for a standby system in a redundant configuration). 3. Bits 5/2 (SSTAT): This information informs about the state of the overall service volume status. The actual implementation of this field is service dependent and should be described in the system/service specification. However, it is expected that – as far as this information is available – a mapping is performed between the states of individual components as reported in data item I025/120. As an example, if one component fails but the system is still operational (at least partially), the service status should change to “Degraded”. 4. To bit 7 (ERR): This bit set to “1” indicates that the range of the target is beyond the maximum range in data item I048/040.In this case – and this case only - the ERR Data Item in the Reserved Expansion Field shall provide the range value of the Measured Position in Polar Coordinates. 5. This octet allows to separate reporting of the system and the service status as in particular in distributed systems it is possible that the degraded system state may not have an impact on the service state. For reasons of backwards compatibility (for systems that are not yet capable to decode the first extension), the system and service status shall be propagated to the field SSTAT in the primary part of I025/100, bits 5/2 according to the following table: :: SeSTAT SySTAT SSTAT 0 0 0 0 1 1 0 2 2 0 3 1 1 0 1 1 1 1 1 2 1 1 3 1 2 0 2 2 1 1 2 2 2 2 3 1 3 0 1 3 1 1 3 2 1 3 3 1 The value of 3 'Undefined' is assumed to represent that the status cannot be determined. This inherently indicates a failure in system monitoring. Therefore, a value of 3 'Undefined' is equivalent to 1 'Failed', leading to rejection of data and prompting maintenance/operator investigation to occur. The population of SSTAT is determined to be the worst-case combination of SeSTAT and SySTAT, taking into account Note 1, where the hierarchy of best to worst case is as follows: Running, Degraded, Failed. 105 "System and Service Error Codes" definition Error Status of the System and the Service. repetitive 8 element 8 table 0: No error detected (shall not be sent) 1: Error Code Undefined 2: Time Source Invalid 3: Time Source Coasting 4: Track ID numbering has restarted 5: Data Processor Overload 6: Ground Interface Data Communications Overload 7: System stopped by operator 8: CBIT failed 9: Test Target Failure 10: Reserved for allocation by the AMG 11: Reserved for allocation by the AMG 12: Reserved for allocation by the AMG 13: Reserved for allocation by the AMG 14: Reserved for allocation by the AMG 15: Reserved for allocation by the AMG 16: Reserved for allocation by the AMG 17: Reserved for allocation by the AMG 18: Reserved for allocation by the AMG 19: Reserved for allocation by the AMG 20: Reserved for allocation by the AMG 21: Reserved for allocation by the AMG 22: Reserved for allocation by the AMG 23: Reserved for allocation by the AMG 24: Reserved for allocation by the AMG 25: Reserved for allocation by the AMG 26: Reserved for allocation by the AMG 27: Reserved for allocation by the AMG 28: Reserved for allocation by the AMG 29: Reserved for allocation by the AMG 30: Reserved for allocation by the AMG 31: Reserved for allocation by the AMG 32: Reserved for allocation by system manufacturers 33: Reserved for allocation by system manufacturers 34: Reserved for allocation by system manufacturers 35: Reserved for allocation by system manufacturers 36: Reserved for allocation by system manufacturers 37: Reserved for allocation by system manufacturers 38: Reserved for allocation by system manufacturers 39: Reserved for allocation by system manufacturers 40: Reserved for allocation by system manufacturers 41: Reserved for allocation by system manufacturers 42: Reserved for allocation by system manufacturers 43: Reserved for allocation by system manufacturers 44: Reserved for allocation by system manufacturers 45: Reserved for allocation by system manufacturers 46: Reserved for allocation by system manufacturers 47: Reserved for allocation by system manufacturers 48: Reserved for allocation by system manufacturers 49: Reserved for allocation by system manufacturers 50: Reserved for allocation by system manufacturers 51: Reserved for allocation by system manufacturers 52: Reserved for allocation by system manufacturers 53: Reserved for allocation by system manufacturers 54: Reserved for allocation by system manufacturers 55: Reserved for allocation by system manufacturers 56: Reserved for allocation by system manufacturers 57: Reserved for allocation by system manufacturers 58: Reserved for allocation by system manufacturers 59: Reserved for allocation by system manufacturers 60: Reserved for allocation by system manufacturers 61: Reserved for allocation by system manufacturers 62: Reserved for allocation by system manufacturers 63: Reserved for allocation by system manufacturers 64: Reserved for allocation by system manufacturers 65: Reserved for allocation by system manufacturers 66: Reserved for allocation by system manufacturers 67: Reserved for allocation by system manufacturers 68: Reserved for allocation by system manufacturers 69: Reserved for allocation by system manufacturers 70: Reserved for allocation by system manufacturers 71: Reserved for allocation by system manufacturers 72: Reserved for allocation by system manufacturers 73: Reserved for allocation by system manufacturers 74: Reserved for allocation by system manufacturers 75: Reserved for allocation by system manufacturers 76: Reserved for allocation by system manufacturers 77: Reserved for allocation by system manufacturers 78: Reserved for allocation by system manufacturers 79: Reserved for allocation by system manufacturers 80: Reserved for allocation by system manufacturers 81: Reserved for allocation by system manufacturers 82: Reserved for allocation by system manufacturers 83: Reserved for allocation by system manufacturers 84: Reserved for allocation by system manufacturers 85: Reserved for allocation by system manufacturers 86: Reserved for allocation by system manufacturers 87: Reserved for allocation by system manufacturers 88: Reserved for allocation by system manufacturers 89: Reserved for allocation by system manufacturers 90: Reserved for allocation by system manufacturers 91: Reserved for allocation by system manufacturers 92: Reserved for allocation by system manufacturers 93: Reserved for allocation by system manufacturers 94: Reserved for allocation by system manufacturers 95: Reserved for allocation by system manufacturers 96: Reserved for allocation by system manufacturers 97: Reserved for allocation by system manufacturers 98: Reserved for allocation by system manufacturers 99: Reserved for allocation by system manufacturers 100: Reserved for allocation by system manufacturers 101: Reserved for allocation by system manufacturers 102: Reserved for allocation by system manufacturers 103: Reserved for allocation by system manufacturers 104: Reserved for allocation by system manufacturers 105: Reserved for allocation by system manufacturers 106: Reserved for allocation by system manufacturers 107: Reserved for allocation by system manufacturers 108: Reserved for allocation by system manufacturers 109: Reserved for allocation by system manufacturers 110: Reserved for allocation by system manufacturers 111: Reserved for allocation by system manufacturers 112: Reserved for allocation by system manufacturers 113: Reserved for allocation by system manufacturers 114: Reserved for allocation by system manufacturers 115: Reserved for allocation by system manufacturers 116: Reserved for allocation by system manufacturers 117: Reserved for allocation by system manufacturers 118: Reserved for allocation by 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allocation by system manufacturers 138: Reserved for allocation by system manufacturers 139: Reserved for allocation by system manufacturers 140: Reserved for allocation by system manufacturers 141: Reserved for allocation by system manufacturers 142: Reserved for allocation by system manufacturers 143: Reserved for allocation by system manufacturers 144: Reserved for allocation by system manufacturers 145: Reserved for allocation by system manufacturers 146: Reserved for allocation by system manufacturers 147: Reserved for allocation by system manufacturers 148: Reserved for allocation by system manufacturers 149: Reserved for allocation by system manufacturers 150: Reserved for allocation by system manufacturers 151: Reserved for allocation by system manufacturers 152: Reserved for allocation by system manufacturers 153: Reserved for allocation by system manufacturers 154: Reserved for allocation by system manufacturers 155: Reserved for allocation by system manufacturers 156: Reserved for allocation by system manufacturers 157: Reserved for allocation by system manufacturers 158: Reserved for allocation by system manufacturers 159: Reserved for allocation by system manufacturers 160: Reserved for allocation by system manufacturers 161: Reserved for allocation by system manufacturers 162: Reserved for allocation by system manufacturers 163: Reserved for allocation by system manufacturers 164: Reserved for allocation by system manufacturers 165: Reserved for allocation by system manufacturers 166: Reserved for allocation by system manufacturers 167: Reserved for allocation by system manufacturers 168: Reserved for allocation by system manufacturers 169: Reserved for allocation by system manufacturers 170: Reserved for allocation by system manufacturers 171: Reserved for allocation by system manufacturers 172: Reserved for allocation by system manufacturers 173: Reserved for allocation by system manufacturers 174: Reserved for allocation by system manufacturers 175: Reserved for allocation by system manufacturers 176: Reserved for allocation by system manufacturers 177: Reserved for allocation by system manufacturers 178: Reserved for allocation by system manufacturers 179: Reserved for allocation by system manufacturers 180: Reserved for allocation by system manufacturers 181: Reserved for allocation by system manufacturers 182: Reserved for allocation by system manufacturers 183: Reserved for allocation by system manufacturers 184: Reserved for allocation by system manufacturers 185: Reserved for allocation by system manufacturers 186: Reserved for allocation by system manufacturers 187: Reserved for allocation by system manufacturers 188: Reserved for allocation by system manufacturers 189: Reserved for allocation by system manufacturers 190: Reserved for allocation by system manufacturers 191: Reserved for allocation by system manufacturers 192: Reserved for allocation by system manufacturers 193: Reserved for allocation by system manufacturers 194: Reserved for allocation by system manufacturers 195: Reserved for allocation by system manufacturers 196: Reserved for allocation by system manufacturers 197: Reserved for allocation by system manufacturers 198: Reserved for allocation by system manufacturers 199: Reserved for allocation by system manufacturers 200: Reserved for allocation by system manufacturers 201: Reserved for allocation by system manufacturers 202: Reserved for allocation by system manufacturers 203: Reserved for allocation by system manufacturers 204: Reserved for allocation by system manufacturers 205: Reserved for allocation by system manufacturers 206: Reserved for allocation by system manufacturers 207: Reserved for allocation by system manufacturers 208: Reserved for allocation by system manufacturers 209: Reserved for allocation by system manufacturers 210: Reserved for allocation by system manufacturers 211: Reserved for allocation by system manufacturers 212: Reserved for allocation by system manufacturers 213: Reserved for allocation by system manufacturers 214: Reserved for allocation by system manufacturers 215: Reserved for allocation by system manufacturers 216: Reserved for allocation by system manufacturers 217: Reserved for allocation by system manufacturers 218: Reserved for allocation by system manufacturers 219: Reserved for allocation by system manufacturers 220: Reserved for allocation by system manufacturers 221: Reserved for allocation by system manufacturers 222: Reserved for allocation by system manufacturers 223: Reserved for allocation by system manufacturers 224: Reserved for allocation by system manufacturers 225: Reserved for allocation by system manufacturers 226: Reserved for allocation by system manufacturers 227: Reserved for allocation by system manufacturers 228: Reserved for allocation by system manufacturers 229: Reserved for allocation by system manufacturers 230: Reserved for allocation by system manufacturers 231: Reserved for allocation by system manufacturers 232: Reserved for allocation by system manufacturers 233: Reserved for allocation by system manufacturers 234: Reserved for allocation by system manufacturers 235: Reserved for allocation by system manufacturers 236: Reserved for allocation by system manufacturers 237: Reserved for allocation by system manufacturers 238: Reserved for allocation by system manufacturers 239: Reserved for allocation by system manufacturers 240: Reserved for allocation by system manufacturers 241: Reserved for allocation by system manufacturers 242: Reserved for allocation by system manufacturers 243: Reserved for allocation by system manufacturers 244: Reserved for allocation by system manufacturers 245: Reserved for allocation by system manufacturers 246: Reserved for allocation by system manufacturers 247: Reserved for allocation by system manufacturers 248: Reserved for allocation by system manufacturers 249: Reserved for allocation by system manufacturers 250: Reserved for allocation by system manufacturers 251: Reserved for allocation by system manufacturers 252: Reserved for allocation by system manufacturers 253: Reserved for allocation by system manufacturers 254: Reserved for allocation by system manufacturers 255: Reserved for allocation by system manufacturers remark Notes: 1. The Warning & Error codes contain information about the reason why the System and Service State (SSTAT in item I025/100) is different from “running”. 2. A time source is considered as valid when either externally synchronised or running on a local oscillator within the required accuracy of UTC. 3. A value of 4 indicates that the allocation of Track-IDs was re-started. 4. Multiple error codes can be transmitted within the same ASTERIX record. 5. Error codes in the range 0 to 31 shall be allocated centrally by the AMG. Error codes in the range from 32 to 255 are available for specification by the system manufacturers. They are not standardised and shall be described in the Interface Control Document (ICD) of the respective system. 120 "Component Status" definition Indications of status of various system components and, when applicable, error codes. repetitive 8 group CID "Component ID" element 16 raw ERRC "Error Code" element 6 table 0: No Error Detected 1: Error Code Undefined 2: Reserved for allocation by the AMG 3: Reserved for allocation by the AMG 4: Reserved for allocation by the AMG 5: Reserved for allocation by the AMG 6: Reserved for allocation by the AMG 7: Reserved for allocation by the AMG 8: Reserved for allocation by the AMG 9: Reserved for allocation by the AMG 10: Reserved for allocation by the AMG 11: Reserved for allocation by the AMG 12: Reserved for allocation by the AMG 13: Reserved for allocation by the AMG 14: Reserved for allocation by the AMG 15: Reserved for allocation by the AMG 16: Reserved for allocation by system manufacturers 17: Reserved for allocation by system manufacturers 18: Reserved for allocation by system manufacturers 19: Reserved for allocation by system manufacturers 20: Reserved for allocation by system manufacturers 21: Reserved for allocation by system manufacturers 22: Reserved for allocation by system manufacturers 23: Reserved for allocation by system manufacturers 24: Reserved for allocation by system manufacturers 25: Reserved for allocation by system manufacturers 26: Reserved for allocation by system manufacturers 27: Reserved for allocation by system manufacturers 28: Reserved for allocation by system manufacturers 29: Reserved for allocation by system manufacturers 30: Reserved for allocation by system manufacturers 31: Reserved for allocation by system manufacturers 32: Reserved for allocation by system manufacturers 33: Reserved for allocation by system manufacturers 34: Reserved for allocation by system manufacturers 35: Reserved for allocation by system manufacturers 36: Reserved for allocation by system manufacturers 37: Reserved for allocation by system manufacturers 38: Reserved for allocation by system manufacturers 39: Reserved for allocation by system manufacturers 40: Reserved for allocation by system manufacturers 41: Reserved for allocation by system manufacturers 42: Reserved for allocation by system manufacturers 43: Reserved for allocation by system manufacturers 44: Reserved for allocation by system manufacturers 45: Reserved for allocation by system manufacturers 46: Reserved for allocation by system manufacturers 47: Reserved for allocation by system manufacturers 48: Reserved for allocation by system manufacturers 49: Reserved for allocation by system manufacturers 50: Reserved for allocation by system manufacturers 51: Reserved for allocation by system manufacturers 52: Reserved for allocation by system manufacturers 53: Reserved for allocation by system manufacturers 54: Reserved for allocation by system manufacturers 55: Reserved for allocation by system manufacturers 56: Reserved for allocation by system manufacturers 57: Reserved for allocation by system manufacturers 58: Reserved for allocation by system manufacturers 59: Reserved for allocation by system manufacturers 60: Reserved for allocation by system manufacturers 61: Reserved for allocation by system manufacturers 62: Reserved for allocation by system manufacturers 63: Reserved for allocation by system manufacturers CS "Component State/Mode" element 2 table 0: Running 1: Failed 2: Maintenance 3: Reserved remark Note: - Error codes in the range 2 to 15 shall be allocated centrally by the AMG. Error codes in the range from 16 to 63 are available for specification by the system manufacturers. They are not standardised and shall be described in the Interface Control Document (ICD) of the respective system. 140 "Service Statistics" definition Statistics concerning the service. Provides counts of various message types that have been received since the report was last sent. repetitive 8 group TYPE "Type of Report Counter" element 8 table 0: Number of unknown messages received 1: Number of too old messages received 2: Number of failed message conversions 3: Total Number of messages received 4: Total number of messages transmitted 5: Reserved for AMG 6: Reserved for AMG 7: Reserved for AMG 8: Reserved for AMG 9: Reserved for AMG 10: Reserved for AMG 11: Reserved for AMG 12: Reserved for AMG 13: Reserved for AMG 14: Reserved for AMG 15: Reserved for AMG 16: Reserved for AMG 17: Reserved for AMG 18: Reserved for AMG 19: Reserved for AMG 20: Implementation specific 21: Implementation specific 22: Implementation specific 23: Implementation specific 24: Implementation specific 25: Implementation specific 26: Implementation specific 27: Implementation specific 28: Implementation specific 29: Implementation specific 30: Implementation specific 31: Implementation 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specific 241: Implementation specific 242: Implementation specific 243: Implementation specific 244: Implementation specific 245: Implementation specific 246: Implementation specific 247: Implementation specific 248: Implementation specific 249: Implementation specific 250: Implementation specific 251: Implementation specific 252: Implementation specific 253: Implementation specific 254: Implementation specific 255: Implementation specific REF "Reference from which the Messages Are Counted" element 1 table 0: From UTC midnight 1: From the previous report spare 7 COUNT "Counter Value" element 32 unsigned integer remark Note: - There is no special significance attributed to the numbering of the TYPE field. However the range from 0 to 19 is intended to cover generic messages which may be applicable to many types of service. 200 "Message Identification" definition Identification of a unique message. element 24 unsigned integer remark Notes: 1. The Message Identification Number is to be used to uniquely identify each message. If messages are being sent on redundant links then this number shall be identical for the same message on each link. This will allow the receiver to easily identify and discard duplicate messages. 2. It is not required that Message Identification Numbers be assigned in ascending order by time of message transmission. 600 "Position of the System Reference Point" definition Position of the reference point in WGS-84 Coordinates. group LAT "Latitude" element 32 signed quantity 180/2^32 "°" >= -90 < 90 LON "Longitude" element 32 signed quantity 180/2^32 "°" >= -180 < 180 remark Notes: - Positive longitude indicates East. Positive latitude indicates North. 610 "Height of the System Reference Point" definition Height of the system reference point in two’s complement form. The height shall use mean sea level as the zero reference level. element 16 signed quantity 1/2^2 "m" >= -8192 <= 32767/4 remark Notes: - Item I025/610 shall only be sent together with item I025/600 “Position of the System Reference Point”. SP "Special Purpose Field" definition Special Purpose Field explicit sp uap 010 000 200 015 020 070 100 105 120 140 SP 600 610