Title: ADS & CPDLC - METLINKSG Review of ATN SARPs Edition 3 PDR Reference: M1010002 Originator Reference: SARPs Document Reference: ADS, Section 2.2.1.1.2 CPDLC, Section 2.3.4.2.1 Status: ADOPTED Impact: E (ADS), C (CPDLC), A (FIS) PDR Revision Date: 30/01/02 (RESOLVED -> ADOPTED) 05/03/01 (ACCEPTED -> RESOLVED) 20/02/01 (SUBMITTED -> ACCEPTED) PDR Submission Date: 02/01/01 Submitting State/Organization: STNA Submitting Author Name: Picard, F Submitting Author E-mail Address: picard_frederic@stna.dgac.fr Submitting Author Supplemental Contact Information: tel. +33.5.62.14.55.33 fax. +33.5.62.14.54.01 SARPs Date: Doc 9705 Draft Ed 3 (ICAO web site - 11/00) SARPs Language: English Summary of Defect: The following comments on the Sub-Volume II of the Manual of Technical Provisions for the ATN have been produced by the METLINKSG secretary (message date 02/01/01): Reference is made to the draft Sub-Volume II which was sent to the Secretaries of the relevant panels and study groups for comment. It is noted with pleasure that the most recent versions (i.e. "Extended MET info" in the case of the ADS message and "Version 2" in the case of FIS messages) have been fully aligned with the Annex 3 - Meteorological Service for International Air Navigation provisions. Therefore, there are few suggestions which are related to the "last-minute" changes introduced as a result of the final review by the Air Navigation Commission (ANC) (Note that the earlier versions were not reviewed and that the comments hereunder refer to the updated versions as it is understood that it would not be possible to amend the earlier versions at this stage): ADS a) Page II-113, item v). It should read: "meteorological information, indicating wind direction, wind speed, temperature and turbulence (intensity), and in version 2, wind direction, wind speed, wind quality flag, temperature, turbulence (index and time of occurrence) and humidity." (reason: the time of occurrence of turbulence cannot be separated from the turbulence index since, as a stand-alone value, it would be of no use); CPDLC b) Page II-326. The range and resolution of the altimeter(metric) should read "range (850...1100)" and "resolution = 1"; c) Page II-332. According to the Procedures for Air Navigation Services - Rules of the Air and Air Traffic Services (PANS-RAC, Doc 4444), there are only "light", " moderate" and "severe" icing; therefore, the category (0) should be deleted (or labelled "nil"); d) Page II-343. The resolution for "RVR Meters" should be amended to read: 25 m for RVR (0...400); 50 m for RVR (400...800) and 100 m for RVR (800..1500); e) Page II-348. The ranges and resolutions for "Wind Speed English" and "Wind Speed Metric" should read (0...250), resolution = 1 and (0...500), resolution = 2, respectively; FIS (only Version 2 commented on) f) Page II-513. The ranges for the wind speed should be amended to read (0...399) if expressed in km/h, (0...199) if expressed in kt and (0...99) if expressed in m/s (reason: the ranges were amended as a result of the final review by the ANC); ==> See PDR M0110002. g) Pages II-523 and II-524. Under "Extended Runway Designator", provision should be made for the use of code figure "88" (i.e. all runways), which is used in the EUR region. Furthermore, it may be noted that the term "SNOCLO" is used in lieu of the "Runway state" group when the aerodrome is closed due to extreme deposit of snow (note: the latter change was omitted due to an oversight in the initial amendment proposal to Annex 3 but it has since been introduced in Amendment 72 to Annex 3 which will be considered by the ICAO Council in March 2001). Assigned SME: Sub-Volume II SME Proposed SARPs amendment: ADS-1/ change in section 2.2.1.1.2 note 3 b) 3) v) replace: v) meteorological information, indicating wind speed, wind direction, temperature and turbulence (time of occurence), and in version 2 turbulence (index) and humidity; by: v) meteorological information, indicating wind direction, wind speed, temperature and turbulence (intensity), and in version 2, wind direction, wind speed, wind quality flag, temperature, turbulence (index and time of occurrence) and humidity. CPDLC-1/ The current ASN.1 definition matches technically the operational requirement. No change is proposed. AltimeterMetric ::= INTEGER (7500..12500) -- unit = Hectopascal, Range (750.0..1250.0), resolution= 0.1 CPDLC-3/ in section 2.3.4.2.1, replace: Icing ::= ENUMERATED { trace (0), light (1), moderate (2), severe (3) } by: Icing ::= ENUMERATED { reserved (0), light (1), moderate (2), severe (3) } CPDLC-2/ RVR - The current ASN.1 definition matches technically the operational requirement (with a smaller resolution). No change is proposed. CPDLC-3/ Wind Speed - The current ASN.1 definition matches technically the operational requirement (with a smaller resolution). No change is proposed. FIS-1/ In section 2.4.4.3.1, change from: ExtendedRunwayDesignator ::= CHOICE { runwayDesignator [0] RunwayDesignator, other [1] INTEGER (51..86), ninetynine [2] NULL, } to: ExtendedRunwayDesignator ::= CHOICE { runwayDesignator [0] RunwayDesignator, other [1] INTEGER (51..86), allRunways [2] INTEGER (88), notAvailable [3] INTEGER (99) } FIS-2/ In section 2.4.4.3.1, change from: RunwayState ::= SEQUENCE { extendedRunwayDesignator [0] ExtendedRunwayDesignator, runwayDeposit [1] INTEGER (0..9) OPTIONAL, contaminationExtent [2] ContaminationExtent OPTIONAL, runwayDepositDepth [3] RunwayDepositDepth OPTIONAL, frictionCoefficient [4] FrictionCoefficient OPTIONAL } by: RunwayState ::= CHOICE { runwayStateGroup [0] RunwayStateGroup, aerodromeClosedSNOCLO [1] NULL } RunwayStateGroup ::= SEQUENCE { extendedRunwayDesignator [0] ExtendedRunwayDesignator, runwayDeposit [1] INTEGER (0..9) OPTIONAL, contaminationExtent [2] ContaminationExtent OPTIONAL, runwayDepositDepth [3] RunwayDepositDepth OPTIONAL, frictionCoefficient [4] FrictionCoefficient OPTIONAL } Impact on interoperability: - PDR Validation Status: SME Recommendation to CCB: - CCB Decision: atnp_ccb_chair: SUBMITTED (02/01/01) atnp_ccb_chair: ACCEPTED (20/02/01) CCB-13/2 (Honolulu): RESOLVED (05/03/01)