Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 1 Status of AP-RARS implementation at Tokyo Japan Meteorological Agency Prepared by A. Nakazono, T. Saito, H. Murata Presented by Y. Takeuchi

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 2 Contents Contents Brief History Brief History Network Configuration Network Configuration Coverage Coverage Available Times Available Times Traffic Analysis Traffic Analysis Standardization issues Standardization issues File NamingFile Naming TelecommunicationTelecommunication Requirements of JMA Requirements of JMA Summary Summary

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 3 Significance of RARS Filling the geographical gap for near real-time use Filling the geographical gap for near real-time use Complementary reception of different satellites with adjacent local passing time Complementary reception of different satellites with adjacent local passing time Backup by the neighbor site at outage, maintenance, replace of a reception site Backup by the neighbor site at outage, maintenance, replace of a reception site

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 4 Brief History 1-3 June June 2005 Establishment of AP-RARS and exchange of AAPP data through the GTS were agreed in the APSDEU-6 meeting at Seoul/Republic of Korea Establishment of AP-RARS and exchange of AAPP data through the GTS were agreed in the APSDEU-6 meeting at Seoul/Republic of Korea 1-2 Dec Dec 2005 Detailed AP-RARS implementation schedule for 12 HRPT stations was coordinated and agreed at the 2 nd WMO World RARS and ADM Workshop, Geneva Detailed AP-RARS implementation schedule for 12 HRPT stations was coordinated and agreed at the 2 nd WMO World RARS and ADM Workshop, Geneva 7 June June 2006 BoM, CMA and JMA started pilot exchange of AAPP Level-1C data from 8 HRPT stations through GTS circuits; i.e. Tokyo- Melbourne and Tokyo-Beijing. BoM, CMA and JMA started pilot exchange of AAPP Level-1C data from 8 HRPT stations through GTS circuits; i.e. Tokyo- Melbourne and Tokyo-Beijing. 21 August August 2006 JMA started providing the data from Syowa HRPT Station, Antarctica. JMA started providing the data from Syowa HRPT Station, Antarctica. 15 September September 2006 Communication test to start between JMA and KMA; Seoul will be the 10 th HRPT station Communication test to start between JMA and KMA; Seoul will be the 10 th HRPT station

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 5 Kiyose (Tokyo) Seoul Beijing Guangzhou Urumuqi Crib Point 1 Crib Point 2 (Melbourne) Darwin Perth Syowa Network Configuration (as of August 2006) GTS circuits Domestic links HRPT receiving stations HRPT receiving sites (planned for September 2006)

APSDEU-7, Honolulu/Hawaii6 Sep 20-22, 2006 Data Flow of Syowa Data  INTELSAT  1Mbps National Institute of Polar Research JMA/HQ RSMC server  FEB AUG OCT  GSM fcst 81MB/day  Wave model fcst 2MB/day  (GRIB 1.25deg) JMA/MSC RV Shirase Dome Fuji NOAA & SSM/I Direct Broadcast Assimilation & Forecast  AAPP L1C Proc. HRPT & TIP  Products (Map, Time sequence)  FEB AUG SEP Syowa base BoM & CMA (c) NIPR AUG 2006-

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 7 Implemented Coverage Coverage (as of August 2006)

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 8 A vista example

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 9 Available Time at Tokyo Site ID : CPT (Cribpoint) Sampling Days : Sep/2-Sep/13,2006 (12 days) Total Number of Files : 537 Rate of Files Received within 30 min : 89.2% 50% Files are Received within 26 min 80% Files are Received within 28 min 90% Files are Received within 32 min Averaged Time : 32.1 min Elapsed time from compilation of a file to reception at RTH Tokyo: 2 to 5 minutes

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 10 Available Time at Tokyo Site ID : MEL (Melbourne) Sampling Days : Sep/2-Sep/13,2006 (12 days) Total Number of Files : 111 Rate of Files Received within 30 min : 100.0% 50% Files are Received within 22 min 80% Files are Received within 22 min 90% Files are Received within 22 min Averaged Time : 18.9 min Elapsed time from compilation of a file to reception at RTH Tokyo: 2 to 5 minutes

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 11 Available Time at Tokyo Site ID : DAR (Darwin) Sampling Days : Sep/2-Sep/13,2006 (12 days) Total Number of Files : 339 Rate of Files Received within 30 min : 46.0% 50% Files are Received within 32 min 80% Files are Received within 34 min 90% Files are Received within 36 min Averaged Time : 30.2 min Elapsed time from compilation of a file to reception at RTH Tokyo: 2 to 5 minutes

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 12 Available Time at Tokyo Site ID : PTH (Perth) Sampling Days : Sep/2-Sep/13,2006 (12 days) Total Number of Files : 438 Rate of Files Received within 30 min : 54.8% 50% Files are Received within 30 min 80% Files are Received within 34 min 90% Files are Received within 38 min Averaged Time : 30.8 min Elapsed time from compilation of a file to reception at RTH Tokyo: 2 to 6 minutes

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 13 Available Time at Tokyo Site ID : pek (China) Sampling Days : Sep/2-Sep/13,2006 (12 days) Total Number of Files : 836 Rate of Files Received within 30 min : 5.0% 50% Files are Received within 56 min 80% Files are Received within 70 min 90% Files are Received within 110 min Averaged Time : 72.0 min Elapsed time from compilation of a file to reception at RTH Tokyo: 9 to 18 minutes

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 14 Available Time at Tokyo Site ID : kiy (Kiyose/Tokyo) Sampling Days : Sep/2-Sep/13,2006 (12 days) Total Number of Files : 336 Rate of Files Received within 30 min : 78.9% 50% Files are Received within 16 min 80% Files are Received within 32 min 90% Files are Received within 60 min Averaged Time : 23.6 min

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 15 Available Time at Tokyo Site ID : syo (Syowa/Antarctica) Sampling Days : Sep/2-Sep/13,2006 (12 days) Total Number of Files : 245 Rate of Files Received within 30 min : 81.6% 50% Files are Received within 24 min 80% Files are Received within 28 min 90% Files are Received within 44 min Averaged Time : 28.4 min

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 16 Traffic Analysis CIR: Committed Information Rate CIR 28% of CIR

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 17 Traffic Analysis CIR: Committed Information Rate 83% of CIR CIR

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 18 Implementation of the File Naming Convention Basic Rule on the GTS Basic Rule on the GTS Defined in the WMO Manual on the GTS, Attachment II-15 Defined in the WMO Manual on the GTS, Attachment II-15 AP-RARS Convention AP-RARS Convention Z_RARS_C_ cccc _ yyyyMMddhhmmss _R rrr _ AAPP filename _bufr.bin Z_RARS_C_ cccc _ yyyyMMddhhmmss _R rrr _ AAPP filename _bufr.bin cccc: Location Indicator of the centre that compiled the file (e.g. RJTD for Tokyo);cccc: Location Indicator of the centre that compiled the file (e.g. RJTD for Tokyo); yyyyMMddhhmmss: time of compilation in UTC;yyyyMMddhhmmss: time of compilation in UTC; rrr: Identifier of HRPT receiving station; should be determined in coordination with WMOrrr: Identifier of HRPT receiving station; should be determined in coordination with WMO AAPP filename: Actual AAPP filename. The dot (.) character in the AAPP filename shall be replaced by a minus (-) sign or underscore (_).AAPP filename: Actual AAPP filename. The dot (.) character in the AAPP filename shall be replaced by a minus (-) sign or underscore (_).

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 19 Real File Names in use Real examples in use Z_RARS_C_AMMC_ _RMEL_aman_l1c_bufr.bin Z_RARS_C_BAWX_ _Rpek_amsua_ _0248_noaa17_20435_PEK_l1c_bufr.bin Z_RARS_C_RJTD_ _Rkiy_amsual1c_noaa17_ _0233_19453_l1c_bufr.bin Real examples in use Z_RARS_C_AMMC_ _RMEL_aman_l1c_bufr.bin Z_RARS_C_BAWX_ _Rpek_amsua_ _0248_noaa17_20435_PEK_l1c_bufr.bin Z_RARS_C_RJTD_ _Rkiy_amsual1c_noaa17_ _0233_19453_l1c_bufr.bin Discrepancy in file naming between centers exist; especially AAPP file names as shown in orange in the examples above differ each other Discrepancy in file naming between centers exist; especially AAPP file names as shown in orange in the examples above differ each other Station identifiers (rrr) are assigned in non- coordinated manner: Station identifiers (rrr) are assigned in non- coordinated manner: CPT: Crib Point, Australia DAR: Darwin, Australia kiy: Kiyose, Japan MEL: Crib Point, Australia pek: Beijing/Guangzhou/Urumuqi, China PTH: Perth, Australia syo: Syowa Base, Antarctica (Japan) seo: Seoul, Republic of Korea (planned)

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 20 Z_RARS_C_ cccc _ yyyyMMddhhmmss _R rrr _ (AAPP filename) _bufr.bin ① ② ③ BoMCMAJMAKMA ①CompilationTimeCompilationTime Reception Time ②ReceivingStationCollection Centre ? ReceivingStationReceivingStation ③ AAPP temporally EARSAAPP_RUNAAPP_RUN BoM ： Z_RARS_C_AMMC_ _RMEL_hrsn_l1c_bufr.bin CMA ： Z_RARS_C_BAWX_ _Rpek_hirs_ _0728_noaa18_06175_PEK_l1c_bufr.bin JMA ： Z_RARS_C_RJTD_ _Rkiy_hirsl1c_noaa18_ _0546_06173_l1c_bufr.bin KMA ： Z_RARS_C_RKSL_ _Rseo_hirsl1c_noaa17_ _0045_21316_l1c_bufr.bin Discrepancy of naming between centers

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 21 Telecommunication Procedures An ATOVS file is transferred by FTP-put whenever it becomes available for transmission. An ATOVS file is transferred by FTP-put whenever it becomes available for transmission. Procedures applied are basically in compliance with WMO standards prescribed in the Manual on the GTS, Attachment II-15 (file naming; re- naming with the temporal extension ‘.tmp ’ ). Procedures applied are basically in compliance with WMO standards prescribed in the Manual on the GTS, Attachment II-15 (file naming; re- naming with the temporal extension ‘.tmp ’ ). Telecommunication procedures are coordinated between GTS operators as the matter of GTS link; no further coordination is required for RARS. Telecommunication procedures are coordinated between GTS operators as the matter of GTS link; no further coordination is required for RARS.

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 22 Requirements of JMA to RARS Extension of reception sites Singapore, Honolulu are essential to enlarge the AP-RARS coverage. Extension of reception sites Singapore, Honolulu are essential to enlarge the AP-RARS coverage. Initiate the inter-regional exchange EARS & SA-RARS data from Washington to Tokyo (AP-RARS data could be sent from Tokyo to Washington if necessary) Initiate the inter-regional exchange EARS & SA-RARS data from Washington to Tokyo (AP-RARS data could be sent from Tokyo to Washington if necessary) Extension of AP-RARS to Metop/ATOVS, ASCAT Extension of AP-RARS to Metop/ATOVS, ASCAT

Sep 20-22, 2006 APSDEU-7, Honolulu/Hawaii 23Summary AP-RARS has started its initial operation in June 2006, in collaboration of BoM, CMA and JMA; KMA has started at 20 September AP-RARS has started its initial operation in June 2006, in collaboration of BoM, CMA and JMA; KMA has started at 20 September Currently AAPP level-1c data from 10 HRPT receiving stations are exchanged through GTS circuits using the operational file switching system of JMA. Currently AAPP level-1c data from 10 HRPT receiving stations are exchanged through GTS circuits using the operational file switching system of JMA. Further improvements are expected to fulfill the RARS requirement, i.e. 30 minutes timeliness. Further improvements are expected to fulfill the RARS requirement, i.e. 30 minutes timeliness. Traffic analysis shows that GTS links seem to have more spare capacity that could support further AP- RARS exchange. Traffic analysis shows that GTS links seem to have more spare capacity that could support further AP- RARS exchange. Discrepancies between file name implementations are exist; expected to be considered. Discrepancies between file name implementations are exist; expected to be considered.