Спутник ДЗЗ. COMS 1. [Редактировать]

Chollian, (Thousand Li View) также известен как Communication, Ocean and Meteorological Satellite 1(COMS-1), Южно корейский спутник управляемый Корейским аэрокосмическим исследовательским институтом, который используется для связи, океанографии и метеорологических наблюдений. COMS-1 был построенн EADS Astrium и базируется на платформе Eurostar-3000S. Он имел массу около 2460 кг, и нес транспондеры в L/S и Ka диапазоне. его единственная солнечная панель генерирует 2500 ватт энергии. 

Дополнительные наименования

#НаименованияПоиск в новостяхПоиск в документах
1Communication, Ocean and Meteorological SatelliteНайтиНайти
236744НайтиНайти
3COMS-1НайтиНайти
4Communication, Oceanography and Meteorology Satellite - 1НайтиНайти

Дополнительная классификация

#Наименования
1Страна оператор(владелец) - Южная Корея
2Тип оператора(владельца) - государственный
3Тип орбиты - ГСО
4Страна производитель - Южная Корея
5Все спутники ДЗЗ

Технические характеристики

#ХарактеристикаЗначение
1Масса (сухая), кг.1250
2Масса, кг.2460
3Платформа 1xEurostar-3000S
4Полезная нагрузка 1xMI
5Полезная нагрузка 1xGOCI
6Мощность, Вт2500

Характеристики орбиты

#ХарактеристикаЗначение
1Наклонение, град0.0
2Апогей, км35797.8
3Перигей, км35790.2
4Период, минут1436.1
5САС, год7
6Длинный диаметр эллипса, км42164

Пусковые характеристики

#ХарактеристикаЗначение
1Код NSSDC2010-032A

Экономические характеристики

#ХарактеристикаДата измеренияЗначение
1Стоимость (программы), млн. долл.296
2Оператор Космическое агентство Южной Кореи
3Оператор Kompsat 3
4Производитель Astrium
5Производитель Astrium

Информация об удачном запуске

#ХарактеристикаЗначение
1Дата пуска2010-06-26 at 21:41:00 UTC
2Полезная нагрузка 1xCOMS 1
3Полезная нагрузка 1xArabsat 5A
4Ракета-носитель 1xАриан 5 ECA

Найдено 489 документов по запросу «COMS 1». [Перейти к поиску]


Дата загрузки: 2017-01-23
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... THE FLIGHT DYNAMICS SYSTEM FOR COMS SATELLITE Byoung-Sun Lee(1), Yoola..., kby@kari.re.kr Keywords: COMS, flight dynamics, station-keeping, orbit...: As a multi-mission GEO satellite, COMS has three payloads including Ka... color imager, and meteorological imager. COMS flight dynamics system provides the... of the major functions in COMS flight dynamics system is presented... month of operations period. Keywords: COMS, flight dynamics, station-keeping, orbit..., Communications, Ocean, and Meteorological Satellite (COMS) was launched in June 26... and two station-acquisition maneuvers, COMS satellite was stationed at 128... July 4, 2010. Since then, the COMS satellite ground control system [1] is... operations, and satellite simulation. The COMS satellite has three payloads including... Meteorological Imager (MI). Although the COMS spacecraft bus is based on... attitude with 5 wheels and 7 thrusters, COMS should perform twice a day Wheel... affect on the satellite orbit [2]. COMS Flight Dynamics System (FDS) provides... methodology was applied to the COMS FDS development [3]. Programming language C# within... used for the implementation of COMS flight dynamics system on Windows... of the major functions in COMS FDS is presented for the... is very important because the COMS FDS is newly developed and firstly applied to COMS satellite operations. The another newly... singularity in longitudinal separation between COMS satellite and Daejeon station. Weekly... year oscillator were calculated in COMS FDS. The updated oscillator parameters... the geometrical singularity between the COMS satellite longitude of 128.2° and... bias estimation by orbit determination COMS OD uses high fidelity dynamic...) is used to adjust COMS orbit every day. COMS satellite position, velocity... respectively in order to maintain COMS within 128.2°±0.05° longitude and... side effect caused by NSSK [7]. COMS FDS provides three kinds of... updated after fuel accounting. Figure 5. COMS station keeping window Maneuver Table...-burn :3 MFT 3.2 Wheel Off-Loading COMS satellite has single solar panel... generated by single solar panel, COMS should perform twice-a-day WOL... in fuel accounting function of COMS FDS. The actual thruster operations...-Vs are based on the COMS spacecraft design. There are some... 3.3 Fuel Accounting Remaining fuel of COMS has been estimated using two... for each used thrusters in COMS satellite were counted to estimate... the orbital speed of the COMS satellite. Figure 7 presents remaining fuel... shown in Figure 8. Table 8 shows COMS satellite mass changes during six... and oxidizer are used. Figure 6. COMS fuel accounting report Figure 7. Remaining...:00:00 Consumed mass Table 8. COMS total mass Dry mass Fuel... in oscillator updating stack in COMS FDS. Table 9 presents updated sidereal... Sensors (IRES) on board the COMS satellite due the Sun and... Earth disk shown in COMS orbital position. The COMS FDS provides the... the Earth 5. Conclusions A newly developed COMS Flight Dynamics System (FDS) has... operated with performance factors. The COMS satellite will be in normal... the functions in COMS FDS. In the mean time, COMS FDS will..., J.-H., and Kim, J., “Design of the COMS satellite ground control system”, Journal... wheel off-loading strategy of COMS”, Proceedings of the 24th AIAA... the flight dynamics system for COMS satellite mission operations”, Acta Astronautica... Kim, B.-Y., “Operational Validation of the COMS Satellite Ground Control System During... Station-Keeping maneuver strategy for COMS satellite using iterative process”, Advances...



Дата загрузки: 2017-01-16
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... need to complete COMS 6001 and two courses (COMS 6009 and one... months; 2-3 semesters) Candidates register for COMS 6000, 6009 and one elective... 1 COMS 6000 AND COMS 6009 SEMESTER 2 COMS 6002 OR COMS 6003 OR COMS 6004 AND COMS... & EDUCATION YEAR II SEMESTER I COMS 7009 SEMESTER 2 COMS 6002 Communication Project Research... MONTHS; SEMESTERS 3-4) Candidates register for COMS 7009 and 7099 (20 credits... meet departmental requirements SEMESTER 2 COMS 7009 COMS 7099 Communication Project Research Methods... MONTHS; 2-3 SEMESTERS) Candidates register for COMS 6001, 6009 and one elective... departmental requirements YEAR I SEMESTER 1 COMS 6001 AND COMS 6009 Topics in Language.../PhD only) OR COMS 6003 OR COMS 6004 AND COMS 6009 Health Communication... Research Methods Seminar 3 (MPhil/PhD) COMS 8009 MPhil Communication Thesis (Written... April) SEMESTER 2 COMS 8009 YEAR IV SEMESTER 1 COMS 8009 SEMESTER 2 COMS 8009 Communication... 3 core courses, including COMS 6001 (12 credits) and COMS 6009 (8 credits), and... months; 2-3 semesters) Candidates register for COMS 6001, 6009, one elective (26... departmental requirements. YEAR I SEMESTER 1 AND 2 COMS 6001 Human Communication Topics - 12... Topics (MPhil, PhD only) AND COMS 6009 Communication Research Methods 1 8 credits..., PhD) SEMESTER 2 COMS 6002 OR COMS 6003 OR COMS 6004 AND COMS 6009 PART... Research Methods Seminar 3 (MPhil / PhD) COMS 8099 PhD Communication Dissertation (Written... April) SEMESTER 2 COMS 8099 YEAR IV SEMESTER 1 COMS 8099 SEMESTER 2 COMS 8099 Health... OFFERED 2016/2017) COURSE CODE: COMS 6000 COURSE TITLE: HUMAN COMMUNICATION... OFFERED 2016/2017) COURSE CODE: COMS 6001 COURSE TITLE: TOPICS IN... OFFERED 2016/2017) COURSE CODE: COMS 6002 COURSE TITLE: HEALTH COMMUNICATION... OFFERED 2016/2017) COURSE CODE: COMS 6003 COURSE TITLE: MEDIA, CULTURE... OFFERED 2016/2017) COURSE CODE: COMS 6004 COURSE TITLE: ORGANISATIONAL AND...: I AND II (2 SEMESTERS) COURSE CODE: COMS 6009 COURSE TITLE: COMMUNICATION RESEARCH...: I AND II (2 SEMESTERS) COURSE CODE: COMS 7009 COURSE TITLE: COMMUNICATION PROJECT...: I AND II (2 SEMESTERS) COURSE CODE: COMS 7099 COURSE TITLE: COMMUNICATION PROJECT...: I AND II (2 SEMESTERS) COURSE CODE: COMS 8009 COURSE TITLE: COMMUNICATION THESIS...: I AND II (2 SEMESTERS) COURSE CODE: COMS 8099 COURSE TITLE: COMMUNICATION DISSERTATION...



Дата загрузки: 2017-01-23
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...<5> COM<4> COM<3> COM<2> COM<1> COM<0> COMS<0> DUMMY<9> DUMMY<10> SEG<103...<61> COM<62> COM<63> COMS<1> DUMMY<13> DUMMY<14> Coordinate... COM59 COM60 COM61 COM62 COM63 COMS Start 1/33 Duty DB1 1/55...:0] COM[27:53] COM[26:0] COMS COMS COMS COMS COMS *NC: No Connection 22 S6B1400X... configured by 66-channel (including 2 COMS channels) common driver and 104... pixels 64 × 104 pixels ♣ ♦ ♥ ♠ Ξ  SEG103 COMS COM0 : COM31 ........... S6B1400X (Bottom View... COM32 : COM63 COMS SEG0 S6B1400X (Top View) SEG103 ........... COMS COM63 : COM32 SEG0... 35. SHL = 0, ADC = 1 56 ♠ Ξ  ........... SEG103 COMS COM0 : COM31 S6B1400X (Top View... 3 COMS Figure 33. SHL = 1, ADC = 1 COM31 : COM0 COMS ♠ Ξ  Figure 34. SHL = 1, ADC = 0 COMS COM63 : COM32 COM31 : COM0 COMS S6B1400X... pixels 54 × 104 pixels ♣ ♦ ♥ ♠ Ξ  SEG103 COMS COM0 : COM26 ........... S6B1400X (Bottom View... COM37 : COM63 COMS SEG0 S6B1400X (Top View) SEG103 ........... COMS COM63 : COM37 SEG0... COMS Figure 37. SHL = 1, ADC = 1 COM26 : COM0 COMS ♠ Ξ  Figure 38. SHL = 1, ADC = 0 COMS COM63 : COM37 COM26 : COM0 COMS S6B1400X... pixels 48 × 104 pixels ♣ ♦ ♥ ♠ Ξ  SEG103 COMS COM0 : COM23 ........... S6B1400X (Bottom View... COM40 : COM63 COMS SEG0 S6B1400X (Top View) SEG103 ........... COMS COM63 : COM40 SEG0... 43. SHL = 0, ADC = 1 58 ♠ Ξ  ........... SEG103 COMS COM0 : COM23 S6B1400X (Top View... 3 COMS Figure 41. SHL = 1, ADC = 1 COM23 : COM0 COMS ♠ Ξ  Figure 42. SHL = 1, ADC = 0 COMS COM63 : COM40 COM23 : COM0 COMS S6B1400X... pixels 32 × 104 pixels ♣ ♦ ♥ ♠ Ξ  SEG103 COMS COM0 : COM15 ........... S6B1400X (Bottom View... COM48 : COM63 COMS SEG0 S6B1400X (Top View) SEG103 ........... COMS COM63 : COM48 SEG0... 3 COMS Figure 45. SHL = 1, ADC = 1 COM15 : COM0 COMS ♠ Ξ  Figure 46. SHL = 1, ADC = 0 COMS COM63 : COM48 COM15 : COM0 COMS S6B1400X...



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... of Functions ................................................ Linking to COMS .................................................................... Linking to COMS by Title ........................................... Declaring an... Records in COMS ......................................................... Accessing Header Fields ........................................... Binding Considerations for COMS .............................. COMS Statements .................................................................. COMS BEGINTRANSACTION Statement ...................... DISABLE Statement .................................................. ENABLE Statement ................................................... COMS ENDTRANSACTION... Attribute ............................... Using SDF PLUS with COMS .................................................. Using COMS Input/Output Headers ............................ Sending... Type ................................................. A Brief Explanation of COMS Service Functions ........................................ COMS Entities ....................................................................................... Installation Data Values... Interfaces Communications Management System (COMS) Extensions The COMS extensions, outlined in Table.... ALGOL programs interact with COMS through the COMS direct-window interface. The... COMS entities by translating COMS values to names and translating names to COMS... 3–1 Using Communications Management System (COMS) Features The COMS interface has created the... System (COMS) Features Linking to COMS An ALGOL program accesses a COMS library by... information relating to COMS libraries is included under “COMS Statements,” “COMS Service Functions... area is included under “COMS BEGINTRANSACTION Statement,” “COMS ENDTRANSACTION Statement,” “RECEIVE Statement... Communications Management System (COMS) Features Using Records in COMS The following pages... System (COMS) Features Binding Considerations for COMS The ALGOL interface to COMS contains... Communications Management System (COMS) Features COMS Statements The COMS interface supports statements that... System (COMS) Features COMS BEGINTRANSACTION Statement ᔭ BEGINTRANSACTION ᔭ ᔭᔴᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔴᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭ♺ ᔸ ᔸ ᔰᔭ ᔭᔯ ♺ᔭᔴᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔴᔭ ᔭᔭᔭᔭᔭᔭᔭᔭᔭ♺ ᔸ ᔸ ᔶᔭ ( ᔭ ᔭ ) ᔭᔷ ᔸ ᔸ ᔶᔭ AUDIT ᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔷ ᔸ ᔸ ᔰᔭ NOAUDIT ᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔯ ♺ᔭᔴᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔴᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔷ ᔸ ᔸ ᔰᔭ ᔭᔯ Explanation The COMS BEGINTRANSACTION... (COMS) Features COMS ENDTRANSACTION Statement ᔭ ENDTRANSACTION ᔭ ᔭᔴᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔴᔭᔭᔭ♺ ᔸ ᔸ ᔶᔭ AUDIT ᔭᔭᔭᔷ ᔸ ᔸ ᔰᔭ NOAUDIT ᔭᔯ ♺ᔭ ᔭᔴᔭᔭᔭᔭᔭᔭᔭᔭᔭᔴᔭᔴᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔴᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔷ ᔸ ᔸ ᔸ ᔸ ᔰᔭ SYNC ᔭᔯ ᔰᔭ ᔭᔯ ᔭ ᔭᔴᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔴᔭᔴᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔭᔴᔭᔭᔭᔭᔷ ᔸ ᔸ ᔸ ᔸ ᔰᔭ [ ᔭ ᔭ ] ᔭᔯ ᔰᔭ ᔭᔯ Explanation The COMS ENDTRANSACTION... Communications Management System (COMS) Features COMS Service Functions COMS service functions are entry... Type,” “COMS Statements,” “Error Handling,” “Linking to COMS,” and “Designators for COMS Entities... (COMS) Features Functional Descriptions The COMS service functions can be called by COMS... a designator. GET_DESIGNATOR_USING_NAME Converts a COMS entity name to a COMS designator. GET_INTEGER_ARRAY_USING_DESIGNATOR Gets a vector... by a designator. GET_NAME_USING_DESIGNATOR Converts a COMS designator to a COMS name for that designator... Using Communications Management System (COMS) Features Declaring COMS Service Functions To declare... where the result from COMS is returned. COMS provides a timestamp in the... COMS. Additional information relating to COMS designators is included under “Designators for COMS... a procedure to convert a COMS entity name to a COMS designator. LIBRARY SERVICE_LIB (LIBACCESS... declares a procedure to convert a COMS designator to a COMS name. LIBRARY SERVICE_LIB (LIBACCESS... System (COMS) Features Designators for COMS Entities Each entity in the COMS configuration... Using Communications Management System (COMS) Features Table 3–5. COMS Entities Entity Type PROCESSING_ITEM... Using Communications Management System (COMS) Features Table 3–5. COMS Entities Entity Type Value... Using Communications Management System (COMS) Features COMS Sample Program The following sample... COMS SDF Plus can be used with COMS to take advantage of COMS direct windows. Using SDF Plus with COMS... using SDF Plus and COMS together. Using COMS Input/Output Headers SDF... Management System (COMS) Features.” The COMS outputheadername construct identifies the COMS Output Header... EXCLUSIVE option. The COMS inputheadername construct identifies the COMS Input Header. Additional..., 5-20 , 7-47 , 7-47 COMS, (See Communications Management System) COMS, (See Communications Management... entry point, 5-22 , 3-7 , 3-8 as COMS extension, 3-8 , 3-8 , 3-8 as COMS extension, 3-8 I , 7-47 , 4-16 input...



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... Communication, Ocean and Meteorological Satellite COMS LRIT Mission Specific Implementation The... for development work of COMS LRIT receiving station. COMS LRIT Mission Specific... 4 PRESENTATION LAYER ........................................................................................................................ 15 4.1 Segmentation of COMS LRIT Image Data ........................................................................................... 15 4.2 File Structure ......................................................................................................................................... 15 4.3 COMS LRIT File Type ......................................................................................................................... 16 4.4 COMS LRIT Header Type... M_PDU ................................................................................................................................................. 29 VCDU ................................................................................................................................................... 29 3 KMA COMS LRIT Mission Specific Implementation Issue... ................................................................................................................................................... 30 PHYSICAL LAYER................................................................................................................................... 31 APPENDIX A: COMS LRIT DATA STRUCTURE............................................................................................. 32 APPENDIX... C (informative): CHANGE HISTORY ............................................................................................. 34 4 KMA COMS LRIT Mission Specific Implementation Issue... 15 Figure 16 Definition of COMS LRIT Data Type...................................................................................11 The... Line) Image .......................................... 14 Segmentation of COMS LRIT Image (FD).......................................................................... 15 File Structure of COMS LRIT ............................................................................................. 16 Session Layer Processing... Session Layer Output (S_PDU) ........................................................................................... 24 COMS LRIT DES Encryption ............................................................................................. 25 Transport... Structure ................................................................................................................ 30 CADU Structure................................................................................................................... 30 COMS LRIT Data Process of Each Layer ........................................................................... 32 5 KMA COMS LRIT Mission Specific Implementation Issue... 1 OSI Layer Functionalities for the COMS LRIT Service ........................................................ 10 Table 2 Image... in COMS LRIT Image Data ................................................................................. 12 Table 3 Segment Information of COMS LRIT Images ....................................................................... 15 Table 4 COMS LRIT File Type ........................................................................................................... 16 Table 5 COMS... APID of COMS LRIT .......................................................................................................... 27 Table 18 VCID of COMS LRIT .......................................................................................................... 28... LRIT Ancillary Data .............................................................................................................. 33 6 KMA COMS LRIT Mission Specific Implementation Issue... Communication, Ocean and Meteorological Satellite (COMS). It defines the formatting from... Specification’ Rev 2.6.August 1999 KARI: ‘COMS Data Acquisition and Transmission Subsystem... for COMS, C1-FX-0607-0294 COMS GS-IPT-004 Rev. 2.0 KARI ‘COMS... 131.0-B-1, September 2003 [RD 5] KMA: ‘COMS-1: Requirements for Proposal in Meteorological... Unit World Meteorological Organization 9 KMA COMS LRIT Mission Specific Implementation Issue... REFERENCE MODEL 2.1 Communication Concept The COMS LRIT dissemination service is based.... 3.1.2 Additional Data Additional data of COMS LRIT includes alphanumeric text, meteorological... 6 File Structure of COMS LRIT 4.3 COMS LRIT File Type COMS LRIT file types... inserted to header #0 of COMS LRIT. Table 4 COMS LRIT File Type File... keys supporting COMS encryption scheme (not used in the COMS LRIT mission... mission specific use) 4.4 COMS LRIT Header Type COMS LRIT header types are... Not used for COMS LRIT services. 21 KMA COMS LRIT Mission Specific... Data Figure 9 COMS LRIT DES Encryption 25 KMA COMS LRIT Mission Specific...



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... Communication, Ocean and Meteorological Satellite COMS HRIT Mission Specific Implementation The... the development work of COMS HRIT receiving station. COMS HRIT Mission Specific... 4.1 Segmentation of COMS HRIT Image Files .......................................................................................... 15 4.2 Structure of COMS HRIT File .............................................................................................................. 15 4.3 File Type of COMS HRIT File ............................................................................................................. 16 4.4 Header Records of COMS HRIT File... ...................................................................................................................................... 26 JPEG Compression ............................................................................................................................... 26 3 KMA COMS HRIT Mission Specific Implementation Issue... .............................................................................................................................................. 32 9 PHYSICAL LAYER................................................................................................................................... 34 APPENDIX A: COMS HRIT DATA STRUCTURE EACH LAYER... B (informative): CHANGE HISTORY ............................................................................................. 36 4 KMA COMS HRIT Mission Specific Implementation Issue... of Figures Figure 1 Definition of COMS HRIT Data Type ......................................................................................................11 Figure... of COMS HRIT Image (FD).............................................................................................. 15 Figure 6 File Structure of COMS HRIT... Layer Output (S_PDU)................................................................................................................ 26 Figure 9 COMS HRIT DES Encryption ................................................................................................................. 27 Figure... 16 COMS HRIT Data Process of Each Layer ............................................................................................... 35 5 KMA COMS HRIT... 1 OSI Layer Functionalities for the COMS HRIT Service ........................................................................... 10 Table 2 Data... COMS HRIT ........................................................................................................................ 14 Table 3 Segment Information of COMS HRIT Images .......................................................................................... 15 Table 4 COMS HRIT File Type .............................................................................................................................. 16 Table 5 COMS... APID of COMS HRIT ............................................................................................................................... 29 Table 21 VCID of COMS HRIT ............................................................................................................................... 30... HRIT Communication Link ................................................................................................ 34 6 KMA COMS HRIT Mission Specific Implementation Issue... incorporated in the document. 7 KMA COMS HRIT Mission Specific Implementation Issue... Communication, Ocean, and Meteorological Satellite (COMS). It defines the formatting from... Specification’ Rev 2.6.August 1999 KARI: ‘COMS Data Acquisition and Transmission Subsystem... for COMS, C1-FX-0607-0294 COMS GS-IPT-004 Rev. 2.0 KARI: ‘COMS... recommendation 131.0-B-1, September 2003 KMA: ‘COMS-1: Requirements for Proposal in Meteorological...’ Publication number 386, 1992 8 KMA COMS HRIT Mission Specific Implementation Issue... Unit World Meteorological Organization 9 KMA COMS HRIT Mission Specific Implementation Issue... REFERENCE MODEL 2.1 Communication Concept The COMS HRIT dissemination service is based... 1 Definition of COMS HRIT Data Type 11 KMA COMS HRIT Mission Specific... 4.2 Structure of COMS HRIT File Figure 6 shows the COMS HRIT file structure... Structure of COMS HRIT 4.3 File Type of COMS HRIT File COMS HRIT file... for the future COMS HRIT service expansion. Table 4 COMS HRIT File Type... and newsletter Encrypted keys supporting COMS encryption scheme Encryption key message... use) 4.4 Header Records of COMS HRIT File COMS HRIT header types are... are defined in COMS HRIT missions. 16 KMA COMS HRIT Mission Specific... Image_Compensation_Info ::= character [ ], txt 22 KMA COMS HRIT Mission Specific Implementation Issue...: JPEG lossy compression: 0 1 2 26 KMA COMS HRIT Mission Specific Implementation Issue... Decryption Figure 9 COMS HRIT DES Encryption 27 KMA COMS HRIT Mission Specific...



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... Communication, Ocean, and Meteorological Satellite (COMS) – was successfully launched on 27... geostationary observation satellite of Korea, COMS (Communication, Ocean, and Meteorological Satellite), is such an addition. COMS, successfully launched on 27 June...: In-orbit test results of COMS/MI Figure 1. Comparison of the spectral response function (SRF) of COMS/MI with other legacy instruments..., respectively. A more detailed description of COMS/MI is found in Appendix A1. The COMS program has a few differences that..., the planned mission lifetime of COMS is longer than that of... of the radiometric performance of COMS/MI in Sect. 3. Section 4 summarizes... the IOT, started soon after COMS’ arrival at the service orbit... test results of COMS/MI 2473 Table 1. Specifications of COMS/MI user..., from the radiance measurement by COMS/MI, through onboard signal processing... as the outgassing period ends, COMS/MI radiant cooler is deployed... the opening of cooler cover, COMS/MI radiant cooler cools down... the radiometric performance demonstrates that COMS/MI satisfies the end-user... introduce the performance results of COMS/MI in terms of noise...: In-orbit test results of COMS/MI 1 (a) (b) (c) (d) 3 4 5 6 7 8 Figure 4. Variation of average... deviation. 3.1 2 3 4 5 6 Figure 3. The infrared of COMS/MI takenof August 11, 2010... 3. first The firstimages infrared images COMS/MI Auare for IR1, IR2... the applied value for the COMS visible channels is estimated to...: In-orbit test results of COMS/MI 2475 Figure 5. Time series... 3 h interval of measurement schedule for COMS/MI). of the IOT, all... detectors. These performance results of COMS/MI are well within the... the imaging instrument such as COMS/MI, is also dependent on...) values. The PRNU values for COMS/MI visible channels are obtained... introduce several activities conducted for COMS/MI to improve the overall... scan mirror was applied for COMS/MI, and the performance is... Table 4. The noise performance of COMS/MI for each detector with...: In-orbit test results of COMS/MI Figure 7. Monthly mean NEdT... Table 5, the noise performance of COMS/MI is comparable to or... to the COMS configuration. However, the noise performances of COMS/MI are...). However, in the case of COMS/MI, the operational patch temperature... are within the user requirement; COMS/MI was commissioned on 1 April...: In-orbit test results of COMS/MI 2479 Figure 8. Diurnal variation... in 3 h intervals. Table 5. Comparison of COMS/MI noise performance with the... detector number 1 and number 2. Band COMS G-15 G-14 G-13 G-12 G-11... Earth observation satellite of Korea, COMS, was launched on 27 June... use of the meteorological imager, COMS/MI, started with the acquisition... outgassing period, functional tests of COMS/MI such as the command... IOT, it was concluded that COMS and its payloads were ready...: In-orbit test results of COMS/MI recommended to process with... for the further utilization of COMS/MI data. New and innovative..., it is highly possible that COMS/MI will experience unexpected changes... status of the performance of COMS/MI. Inter-satellite comparison with... of COMS/MI 2 2481 3 Appendix A: COMS/MI and IOT results A1 COMS/MI... satellite of Korea, known as COMS (Communication, Ocean, and Meteorological Satellite... km. From that point on, COMS was lifted into the geostationary...). The designed mission lifetime of COMS is 7 years, which is longer... activities were conducted at the COMS CDA (Command and Data Acquisition... the backup station for the COMS CDA and primary station for.... To meet the user requirement, COMS/MI was designed with three... channels through the albedo monitor COMS/MI Figure A1.onboard Sequential... through the albedo monitor onboard COMS/MI. 7 8 9 10 11 12 13... target (a blackbody) and albedo monitor. COMS/MI uses a Cassegrain-type telescope... cooler. For the radiometric calibration, COMS/MI has two components: a blackbody... channel, the center wavelength of COMS/MI is slightly shorter than... functional performance During the IOT, COMS/MI underwent a series of tests.... To meet the purposes of COMS/MI IOT test, activities includes...: In-orbit test results of COMS/MI 3 4 (a) (b) (c) 2483 (d) (e) 5 Figure A3. Effect... on the optical cavity of COMS/MI for different channels: (a) visible... (d) intrusion optical 2010. cavity of COMS/MI for different channels 7 (a) visible... performances at system level. For COMS/MI, there are several important... check and monitoring of COMS/MI. Because COMS/MI does not have... 26 min and 48 s, satof COMS/MI (Astrium EADS, 2011b). isfying... could be used this improvement, COMS/MI could provide a continuous as...: In-orbit test results of COMS/MI observation capability throughout the...: In-orbit test results of COMS/MI Acknowledgements. The authors are... by: F. Prata References Astrium EADS: COMS Meteo-Imager In-Orbit Test..., including Image Quality Verification Report, COMS.RP.00345.DP.T.ASTR, 169 pp., 2011a. Astrium EADS: COMS INR In-Orbit Test Report, including Image Quality Verification Report, COMS.RP.00347.DP.T.ASTR, 52... EADS: Meteo-Imager Radiometric Model, COMS.TN.00116.DP.T.ASTR, 133...



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... Communication, Ocean, and Meteorological Satellite (COMS), was developed by improving the...–45 min in advance using COMS MI data. Keywords: convective initiation...); communication; ocean and meteorological satellite (COMS); meteorological imager (MI); machine learning...]. Communication, Ocean, and Meteorological Satellite (COMS), the first Korean geostationary satellite... vapor, and thermal infrared channels. COMS MI scans a local area including... image of Earth every 3 h. Therefore, COMS MI can be used for.... However, operational CI algorithms for COMS have not been developed yet... of the spectral bands of COMS MI is similar to that... to develop CI algorithms for COMS based on the MTSAT-2 CI... fields of MTSAT-2 RDCA to COMS MI, new criteria should be... approach to CI detection from COMS MI satellite data, (2) evaluate three... lead time for CI detection. COMS MI and lightning observation data... developing CI detection models from COMS MI based on machine learning... Sens. 2015, 7 9187 2. Data 2.1. COMS MI COMS MI is the first Korean... parameters with high temporal resolution. COMS MI is composed of five... 4 km resolution. Temporal resolution of COMS MI is 15 min at... case of extreme weather conditions, COMS MI can collect data at... visible and infrared channels of COMS MI from 2011 to 2014... images of COMS MI. Table 1. Spectral channel characteristics of COMS MI. Channel... detection performance and efficiency using COMS MI data. Binary classification was applied to detect CI from COMS MI data, in which the... of the binary classification of COMS MI images for CI detection.... 3.1. Convective Initiation Interest Fields for COMS MI The interest fields used... develop a CI detection model for COMS due to the large similarity of spectral channels between the COMS MI and MTSAT-2 Imager. The... to efficiently process data, the COMS MI images were downscaled to... study can be applied to COMS MI images with such conditions... clouds [3,24,38]. However, since COMS MI provides atmospheric motion vectors... and non-CI areas from COMS MI data. Three machine learning... detection results derived from the COMS MI images obtained 15–30... atmospheric motion vector products of COMS MI by assuming constant velocity... the RF model, overlaid with COMS MI IR1 images obtained (a) 60... the RF model, overlaid with COMS MI IR1 images obtained (a) 60... the RF model, overlaid with COMS MI IR1 images obtained (a) 60... the RF model, overlaid with COMS MI IR1 images obtained (a) 60... for CI detection based on COMS MI images showed good performance... construct the interest fields because COMS MI has provided hourly atmospheric... of time (~15 min) from COMS MI data to forecast CI... producing atmospheric motion vectors from COMS MI data should be carefully... model (Table 8). This means that COMS MI images used in the... developed CI detection models from COMS MI images obtained from 2011... DT for CI detection from COMS MI images based on the... CI over Northeast Asia using COMS MI images. The cloud pixels... all CI objects in the COMS MI imagery. This could be... the CI detection models for COMS MI using ground-level radar...



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August 28, 2012 CALCON Technical Conference Geostationary Satellite (COMS) Inter-calibration of COMS Infrared and Visible Channels Dohyeong Kim, Won-Seok Lee*, Ho-Seung Lee, Sungduck Yoon, Hee Sang Lee National Meteorological Satellite Center Korea Meteorological Administration *ufoifo@korea.kr Polar orbital Satellite (Metop-A / IASI) KMA ■ Introduction of COMS ■ Inter-calibration of infrared channel ■ Moon calibration of visible channel Introduction of COMS ■ Communication, Ocean, and Meteorological Satellite(COMS) ■ Location : 128.2E ■ Launch date : June 27, 2010 (Kourou in French Guiana) ■ Design life time : 7 years(~2017) S-/L-/Ka-Band Comm Solar array Meteo. Imager Ocean Color Imager Bus Channel Center wavelength(㎛) Spatial Resolution(km) Visible 0.67 1 Shortwave IR (IR4) 3.7 4 Water Vapor (IR3) 6.7 4 IR1 10.8 4 IR2 12.0 4 1 COMS MI Observation Area FD ENH  FD : Full Disk  ENH : Extended Northern Hemisphere  LA : Local Area(Korean peninsula) LA 2 Inter-calibration of infrared channel GSICS(Global Space-based Inter-Calibration System) LEO (Metop-A IASI)  COMS launch date : June 27, 2010  In-orbit test : July 2010 ~ January 2011  Official service : April 2011 ~  quality check for first one year GEO (COMS MI1))  Inter-calibration period : April 2011 ~ March 2012  COMS MI data : level1B  Reference data : Metop-A IASI level1C 3 1) MI : Meteorological Imager Inter-calibration methodology(1/2) Collocation TIME |TLEO – TGEO| < 300s COMS channel Weather Condition Dtmax (minutes) ε1 ε2 Gaussian IR1 (10.8 μm) Clear 5 0.01 1.65 2 Cloudy 5 0.03 3.31 2 Clear 5 0.01 1.82 2 Cloudy 5 0.03 3.64 2 All 5 0.01 0.311 1 Clear 5 0.01 0.0151 2 Cloudy 5 0.03 0.0302 2 IR2 (12.0 μm) WV (6.8 μm) SZA : θ SWIR (3.8 μm) SZA COS(θIASI) -1 < 2011.8.1 1215UTC COMS SZA 2011.8.1 1215UTC IASI SZA SZA SZA & Uniformity ε1 COS(θcoms) Uniformity STDV(LE) < |MEAN(F)-MEAN(E)|Ⅹ9 STDV(E) Non-uniform features ε2 < Gaussian F : FOV_BOX (COMS 3 X 3 pixels) E : ENV_BOX (COMS 9 X 9 pixels) LE : COMS radiance in ENV_BOX 4 Inter-calibration methodology(2/2) Simulated COMS MI radiance from IASI observations  Constraint method Generate a super channel consisting of combination of the hyper channel to imitate a broadband channel. SRFs of COMS (red), METEOSAT-8 (green) and GOES-12 (blue) IR channeㄴls Proposed by Tahara (JMA) GEO: COMS SRFs of COMS MI IR2(red), IASI (green: valid) channels SRFs of IASI (green: valid) and gap channels(orange) Valid channel SRFs of IASI super channel simulating SRF of COMS MI IR2 Gap LEO: IASI Wavenumber (cm-1) SRFs of COMS MI IR4(red), IASI (green:valid) and gap channels(orange) Weights Weights of IASI super channel simulating COMS MI IR2 IR4:SWIR Wavenumber (cm-1) Wavenumber (cm-1) Ii : Radiances of IASI wi : Weights for IASI Iv : Radiance of the super channel i : Channel index numbers of IASI 2820 2942 5 COMS MI TB vs. Metop-A IASI TB 6 ΔTB(COMS MI - Metop-A IASI) 7 ΔTB(COMS MI - Metop-A IASI) Time Series  Positive bias : IR1, IR3  Small, stable biases < 0.5K  Negative bias : IR2, IR4  Slope of monthly variation < 0.01 8 KMA/NMSC web http://nmsc.kma.go.kr/jsp/homepage/ eng/contents/main/main.jsp  Time sequence (TB difference)  Regression coefficients between COMS radiance and IASI radiance  Scatter plot (COMS rad. vs. IASI rad. and IASI TB – COMS TB) 9 Moon Calibration of COMS visible (1/3) • COMS has observed moon monthly for visible channel monitoring moon calibration since Feb. 2011. • For observing moon, KMA choose two kind of moon observation method by using Local Area observation mode for moon(direct) and Full disk observation with moon(indirect). • To process these observed data, KMA has used its own Moon Processing system in Image Processing Subsystem(IMPS) for Moon Calibration. 10 Moon Calibration of COMS visible (2/3) • To measure the total degradation of the instrument visible channel • Comparison between the Moon signal and ROLO model(moon irradiance computation model) of USGS – as a Function of Phase angle(Sun-Moon-Earth) • Imager Response Where P I instrument I ref I instrument is the Moon irradiance as measured by the Imager I ref is the Moon irradiance computed from the ROLO model, under the same conditions(phase angle, positions of sun, moon, satellite, etc.) 11 Moon Calibration of COMS visible (3/3) •Trend shows that there is about 3.4% COMS visible channel degradation from Feb 2011 to May 2012. Trend (1-k)×100(%) (1-k)×100(%) Change of Ratio k TIME(month) TIME(month) • For obtaining more precise result, We need more data through the long term observation. 12 Summary • Infrared channel - COMS MI IR channels have low-bias within 0.5K accuracy - IR1, IR3 of difference between COMS TB and IASI TB showed positive bias while IR2, IR4 showed negative bias. - Although there is a slight bias, infrared channels are stable and working well. • Visible channel - There is about 3.4% visible channel degradation from Feb 2011 to May 2012



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... Communication, Ocean, and Meteorological Satellite (COMS) mission requires accurate satellite positioning... ground station is used for COMS OD in normal operation. However, the orbital longitude of the COMS is so close to that... Communication, Ocean, and Meteorological Satellite (COMS), which will be placed on... be launched in 2009. The COMS, based on the latest version..., and ocean observation. However, the COMS is the first satellite to... control system (SGCS) of the COMS and Ka-band communication service... (SK), and event prediction [1]. The COMS operational orbit determination (OD) is..., since the accuracy of the COMS ODP sensitively affects the processing... data, the requirements of the COMS ODP should be met for..., the orbital longitude of the COMS is located at 128.2° east... include dynamic model error. The COMS consists of a box and a one... control is operated in the COMS to compensate the torque caused... the rotational momentum of the COMS, the rotational speed of the... be periodically fired. Thus, the COMS fires a thruster twice every day... off-loading (WOL) maneuver. The COMS performs WOL and SK maneuvers... the mission requirement for the COMS ODP. In multi-station error... should be Fig. 1. Configuration of COMS (image courtesy of KARI). ETRI... 30, Number 6, December 2008 Table 1. COMS orbital elements (Epoch: UTC 00... to be used in the COMS operational system and examples of... of Jan. 1-4, 2006 for the COMS at 128.2° east longitude and... 0.0122 m2/kg for the COMS data generation. We defined the... 2) [8]. To maintain the location of COMS within a ± 0.05° Yoola Hwang et... range. We component for the COMS based on the Eurostar 3000... primary OD requirement for the COMS mission is that Table 4 were... station. orbit accuracy required for COMS [3], [9]. Gaussian white Here, the error... The predicted covariance of the COMS system using measurement data from... previously defined values for the COMS mission (Tables 2 and 3). When OD... operational OD system for the COMS mission has been studied to... the azimuth angle in the COMS. When the bias of the... Wheel Off-Loading Strategy of COMS,” The 24th AIAA Int’l Communications... been involved in developing the COMS ground control system. She is... for the KOMPSAT-3, KOMPSAT-5, and COMS-1 Ground Mission Control projects as... has been involved in the COMS-1 Ground Mission Control project. Her... is now working for the COMS-1, KOMPSAT-3, and KOMPSAT-5 Ground Mission...