From FORMOSAT-3/COSMIC to FORMOSAT-7/COSMIC-2 Mission

Transcription

1 From FORMOSAT-3/COSMIC to FORMOSAT-7/COSMIC-2 Mission Vicky Chu, Joe Fong, M-S Chang, N-C Liu, Tie Liu, Linton Chen, Abert Shiau, W-J Chen, and *Wei Xia-Serafino Nationa Space Organization and *Nationa Oceanic and Atmospheric Administration th COSMIC Data Users Workshop/IROWG-6

2 FORMOSAT-3/COSMIC The FORMOSAT-3 is the 3rd major space program at NSPO. It is known as Consteation Observing System for Meteoroogy, Ionosphere, and Cimate, COSMIC, in the United States. An AIT-TECRO Agreement was impemented in May, 1999 to move forward with the COSMIC/FORMOSAT-3 Joint Program. UCAR is assigned to represent the U.S. and NSPO is authorized to represent Taiwan to jointy execute this mission. The 6 micro-sateites were successfuy aunched in Apri, This is the first time that six consteationa weather sateites were successfuy aunched in custer formation. The FORMOSAT-3/COSMIC Radio Occutation Consteation has been proven to have significant societa impacts and is appraised as the Most Accurate and Stabe Thermometer in Space.

3 Taiwan Science Team Review FS3/C1 in 2008 High accuracy, precision and vertica resoution demonstrated. Significant positive impact on ski scores of operationa NWP. Weather Centers started to incorporate FS3/C1 data into system. ü ECMWF: 8 months after aunch ü NCEP and UK Met Office: 13 months after aunch ü Meteo France: 17 months after aunch ü Centra Weather Bureau: 39 months after aunch Discovery of new ionospheric features (e.g. Pasma caves, Nighttime midatitude summer anomay, Pasma depetion bay, Ionospheric earthquake precursor) Providing 1500 soundings per day for weather forecasting system Ionospheric pasma cave/tunne

4 Review of FORMOSAT-3 Sateite Anomay FORMOSAT-3 Anomay Computer resets Bus GPS receiver anomay Attitude excursion Propusion parameter adjustment Soar array anomay Lost of communication Payoad GOX bad signa noise ratio Payoad GOX reboot oop FORMOSAT-7 Enhancement Enhancement on the tota ionizing dose and singe event upsets requirements Data from TGRS as a backup Enhancement on the attitude requirement On-site support from contractor Redundancy To take advantage of phoenix mode JPL JPL Payoads TBB/GOX interference ---

5 FORMOSAT-3/COSMIC Lessons Learned Review Participating parities incude NOAA, MOST(NSC), NSPO, UCAR, JPL, BRE, NRL, and Taiwan science team. Hed at UCAR in Areas Lessons Learned Mission S-band frequency seection: to minimize the radio interference with other sateite program. RFI among payoad: passive payoad is preferred. Secondary payoad determination: The secondary payoad shoud meet the eve 1 requirement and be endorsed by system engineer on interfaces. Program Procurement practice on Taiwan side Patent right for consteation depoyment Data Processing Center Mission Payoad To eaborate the description on the firmware change (for mission operations, for users appication) More thorough test procedures, onger test time, more budget aocation.

6 FORMOSAT-7/COSMIC-2 Joint Program Joint Program Program Management System Engineering Mission Assurance Sateite Deveopment Launch Service Ground & Mission Operations Data Processing WBS 8.0 Data Utiization Advisory & Supervision System Anaysis NSPO Mission Assurance SL for Launch #1 Launch #1 Ground System US DPC US RO Data Utiization Joint Program Management System & Interface NOAA Mission Assurance SL for Launch #2 Launch #2 Mission Operations Taiwan DPC Taiwan RO Data Utiization NSPO Program Management System Verification NSPO-Buit SL DPC IF US Science Data Appication NOAA Program Management Bus Mission PL Science PL SL AIT Taiwan Science Data Appication SL: Sateite PL: Payoad AIT: Assemby, Integration, and Test DPC: Data Processing Center IF: Interface RO: Radio Occutation Bus Mission PL Science PL SL AIT Responsibe by Both Side Responsibe by NSPO Responsibe by NOAA

7 FORMOSAT-7/COSMIC-2 Supervision MOST TECRO AIT-TECRO Agreement AIT DOC NARLabs F7/C2 Executive Steering Committee NSPO NOAA FORMOSAT-7 Program Management Office (NSPO) FORMOSAT-7 / COSMIC-2 Joint Program Management Office COSMIC-2 Program Management Office (NOAA) FORMOSAT-7 Execution Pan FORMOSAT-7 / COSMIC-2 Joint Management Contro Pan COSMIC-2 Program Management Pan @NSPO AIT-TECRO Agreement was signed in The first Executive Steering Committee meeting was hed in The Impementing Arrangement #1 defining the Launch#1 was signed in 2013.

8 FORMOSAT-3 and FORMOSAT-7 Consteation FORMOSAT-3/COSMIC GPS Radio Occutation Consteation of 6 microsateites 1500~2000 occutation per day 80% observations avaiabe within 3 hr FORMOSAT-7/COSMIC-2 GPS+GLONASS Radio Occutation Consteation of 12 sma sateites 8000 occutation per day 45-min data atency (median) for Launch#1

9 FORMOSAT-7/COSMIC-2 Key Parameters FORMOSAT-7/COSMIC-2 First Launch Second Launch Mission Objectives To be achieved after Fu Operationa Capabiity: 8,000 atmospheric sounding profies per day 45-min data atency for neutra atmosphere and 30-min data atency for ionosphere and space weather Consteation 6 SC to ow-incination-ange orbit (mission atitude 520 km) 6+1 SC to high-incination-ange orbit (mission atitude ~800 km) GNSS RO Payoad TGRS TGRS Scientific Payoad Launch Vehice US furnished IVM and RF Beacon Instrument Facon Heavy rideshare; ESPA Grande Ring Taiwan furnished Compatibe with Facon 9, Facon Heavy, and EELV with a 5-m fairing Launch Schedue (as a goa) Communication Architecture 2018 TBR Via Ground Station

10 Mission Architecture High-inc GLONASS-FDMA GPS NSPO-Buit S/C FORMOSAT-7/ COSMIC-2 Low-inc TT&C stations (Taiwan) TT&C stations (overseas) Fiducia Network US DPC Taiwan DPC Launch Vehices Sateite Operations and Contro Center Users Researchers

11 Data Products Neutra Atmosphere Ionosphere and Space Weather Data Products Bending ange profie Refractivity profie Temperature profie Geopotentia height profie Tota Eectron Content (TEC) Eectron Density Profie (EDP) Scintiation ampitude index(s 4 ) Scintiation phase index (S f )

12 Launch#1 FORMOSAT-7 Mission Sateites Shape cuboid uniatera oad soar array Courtesy of SSTL Size 100 x 125 x 125 cm 3 Mass Communications Capabiities Payoad Support 300 kg (per sateite) S band, upoad speed 32kbps,downoad speed 2 Mbps data capacity 2Gbits, oad 39.4 kg, power suppy 95W Mission Payoad Science Payoad TGRS (TriG GNSS Radio occutation System) IVM (Ion Veocity Meter) RFB (Radio Frequency Beacon) To measure the phase and group deay of GPS and GLONASS signas. To measure eectric fied perpendicuar to the magnetic fied and ion motion parae to the magnetic fied To measure tota eectron content and ionospheric scintiation.

13 Achievement to chaenges on FORMOSAT-7 Transmitting antenna: 4 Receiving antenna: 10 FOV constraints: antennas, IVM sensors, star cameras, sun sensors, thrusters, soar array

14 Launch#1 FORMOSAT-7 Mission Sateite Status Sateite assemby, integration and test has been competed in May A 6 six sateites sit in NSPO s faciity.

15 Launch#1 Launch Vehice Interfaces Six sateites wi be paced on the Integrated Payoad Stack of Facon Heavy FORMOSAT-7/ COSMIC-2 Concept of Facon Heavy from Launch Comex-39A CCAFS

16 Launch#1 Ground Stations 9 ground stations to support 30~45-min (median) data atency.

17 Mission Operations Schedue spacecraft bus and payoad activities. Coordinate ground station pass pan. Send command and oad to the sateite through TT&C stations. Monitor and trend the state of heath of sateites. Conduct the consteation depoyment

18 Data Processing Center Data is avaiabe on a fu and open basis and assessabe to users through data processing center. Two Data Processing Centers: one in the U.S. one in Taiwan. USDPC and TDPC have passed the readiness review. FORMOSAT-7 TDPC System Architecture

19 Timeine after Launch Spacecraft Bus Checkout Heath check Norma mode configuration Commissioning ~2 weeks Payoad Instrument Checkout Mission payoad check Science payoads check Orbit phasing SC#1~5 Orbit phasing is to de-confict the ground contact time. Payoad wi be off during maneuver ~26 weeks Data Caibration/ Vaidation Mission Payoad Commissioning Science Payoad Commissioning Data anaysis Quaity check and vaidation Certification to Environmenta Data Record ~3 weeks Orbit Transfer SC #6 Orbit Transfer SC #5 Orbit transfer is to depoy the consteation. Payoad wi be off during maneuver ~3 weeks

20 Orbit Phasing 180 Argument of Latitude deg Orbit Maneuver +/- 0.5 km; +/- 1.0 km Time Argument of Latitude separated by 36 deg

21 Consteation Depoyment 850 FORMOSAT-7 Consteation Atitude Depoyment Profie Orbit Atitude (km) /10/6 2017/1/6 2017/4/6 2017/7/6 2017/10/6 2018/1/6 2018/4/6 Parking orbit atitude Fina orbit atitude Note: Sateites wi be remained at fina orbit atitude. The maintenance wi be activated as the orbit is decayed to beow 520 km. Consteation Depoyment takes advantage of J2 effect (perturbation because of a nonspherica earth) W: Right ascension of ascending node; t:time k: constant; a: semi-major axis; i: incination Consteation depoyment to fina orbits wi take ~19 months Every ~108 days, the operations team wi maneuver a spacecraft from parking orbit to mission orbit

22 Initia Operationa Capabiity (IOC) IOC Miestone Estimated Accompished at Sateite IOC Neutra atmosphere IOC Mission consteation IOC ü Compete Sateite s heath check ü Sateite in norma operations ü Initia TGRS products avaiabe for operationa use ü Sateites in depoyed consteation ü Sufficient ground stations are depoyed to meet atency requirements. ü Compete neutra atmosphere data vaidation Launch + 1 months Launch + 7 months Launch + 20 months

23 FORMOSAT-3 sateites have provided data for 11 years. This is the 10th COSMIC Data Users Workshop. FORMOSAT-7 Launch#1 is amost ready. The Internationa Conference on GPS Radio Occutation (ICGPSRO) wi be hed in September 2018 in Taiwan.