From FORMOSAT-3/COSMIC to FORMOSAT-7/COSMIC-2 Mission Vicky Chu, - - PowerPoint PPT Presentation
From FORMOSAT-3/COSMIC to FORMOSAT-7/COSMIC-2 Mission Vicky Chu, Joe Fong, M-S Chang, N-C Liu, Tie Liu, Linton Chen, Albert Shiau, W-J Chen, and *Wei Xia-Serafino National Space Organization and *National Oceanic and Atmospheric Administration
10th COSMIC Data Users’ Workshop/IROWG-6
2017.9.21
l The FORMOSAT-3 is the 3rd major space
l An AIT-TECRO Agreement was implemented in
l The 6 micro-satellites were successfully
l The FORMOSAT-3/COSMIC Radio Occultation
Providing 1500 soundings per day for weather forecasting system Ionospheric plasma cave/tunnel
l High accuracy, precision and vertical
l Significant positive impact on skill
ü ECMWF: 8 months after launch
l Discovery of new ionospheric features
FORMOSAT-3 Anomaly FORMOSAT-7 Enhancement Computer resets Enhancement on the total ionizing dose and single event upsets requirements Bus GPS receiver anomaly Data from TGRS as a backup Attitude excursion Enhancement on the attitude requirement Propulsion parameter adjustment On-site support from contractor Solar array anomaly Redundancy Lost of communication To take advantage of phoenix mode Payload GOX bad signal noise ratio JPL Payload GOX reboot loop JPL Payloads TBB/GOX interference
Areas Lessons Learned Mission
interference with other satellite program.
should meet the level 1 requirement and be endorsed by system engineer on interfaces. Program
Data Processing Center To elaborate the description on the firmware change (for mission
Mission Payload More thorough test procedures, longer test time, more budget allocation.
Joint Program
Program Management Mission Assurance Satellite Development Launch Service Ground & Mission Operations Data Processing SL for Launch #1 SL for Launch #2 NSPO-Built SL NSPO Mission Assurance NOAA Mission Assurance Launch #1 Ground System US DPC Taiwan DPC DPC IF Advisory & Supervision Joint Program Management NSPO Program Management Launch #2 WBS 8.0 Data Utilization Bus Mission PL Science PL US RO Data Utilization Taiwan RO Data Utilization US Science Data Application Taiwan Science Data Application NOAA Program Management SL AIT Bus Mission PL Science PL SL AIT Responsible by Both Side Responsible by NOAA Responsible by NSPO SL: Satellite PL: Payload AIT: Assembly, Integration, and Test DPC: Data Processing Center IF: Interface RO: Radio Occultation System Engineering System Analysis System & Interface System Verification Mission Operations
F7/C2 Executive Steering Committee
TECRO AIT
AIT-TECRO Agreement FORMOSAT-7 / COSMIC-2 Joint Program Management Office
NOAA NSPO NARLabs
FORMOSAT-7 Program Management Office (NSPO) COSMIC-2 Program Management Office (NOAA)
MOST
FORMOSAT-7 / COSMIC-2 Joint Management Control Plan
20160302@NSPO
COSMIC-2 Program Management Plan FORMOSAT-7 Execution Plan
DOC
l
AIT-TECRO Agreement was signed in 2010.
l
The first Executive Steering Committee meeting was held in 2011.
l
The Implementing Arrangement #1 defining the Launch#1 was signed in 2013.
FORMOSAT-7/COSMIC-2 GPS+GLONASS Radio Occultation Constellation of 12 small satellites 8000 occultation per day 45-min data latency (median) for Launch#1 FORMOSAT-3/COSMIC GPS Radio Occultation Constellation of 6 microsatellites 1500~2000 occultation per day 80% observations available within 3 hr
FORMOSAT-7/COSMIC-2 First Launch Second Launch Mission Objectives To be achieved after Full Operational Capability:
¿ 8,000 atmospheric sounding profiles per day ¿ 45-min data latency for neutral atmosphere and 30-min data latency
for ionosphere and space weather Constellation 6 SC to low-inclination-angle
¿ 6+1 SC to high-inclination-angle
GNSS RO Payload TGRS TGRS Scientific Payload US furnished IVM and RF Beacon Instrument Taiwan furnished Launch Vehicle Falcon Heavy rideshare; ESPA Grande Ring Compatible with Falcon 9, Falcon Heavy, and EELV with a 5-m fairing Launch Schedule (as a goal) 2018 TBR Communication Architecture Via Ground Station
GLONASS-FDMA
Fiducial Network US DPC TT&C stations (overseas) TT&C stations (Taiwan) Satellite Operations and Control Center Users Researchers
FORMOSAT-7/ COSMIC-2 High-inc Low-inc
Taiwan DPC
GPS
Users Researchers Launch Vehicles NSPO-Built S/C
Shape cuboid unilateral load solar array Size 100 x 125 x 125 cm3 Mass 300 kg (per satellite) Communications Capabilities S band, upload speed 32kbps ,download speed 2 Mbps Payload Support data capacity 2Gbits, load 39.4 kg, power supply 95W
Courtesy of SSTL
Transmitting antenna: 4 Receiving antenna: 10 FOV constraints: antennas, IVM sensors, star cameras, sun sensors, thrusters, solar array
l Satellite assembly, integration and test has been completed in May
Concept of Falcon Heavy from Launch Comlex-39A CCAFS
FORMOSAT-7/ COSMIC-2
l 9 ground stations to support 30~45-min (median) data latency.
TDPC System Architecture
FORMOSAT-7
Spacecraft Bus Checkout
configuration
Payload Instrument Checkout
payload check
payloads check
Data Calibration/ Validation Orbit Transfer SC #6 ~26 weeks
Orbit phasing SC#1~5
~3 weeks Orbit Transfer SC #5 ~3 weeks
to de-conflict the ground contact time.
maneuver
~2 weeks
20 40 60 80 100 120 140 160 180 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Argument of Latitude Time
Orbit Maneuver +/- 0.5 km; +/- 1.0 km Argument of Latitude separated by 36 deg
36 deg
450 550 650 750 850 2016/10/6 2017/1/6 2017/4/6 2017/7/6 2017/10/6 2018/1/6 2018/4/6
Orbit Altitude (km) FORMOSAT-7 Constellation Altitude Deployment Profile
Parking orbit altitude Final orbit altitude
l Constellation Deployment takes advantage of J2 effect (perturbation
l l Constellation deployment to final orbits will take ~19 months l Every ~108 days, the operations team will maneuver a spacecraft from
W: Right ascension of ascending node; t:time k: constant; a: semi-major axis; i: inclination
Note: Satellites will be remained at final orbit altitude. The maintenance will be activated as the orbit is decayed to below 520 km.