FORMOSAT-8 Program is one of the priority missions from the 3rd phase of the “National Space Technology Long-Term Development Program” in Taiwan (3rd phase space program). FORMOSAT-8 Program is also declared as the first initiated remote sensing satellite program from the 3rd phase space program with the generic bus platform to serve as the common platform for all of the satellite missions in the 3rd phase space program.
FORMOSAT-8 program develops six high-resolution optical remote sensing satellites with a resolution of 1 meter. These satellites are deployed in the sun-synchronous orbit to form a constellation, and the sub-meter resolution is achieved through the Super Resolution method of ground image post-processing. The constellation deployment can provide multiple daily revisit capabilities and global coverage of satellite images (including stereoscopic images) as well as dynamic monitoring information to achieve real-time satellite resource requirements. According to the implementation strategy, the first and second satellites of FORMOSAT-8 are planned to be launched in 2023 and 2024; the third and fourth satellites will be launched in 2025 and 2026; the fifth and sixth satellites will be launched in 2027 and 2028.
June - FORMOSAT-8B is planned to be launched
June - FORMOSAT-8A is planned to be launched.
September - Satellite Delta-Critical Design Review(delta-CDR) meeting was completed.
September - Satellite Operation Control System Acceptance Review (SAR) meeting was completed.
March - Program Office was officially established on 1st March, 2019.
December - Satellite Critical Design Review (CDR) meeting was completed.
December - Engineering models and functional tests of key components were accomplished, as well as core technologies of ground systems.
March - FORMOSAT-8 Program Office was officially established on 1st March, 2019.
December - Prototypes/Elegant Bread Broads (EBB) of key components and their performance tests were accomplished, as well as core technologies of ground systems.
November - Satellite Preliminary Design Review (PDR) meeting was completed.
December - Satellite System Design Review (SDR) meetings were completed.
June - Satellite Mission Definition Review (MDR) meetings were completed.
March - “MicroSat Program”was the previous project and funded by “Taiwan New Space Industry Pilot Program” from Executive Yuan, R.O.C. The development of indigenous key components and satellite system design were kicked off.
|Mission Orbit||Altitude ~561 km, sun-synchronous|
|Mission Life||3 years (Goal: 5 years)|
|Local Time of the Descending Node(LTDN)||10:00 ~11:00 or 13:00~14:00|
|Revisit Frequency||1 day (Locally and Globally)|
|Bands||1 PAN + 4 MS|
|System Contrast Transfer Function (CTF)||≧ 0.07(PAN)|
|Signal-to-Noise Ratio (SNR)||≧ 80 (PAN)|
|RSI Duty Cycle||≧ 8%|
|Agility||Roll: 80o/60 sec, Pitch: 80o/60 sec, Yaw: 50o/60 sec|
|Image geo-accuracy||304m without GCP|
|Image data downlink rate||500 Mbps|
|Image data storage||512 Gbits|
|Field of Regard||45o|
Regarding to the increasing newly space technologies are under development, besides Remote Sensing Payload, Science Payload and Advanced Secondary Payload will be developed to demonstrate the pioneer space technologies.
Remote Sensing Payload
|Spectral Bands||One panchromatic band and at least four multi-spectral bands|
|Ground Sampling Distance (GSD)||Panchromatic band: 1m @ nadir
Multi-spectral bands: 2m @ nadir
|Swath Width||≧10 km @ nadir|
|RSI Duty Cycle||≧8% per operational orbit|
|RSI System Contrast Transfer Function (CTF)||≧0.14 @ 1m (PAN)
≧0.26 @ 2m (MS)
|RSI Spectral Range||PAN: 450~800 nm
Blue: 450‐520 nm
Green: 520‐590 nm
Red: 630‐690 nm
NIR: 770‐890 nm
|RSI Signal to Noise Ratio (SNR)||PAN: ≧80
|Image Data Storage||≧512 Gbits|
FORMOSAT-8A Science Payloads are Dual-band Imager of Atmospheric Transient (DIAT) and Electron Temperature and Density Probe(TeNeP) which will be developed by National Cheng Kung University. The study focuses on the topics of atmospheric electricity, ionospheric physics and high energy physics.
Advanced Secondary Payload
FORMOSAT-8B Science Payloads are Gamma-ray Transients Monitor (GTM) which will be developed by National Tsing Hua University.
Combining the advanced R&D capacity of research and academia communities and the manufacturing capacity of the industry in Taiwan to form a domestic industry-academia-research cooperation team, NSPO carries out R&D for satellite key components with their corresponding space-grade verifications for FORMOSAT-8 program. At the same time, commercial off-the-shelf (COTS) satellite parts are used to improve component self-manufacturing rate and reduce costs, and establish a standard interface with modular design to effectively save labor and time. Through the development of a generic satellite bus platform, the participation of domestic industry, academia and research will be expanded, and the prototype structure of the space industry supply chain in Taiwan will be built to achieve the goal of indigenous key components, thereby laying the foundation for the Taiwan space industry.
The research and development of key components are divided into four categories: "optical payload components", "flight control components", "electric components", and "mechanical components". Development items of "optical payload components" include optical primary / secondary mirrors, optical filters, corrective lenses, FPA area sensors, EU electronic units, optical focusing mechanisms, ultra-low moisture absorption carbon fiber composite materials, etc. Development items of "flight control components" include GPS receivers, MEMS inertial reference units, star trackers, reaction wheels, etc. Development items of "electric components" include on-board computers, power control units, X-band transmitters, X-band antennas, solar cells, solar panels, etc. Development items of "mechanical components" include H2O2 propulsion modules (with thruster modules, propellant filters, propellant tanks, ball latching valves, pressure transducers), solar panel deployment mechanisms, dampers, thermoelectric coolers, phase-change thermal control modules, etc.
In addition to NSPO, the FORMOSAT-8 program is jointly completed by domestic industry, academic, and research related units.