TRITON (Wind-Hunter Satellite) is a satellite of about 250kg, designed and manufactured by TASA. TRITON carries the Global Navigation Satellite System-Reflectometry (GNSS-R), independently developed by TASA, to collect the GNSS signal reflected by the earth surface. Its mission is to conduct researches on air-sea interaction, and typhoon intensity prediction. Taiwan is greatly affected by typhoons every year, the information of sea wave height and sea surface wind speed, retrieved from the reflected signal, are useful for the research on typhoon intensity and path prediction.
To support TRITON mission, the GNSS-R data processing module is a combined efforts of TASA, Central Weather Bureau (CWB), and domestic academic teams, which will be performed by the Taiwan RO Processing System (TROPS) to provide users the sea surface wind data. In addition, TASA cooperates with the academic and research community to study the application of sea surface reflection signal data in meteorological numerical models, which is helpful for forecasting severe weather and reducing uncertainty in disaster warning.
The TRITON satellite will be launched on an Arianespace Vega C rideshare mission. The orbit is a circular low earth orbit within the altitude around 550~650km and the inclination angle of about 98 degree.
November - Pre-Shipment Review (TBD)
September - Separation and Shock Tests (TBD)
August - Complete Acoustic and Vibration Tests
June - Complete Solar Array AIT
May - Complete End to End test between satellite and Satellite Operations Control Center
April - Complete Operation Readiness Review
December - Complete Operation Center to Satellite interface verification
September - Complete the satellite Electromagnetic Compatibility test
August - Complete the satellite and payload antenna measurement
November - The 3rd annual GNSS-R airborne test (air-naval test)
September - The 2nd annual GNSS-R airborne test (air-naval test)
July - The 1st annual GNSS-R airborne test
July - Complete Mission Test #1
March - Launch Service Contract effective
January - Launch & In-Orbit Insurance Contract effective
December - Sign the Launch & In-Orbit Insurance Contract
November - Sign the Launch Service Contract
April - GNSS-R Flight Model acceptance test
January - preliminary Comprehensive Performance Test, CPT
December - Integration and Test Review meeting, ITR
November - Critical Design Review meeting, CDR
June - Preliminary Design Review meeting, PDR
May - System Design Review meeting, SDR
Similar to FORMOSAT-7, the TRITON satellite bus is a cube with a deployable solar panel at single side. Several critical components, flight software and payload instrument developed by TASA will be integrated for in orbit validation.
The fundamental information of TRITON is:
|BUS||cube shape, single deployable solar panel|
|DIMENSION||100 x 120 x 125 cm3|
|COMMUNICATION||S-band, 32kbps uplink, 2Mbps downlink|
The core technology of GNSS-R is based on an indigenous space grade GPS receiver. One direct signal and eight reflected GNSS signals can be received and processed simultaneously in GNSS-R. In addition, the GNSS source is programmable.
Except GNSS-R instrument, the system includes a high gain antenna, a low noise amplifier and a multi-channel RF front end. All component developments and verifications are completed, and are integrated onto satellite.
Besides hardware development, TASA also working along with academic team to promote GNSS-R researches and applications in order to benefit weather forecast and disaster prevention.