![]() ![]() Spacecraft Launch Mission Status Sensor Complement Payloads Ground Segment References PROBA-V (Project for On-Board Autonomy - Vegetation) ![]() PROBA-V began making test observations of Europe and Aftica, assisting with drought warnings in the African Sahel. In July 2020, due to an error on board, one of the three telescopes began observing the Earth at night, and so the mission objective was altered. These included the Energetic Particle Telescope (PET), a new radiation monitoring sensor, and HERMOD (High Density Space Form Connector Demonstration), testing multi-line optical fibre reliability in space. A number of demonstration modules were also included on PROBA-V. An S-band Telemetry, Tracking and Command (TT&C) mode is used in conjunction with an X-band data downlink subsystem. The satellite bus was built on the heritage of the PROBA-1 and PROBA-2 missions, with only the on-board switching (OBS) receiving minor modifications. ![]() It had an orbital period of 101 minutes and an inclination of 98.64°. PROBA-V operated in a sun-synchronous orbit with an altitude of 820 km, which decayed over time due to the lack of any on-board thrusters. PROBA-V measured across four spectral bands: blue, red, VNIR (visible near infrared), and SWIR (shortwave infrared). ![]() Each telescope had an individual spatial resolution of 300 m, yielding a 100 m resolution across the central telescope. Accounting for cloud cover, this corresponded to a full sweep of Earth’s vegetation every 10 days. Performance SpecificationsĮach TMA was a multispectral pushbroom spectrometer, observing the surface with a swath width of 2250 km, a noticeably large value for a satellite of PROBA-V’s size. Each SI contained one three-mirror anastigmat (TMA) telescope, and a beam splitter to divide up separate visible, near-infrared (VNIR) and short-wave infrared (SWIR) spectral bands.Īlongside each telescope, the optical bench also carried star tracker optical heads allowing for precise co-alignment, and a radiator to remove excess heat from the optical system. PROBA-V’s Field of View (FOV) is constructed from three Spectral Imagers (SI). The primary payload was the Vegetation Instrument, a multi-spectral radiometer, built by Belgian satellite specialists, Optronic Instruments & Products (OIP) systems. ![]()
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