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| PRISMA (satellite) | |
|---|---|
| Name | PRISMA |
| Operator | Italian Space Agency |
| Manufacturer | OHB Italia |
| Mission type | Technology demonstration |
| Launch date | 2019-03-22 |
| Launch vehicle | Vega |
| Launch site | Guiana Space Centre |
| Orbit | Low Earth orbit |
PRISMA (satellite) is an Italian hyperspectral imaging and electro-optical satellite developed to demonstrate novel spacecraft technologies, hyperspectral sensors, and formation-flying capabilities for civil and commercial remote sensing. The mission builds on heritage from European space programmes and industrial partners to provide high-spectral-resolution data for applications in agriculture, forestry, oceanography, and environmental monitoring. PRISMA was designed, developed, and operated by a consortium including the Italian Space Agency, OHB Italia, and academic institutions, with activities integrated into the international Earth observation community.
PRISMA traces technical lineage to programmes such as European Space Agency missions including Envisat, Sentinel-2, Copernicus Programme, PROBA, and industrial efforts by Thales Alenia Space, Airbus Defence and Space, Leonardo S.p.A., OHB SE, SSTL, Space Systems/Loral, Ball Aerospace and research groups from Politecnico di Milano, Istituto Nazionale di Astrofisica, Università degli Studi di Milano, CNR and INAF. The satellite combined hyperspectral instrumentation similar in concept to sensors on NASA platforms such as EO-1 and HyspIRI concepts, and drew expertise from programmes like Landsat and Terra for calibration and validation. Funding and management engaged entities from Italian Space Agency collaborations with European institutions, echoing governance models seen in European Commission projects and bilateral collaborations with agencies like CNES, DLR, JAXA, NASA Jet Propulsion Laboratory, and NOAA.
PRISMA aimed to validate technologies for hyperspectral imaging, panchromatic imagery, on-board data processing, and formation flying to support future missions such as Copernicus expansions, technology demonstrators from ESA Technology Centre, and national programmes by ASI and industrial roadmaps of OHB SE and Thales Alenia Space. Primary objectives included demonstrating high-spectral-resolution mapping for applications in Food and Agriculture Organization-relevant monitoring, coastal zone management tied to UN Environment Programme priorities, and land cover analysis aligned with Convention on Biological Diversity and United Nations Framework Convention on Climate Change monitoring needs. Secondary goals included assessment of on-board data compression methods used by companies like Harris Corporation and SpaceX project teams, and interoperability with ground segments operated by institutions such as e-GEOS and centres like ESRIN.
The spacecraft bus incorporated structural and thermal designs influenced by suppliers including OHB Italia and subsystem providers with heritage from MT Aerospace, RUAG Space, SENER, and Avio. The payload combined a hyperspectral pushbroom spectrometer and a medium-resolution panchromatic imager, sharing design philosophy with instruments on PRISMA-peer missions like Hyperion, CHRIS on PROBA-1, and prototype concepts from NASA Ames Research Center and JPL. Instrument subsystems included focal plane assemblies using detectors from vendors akin to Teledyne DALSA and Raytheon Technologies, optical benches with coatings developed alongside Schott AG and Zeiss, and onboard processors implementing algorithms influenced by research at Politecnico di Torino and University of Padua. Attitude control systems used star trackers and reaction wheels similar to those sourced by Honeywell Aerospace and Bosch, with ground calibration protocols coordinated with INRIM.
PRISMA was launched aboard a Vega vehicle from the Guiana Space Centre operated by Arianespace, reflecting launch partnerships similar to those supporting Sentinel missions. The satellite was inserted into a sun-synchronous low Earth orbit to provide repeatable illumination and revisit characteristics comparable to Landsat 8, Sentinel-2A, and Terra. Orbit parameters supported swath and temporal coverage designed to coordinate observations with other platforms like Planet Labs constellations, Spire Global sensors, and commercial systems operated by Maxar Technologies for synergistic data fusion.
Mission operations were managed through a ground segment architecture involving agencies and contractors such as ASD, ASI, e-GEOS, and European ground stations in networks akin to ESA Ground Stations Network, KSAT, and Svalbard Satellite Station. Data products included calibrated hyperspectral reflectance cubes, panchromatic orthorectified imagery, georeferenced level products comparable to USGS and Copernicus processing levels, and higher-level thematic maps for vegetation indices used by groups like FAO and UNEP. On-board processing reduced data volumes employing compression algorithms similar to standards promoted by CCSDS and commercial middleware from vendors like Atos and Thales Group.
PRISMA provided spectral data applicable to precision agriculture used by companies such as Bayer Crop Science and John Deere, forestry monitoring relevant to WWF initiatives, coastal and marine studies aligning with IOC-UNESCO priorities, and urban mapping benefiting municipal programmes and firms like Accenture and IBM. Scientific communities in remote sensing, ecology, hydrology, and climatology used PRISMA data for spectral unmixing, biophysical parameter retrieval, and change detection complementary to studies leveraging datasets from MODIS, ASTER, Sentinel-3, and Landsat 9.
The programme was coordinated by the Italian Space Agency with industrial leadership from OHB Italia and partnerships across European institutions including ESA centres, national research organisations such as CNR and INAF, and international collaborators like NASA, CNES, DLR, JAXA, and commercial partners such as Airbus, Thales Alenia Space, and Leonardo S.p.A.. Management practices mirrored cooperative frameworks used in Copernicus and bilateral agreements similar to those between Italy and France or Italy and United States. The mission’s results contributed to European Earth observation strategies discussed within forums like European Commission directorates and influenced follow-on proposals in research programmes funded by Horizon 2020 and its successor Horizon Europe.
Category:Satellites of Italy Category:Earth observation satellites Category:Hyperspectral imaging