Geodaysit 2023

F. Sarti


PRISMA Operational Activity Description
Francesco Nirchio, N. Lombardi, G. Viavattene, A. Cenci, P. Tempesta, V. Ferri, L. Agrimano, D. Iacovone, I. Corradino, L. Chiarantini, F. Sarti

PRISMA Operational Activity Description
F. Nirchio1, N. Lombardi1, G. Viavattene1, A. Cenci2, P. Tempesta2, V. Ferri2, L. Agrimano3, D. Iacovone4, I. Corradino5, L. Chiarantini6, F. Sarti6
1 Agenzia Spaziale Italiana (ASI), Contrada Terlecchia, 75100, Matera (MT)
2 Telespazio S.p.A., Via Tiburtina 965, 00156, Roma (RM)
3 Planetek Italia s.r.l., Via Massaua 12, 70132, Bari (BA)
4 e-GEOS S.p.A., Contrada Terlecchia, 75100, Matera (MT)
5 OHB Italia S.p.A., Via Gallarate, 150, 20151, Milano (MI)
6 Leonardo SpA, Via delle Officine Galileo, 1, 50013 Campi Bisenzio, Firenze (FI)

Objective of the presentation is to give an inside look into PRISMA operational activities, firstly summarizing the Missions functionality and subsequently describing the main activities that are carried on by the operational team, finally some statistical data on the mission are provided.
PRISMA (PRecursore IperSpettrale della Missione Applicativa) is a medium-resolution hyperspectral (HYP) and high-resolution panchromatic (PAN) imaging satellite fully funded by ASI and realized by Italian Industries Consortium led by OHB Italia, Leonardo and Telespazio. Launched on March 2019, PRISMA is devoted to the push-broom imaging of land, vegetation, waters and coastal zones for a planned operative period of 5 years.
The HYP module has a spatial resolution of 30 m, a spectral resolution of 12 nm and operates in the VNIR (400-1010 nm) and in the SWIR (920-2505 nm) with a swath width of 30 km. The PAN module has a spatial resolution up to 5 m and operates in the visible spectral range of 400-700 nm. The Sun Synchronous Orbit at 615 km of altitude and the orbital period of 97 minutes allow a repeat cycle of 29 days.
It is operational since February 2020. The mission is composed, along with the space segment, also by User Ground segment, located in ASI Matera Space Centre and the Mission Control Centre, located in Telespazio Fucino Space Centre.
To ensure the Mission performances some routine operations are performed. First of all the maintenance of the orbit and of the track. It is assured by the Space Control Centre and the Flight Dynamic System (FDS). Those functions are also involved any time a collision avoidance manoeuvre is requested. Satellite pointing accuracy, products geolocation and radiometric accuracy are regularly check over selected ground sites.
In order to evaluate the PRISMA health status all the telemetry data are regularly collected and evaluated by the mission specialists and every four months by a dedicated mission board.
During Prisma operational life any time a non-conformance (NC) behaviour is detected or a component failure is checked a Non-Conformity Report (NCR) form is issued. A trouble shooting activity starts involving the Support Engineering Team (SET) which examine any component of the system suspected to be involved in order to determine the causes and implement all the corrective actions. The fixing activities and results are evaluated by a Non-conformance Review Board (NRB).
Any registered user can place its orders on the PRISMA web portal both for new acquisitions and for processing the archive data in order to receive a desired product from the archived images. The user can obtain Level 1 products, corresponding to the Top Of Atmosphere (TOA) radiometrically and geometrically calibrated HYP and PAN radiance images, or Level 2 products corresponding to Bottom Of Atmosphere (BOA) geolocated (L2B, L2C) and geocoded (L2D) atmospherically corrected HYP and PAN images. In case of need, the user can receive support by help desk that can be contacted by e-mail.

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