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  4. 4.01 Rapporti tecnici INAF
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28811
Title: End-to-end numerical simulator of the Shadow Position Sensor (SPS) metrology subsystem of the PROBA-3 ESA mission
Authors: AMADORI, FRANCESCO 
CAPOBIANCO, Gerardo 
LOREGGIA, Davide 
CASTI, MARTA 
BEMPORAD, Alessandro 
FINESCHI, Silvano 
NOCE, VLADIMIRO 
ZANGRILLI, Luca 
BELLUSO, Massimiliano 
PANCRAZZI, Maurizio 
Issue Date: 2020
Series: INAF Technical Reports - Rapporti Tecnici INAF 
Report: 65
Abstract: PROBA-3 - PRoject for OnBoard Autonomy is an ESA mission to be launched in 2022 where a spacecraſt is used as an external occulter (OSC-Occulter Spacecraſt), to create an artificial solar eclipse as observed by a second spacecraſt, the coronagraph (CSC-Coronagraph Spacecraſt). The two spacecraſts (SCs) will orbit around the Earth, with an highly elliptic orbit (HEO), with the perigee at 600 Km, the apogee at about 60530 Km and an eccentricity of 0.81. The orbital period is of 19.7 hours and the precise formation flight (within 1 mm) will be maintainedforabout6hours overthe apogee, in ordertoguarantee the observation ofthe solarcoronawith the required spatial resolution. The relative alignment ofthe two spacecraſts is obtained bycombining information from several subsystems. One ofthe most accurate subsystem (with accuracy >0.5 mm) is the Shadow Position Sensors (SPS), composed by eight photomultipliers installed around the entrance pupil of the CSC. The SPS will monitor the penumbra generated by the occulter spacecraſt, whose intensity will change according to the relative position ofthe two satellites. A dedicated algorithm has been developed to retrieve the displacementof the spacecraſts fromthe measurements ofthe SPS. Several tests are requiredin ordertoevaluate the robustness of the algorithm and its performances/results for different possible configurations. A soſtware simulator has been developed for this purpose. The simulator includes the possibility to generate synthetic 2-D penumbra profile maps or analyze measured profiles and run different versions ofthe retrieving algorithms, including the “on-board” version. In order to import the “as built” algorithms, the soſtware is coded using Matlab.
Acknowledgments: I would like to thank the INAF-OATo's Director Silvano Fineschi and my project supervisors, Davide Loreggia and Gerardo Capobianco. They have a lot of faith in me and in my work and it is a pleasure to wirte my first Technical Note for INAF under their oversight.
URI: http://hdl.handle.net/20.500.12386/28811
http://dx.doi.org/10.20371/INAF/TechRep/65
Fulltext: open
Appears in Collections:4.01 Rapporti tecnici INAF

Files in This Item:
File Description SizeFormat
P3_INF_TN_20033_SPS_end_to_end_simulator_v1_0.pdfTechnical Note3.1 MBAdobe PDFView/Open
2020 modello-autorizzazione Amadori.pdf[Administration only]293.52 kBAdobe PDF
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