the prisma mission hyperspectral payload

Paper number

IAC-15,B1,3,7,x30270

Author

Dr. Marco Meini, Selex ES, Italy

Coauthor

Mr. Roberto Formaro, Agenzia Spaziale Italiana (ASI), Italy

Coauthor

Mr. Giancarlo Varacalli, Italian Space Agency (ASI), Italy

Coauthor

Mr. Francesco Longo, Agenzia Spaziale Italiana (ASI), Italy

Coauthor

Mr. Lorenzo Giunti, Selex Galileo, Italy

Coauthor

Dr. Enrico Fossati, Selex ES S.p.A., Italy

Coauthor

Dr. Marco MOLINA, Selex ES, Italy

Year

2015

Abstract

The  PRISMA  (PRecursore  IperSpettrale  della  Missione  Applicativa)  Programme  is  an  ASI  (Agenzia  Spaziale  Italiana) 
hyperspectral  mission  for  Earth  observation  based  on  a  mono-payload  satellite.  An  Italian  Consortium  is  in  charge  to 
realize  the  mission;  Selex  ES  has  the  full  responsibility  of  the  hyperspectral  payload,  composed  by  a  high  spectral 
resolution  spectrometer optically integrated  with a  medium  resolution panchromatic camera, and the related calibration 
activities. 
PRISMA,  from  a  sun-synchronous  orbit  at  about  620Km  altitude,  acquires  areas  with  a  swath  width  of  30km  with  a 
Ground  Sampling  Distance  (GSD)  of  30m,  covering  the  wavelength  range  from  400nm  to  2500nm  with  two  partially 
overlapped  spectrometer  channels  dedicated  to  VNIR  and  SWIR.  Simultaneously,  a  panchromatic  camera  acquires  the 
same area with a spatial resolution of 5m GSD.  
The optical design is based on a high transmittance optical assembly, including a reflective common telescope in Three-Mirror Anastigmat (TMA) configuration, a single slit aperture, a panchromatic camera (700-900 nm) and a spectrometer 
with  two  channels  (VNIR  and  SWIR),  spectrally  separated  by  a  beam  splitter,  using  prisms  as  dispersive  media  in  a 
configuration  conceived to minimize the number of optical elements. High performance MCT-based detectors represent 
the core of the instrument. To provide the required data quality for the entire mission lifetime of 5 years, an accurate and 
stable on-board calibration unit, both radiometric and spectral, will guarantee continuous in-flight instrument calibration. 
The  thermal  design  is  based  on  a  cold-biased,  passive  cooling  system:  a  double  stage  radiator,  suitable  oriented  and 
protected from environmental heat fluxes, high performance cryogenic heat pipes and an operational heaters network is 
the solution adopted to achieve the required thermal stability. 
PRISMA is scheduled to be launched before the end of 2017.

Abstract document

IAC-15,B1,3,7,x30270.brief.pdf

Manuscript document

IAC-15,B1,3,7,x30270.pdf (🔒 authorized access only).

To get the manuscript, please contact IAF Secretariat.