On-board processing using reconfigurable hardware on the solar orbiter PHI instrument

Lange, Tobias; Fiethe, Björn; Michel, Holger; Michalik, H.; Albert, K.; Hirzberger, J.

doi:10.1109/ahs.2017.8046377

Cited by 8 publications

(7 citation statements)

References 4 publications

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“…RTE inversion, or a group of different image processing functions), and load them into the RFPGAs as needed. 7 To fulfil the requirement on easily changing the pipelines a block approach is taken. The blocks access the image processing functions running on the RFPGAs, or the microprocessor in back-up implementation, and combine them into useful steps.…”

Section: Implementation Of the Data Processing Systemmentioning

confidence: 99%

Autonomous on-board data processing and instrument calibration software for the SO/PHI

Albert

Hirzberger

Busse

et al. 2018

Software and Cyberinfrastructure for Astronomy V

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The extension of on-board data processing capabilities is an attractive option to reduce telemetry for scientific instruments on deep space missions. The challenges that this presents, however, require a comprehensive software system, which operates on the limited resources a data processing unit in space allows. We implemented such a system for the Polarimetric and Helioseismic Imager (PHI) on-board the Solar Orbiter (SO) spacecraft. It ensures autonomous operation to handle long command-response times, easy changing of the processes after new lessons have been learned and meticulous book-keeping of all operations to ensure scientific accuracy. This contribution presents the requirements and main aspects of the software implementation, followed by an example of a task implemented in the software frame, and results from running it on SO/PHI. The presented example shows that the different parts of the software framework work well together, and that the system processes data as we expect. The flexibility of the framework makes it possible to use it as a baseline for future applications with similar needs and limitations as SO/PHI.

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Section: Implementation Of the Data Processing Systemmentioning

confidence: 99%

Autonomous on-board data processing and instrument calibration software for the SO/PHI

Albert

Hirzberger

Busse

et al. 2018

Software and Cyberinfrastructure for Astronomy V

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“…While the HRT has the operational capability of a 60 second cadence, during the cruise phase a 96 second cadence was used. This was done using a PMP scheme of [4,5]. At each wavelength position, 4 frames are taken for each modulation state, and this is cycled through each modulation state 5 times, resulting in 20 total frames for each modulation state at each wavelength position.…”

Section: The Instrumentmentioning

confidence: 99%

“…During normal operations to conserve telemetry, the raw images from the two telescopes are reduced onboard using field-programmable gate array (FPGA) computers, producing the data products which are downlinked to Earth. 4,5 However there are occasions during the nominal and extended mission phases when telemetry rates will be favourable such that raw images can be downloaded and reduced on-ground. The ability to reduce data onground provides more opportunities for fine-tuning the data reduction process, and therefore for producing higher quality data products.…”

Section: Introductionmentioning

confidence: 99%

The on-ground data reduction and calibration pipeline for SO/PHI-HRT

Sinjan¹,

Calchetti

Hirzberger

et al. 2022

Software and Cyberinfrastructure for Astronomy VII

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The ESA/NASA Solar Orbiter space mission has been successfully launched in February 2020. Onboard is the Polarimetric and Helioseismic Imager (SO/PHI), which has two telescopes, a High Resolution Telescope (HRT) and the Full Disc Telescope (FDT). The instrument is designed to infer the photospheric magnetic field and line-of-sight velocity through differential imaging of the polarised light emitted by the Sun. It calculates the full Stokes vector at 6 wavelength positions at the Fe I 617.3 nm absorption line. Due to telemetry constraints, the instrument nominally processes these Stokes profiles onboard, however when telemetry is available, the raw images are downlinked and reduced on ground. Here the architecture of the on-ground pipeline for HRT is presented, which also offers additional corrections not currently available on board the instrument. The pipeline can reduce raw images to the full Stokes vector with a polarimetric sensitivity of 10 −3 • I c or better.

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“…The lowermost layer (primitives) implements the image processing functions, e.g., addition of images or Fourier transform of an image. These are implemented both as RFPGA functionalities 32 and as software functions running on the system controller microprocessor. Due to the large number of functions one RFPGA configuration is not sufficient, therefore the RFPGA is reconfigured on demand, during the processing.…”

Section: Software Architecturementioning

confidence: 99%

Autonomous on-board data processing and instrument calibration software for the Polarimetric and Helioseismic Imager on-board the Solar Orbiter mission

Albert

Hirzberger

Kolleck

et al. 2020

J. Astron. Telesc. Instrum. Syst.

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On-board processing using reconfigurable hardware on the solar orbiter PHI instrument

Cited by 8 publications

References 4 publications

Autonomous on-board data processing and instrument calibration software for the SO/PHI

Autonomous on-board data processing and instrument calibration software for the SO/PHI

The on-ground data reduction and calibration pipeline for SO/PHI-HRT

Autonomous on-board data processing and instrument calibration software for the Polarimetric and Helioseismic Imager on-board the Solar Orbiter mission

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