The LWA has operated two generations of all-sky imagers. Orville is the current-generation Bifrost-based GPU wideband imager, operating at multiple LWA stations. PASI (Prototype All-Sky Imager) was the first-generation system. Both produce all-sky images in all four Stokes parameters.
Orville is a Bifrost-based GPU wideband imager for the Next Generation Digital Processor. It generates real-time all-sky images in all four Stokes parameters on a five second cadence. Images are stored in binary .oims format and can be read in Python using the OrvilleImageDB.py module from the Orville Wideband Imager repository.
Starting in early 2026, Orville .oims files include per-integration and per-frequency channel quality metrics from the Oarfish classifier. The data are provided with basic astrometry but are otherwise uncalibrated.
Each station archive includes a README.md with citation and acknowledgement text. Please refer to the README.md in the relevant archive directory before publishing.
PASI (Prototype All-Sky Imager) was the first-generation all-sky imaging system for the LWA. Images are stored in binary .pims format and can be read in Python using the pasi_image module.
Each station archive includes a README.md with citation and acknowledgement text. Please refer to the README.md in the relevant archive directory before publishing.