Coherent All-Sky Monitor
Fourier Space designed and is currently developing the Data Acquisition, Corner Turn, and Data Monitor components of the Owens Valley Coherent All-Sky Monitor (CASM). This 256-element interferometer is being constructed by Harvard University Centre for Astrophysics (CfA) to discover Fast Radio Bursts (FRBs).
From each of the 256 elements, Fourier Space’s Data Acquisition system receives 96 MHz of bandwidth divided into 3072 x ~31 kHz channels. The Data Acquisition system writes these data to CPU memory at ~390 Gb/s and integrates with the GPU correlator and beam-former developed at Harvard.
The output of the beam-former is sent to Fourier Space’s Corner Turn, which transmits the signals to Beam Processors for secondary processing.
Fourier Space’s Data Monitors continuously monitor the data streams from each antenna element and produce metrics that enable the telescope operators to evaluate the signal quality at the time of observation.
The Data Acquisition, Corner Turn, and Data Monitor components execute on 2 servers, each with 4 x 100 Gb links.