Analog Signal Chain
- Clover feed antenna:
- LNA 0.4-0.8 GHz 44dB: Low-noise amplifier (First stage, installed on the focal line)
- FLA 0.4-0.8 GHz 33dB: Filter amplifier (Second stage, installed in the receiver huts)
Real-time Data Acquisition System
The CHIME real-time acquisition pipeline is built up out of a number of general-purpose packages used by CHIME and other, similar instruments, as well as bespoke code written explicitly for the CHIME science requirements.
CHIME real-time pipeline software includes:
- The CHIME F-Engine runs the Python chFPGA software
- The CHIME X-Engine is powered by kotekan, a high-performance data-processing system. doi:10.5281/zenodo.5842659
- The CHIME Data Archive is managed by alpenhorn, a scalable, distributed, archive manager.
Analysis Software
The CHIME data reduction and analysis effort has resulted in the development of the caput Python pipeline framework. Caput and other general-purpose tools for the analysis of radio cosmology date are available from the Radio Cosmology project on GitHub. This includes:
- caput, a collection of general and astronomy-specific utilities, including MPI-distributed HDF5 datasets and pipeline infrastructure designed for large compute clusters doi:10.5281/zenodo.5846374
- cora, sky simulations, with a focus on 21 cm intensity mapping doi:10.5281/zenodo.5949194
- draco, implementing core tasks (stages) of the CHIME Cosmology analysis pipeline doi:10.5281/zenodo.5828372
- driftscan, implementing different types of transit radio interferometers, particularly for 21cm cosmology doi:10.5281/zenodo.5828372
- fluxcat, a catalogue of measured flux densities of astronomical sources
In addition to these telescope-agnostic packages, other CHIME-specific code can be found in the CHIME Experiment GitHub organisation. Most importantly:
- ch_pipeline, the primary CHIME analysis pipeline, built on top of caput and other Radio Cosmology packages. doi:10.5281/zenodo.5846378