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Data Release: Data Challenge 0 (DC-0)

Description

CMB-S4 Data Challenges involve the simulation, reduction, and analysis of a mock dataset corresponding to the current point design of the instruments and their observations and is used:

  • to validate that the point design meets all of the project’s measurement and science requirements
  • to verify that the project pipelines run sufficiently fast on that generation’s computational architecture(s), and scale sufficiently well to the CMB-S4 data volume.

DC-0 is the first execution of a Data Challenge run, it has been completed for Large Aperture Telescopes located in Chile (CHLAT), the Small Aperture Telescopes located in the South Pole (SPSAT) and the South Pole Large Aperture telescope (SPLAT).

The full documentation of the release will be made available publicly. The documentation for DC0 is in the DC0 repository on Github, only accessible to members of the CMB-S4 Github organization.

Data Access

Data access is currently restricted to members of the CMB-S4 Collaboration via a Globus Group.

See the homepage of the data portal for details on how to access and download the data.

Data Products & Organization

The DC-0 data release includes a single Intensity and Polarization HEALPix map in FITS format for each split and for each frequency channel which includes:

  • Galactic foregrounds
  • Extragalactic foregrounds
  • Cosmic Microwave Background signal
  • Atmospheric and instrumental noise

and a second map which includes the map depth for Temperature and for Polarization. More details about the data products are available in the map FITS headers and in the Validation of the CMB-S4 Conceptual Design with Data Challenge 0 document (in preparation, currently available only to CMB-S4 members).

depth map plot

Depth map for temperature for Chilean LAT in Equatorial coordinates.

Data splits are created by simulating each 1-hour long observation independently, then coadding all of them to create the full mission dataset Split01 and coadding the observation in a round-robin fashion in 2, 4, 8, 16 and 32 independent maps.

All other data products are available on the CMB-S4 community filesystem at NERSC at /global/cfs/cdirs/cmbs4/dc/dc0/mission/.

Datasets & Files

Files are grouped into datasets by telescope, time split, and frequency band. Each dataset is contained within a single folder and may contain subfolders. The top-level dataset folder contains a JSON file (manifest.json) using the BDBag remote file manifest format with the checksum, size, and HTTPS URL of each file.

The dataset pages provide a link to the dataset’s folder in the Globus web app and links to the the invidual files for immediate download.

Link Telescope Split Frequency Band (GHz) Number of Files Total Size
Link CHLAT 01 025 7 17.3 GiB
Link CHLAT 01 040 7 17.3 GiB
Link CHLAT 01 090 7 17.3 GiB
Link CHLAT 01 150 7 17.3 GiB
Link CHLAT 01 230 7 17.3 GiB
Link CHLAT 01 280 7 17.3 GiB
Link CHLAT 02 025 14 34.5 GiB
Link CHLAT 02 040 14 34.5 GiB
Link CHLAT 02 090 14 34.5 GiB
Link CHLAT 02 150 14 34.5 GiB
Link CHLAT 02 230 14 34.5 GiB
Link CHLAT 02 280 14 34.5 GiB
Link CHLAT 04 025 28 69.0 GiB
Link CHLAT 04 040 28 69.0 GiB
Link CHLAT 04 090 28 69.0 GiB
Link CHLAT 04 150 28 69.0 GiB
Link CHLAT 04 230 28 69.0 GiB
Link CHLAT 04 280 28 69.0 GiB
Link CHLAT 08 025 56 138.0 GiB
Link CHLAT 08 040 56 138.0 GiB
Link CHLAT 08 090 56 138.0 GiB
Link CHLAT 08 150 56 138.0 GiB
Link CHLAT 08 230 56 138.0 GiB
Link CHLAT 08 280 56 138.0 GiB
Link CHLAT 16 025 112 276.0 GiB
Link CHLAT 16 040 112 276.0 GiB
Link CHLAT 16 090 112 276.0 GiB
Link CHLAT 16 150 112 276.0 GiB
Link CHLAT 16 230 112 276.0 GiB
Link CHLAT 16 280 112 276.0 GiB
Link CHLAT 32 025 224 552.0 GiB
Link CHLAT 32 040 224 552.0 GiB
Link CHLAT 32 090 224 552.0 GiB
Link CHLAT 32 150 224 552.0 GiB
Link CHLAT 32 230 224 552.0 GiB
Link CHLAT 32 280 224 552.0 GiB
Link SPSAT 01 025 8 23.7 GiB
Link SPSAT 01 040 8 25.1 GiB
Link SPSAT 01 085 8 29.6 GiB
Link SPSAT 01 095 8 30.1 GiB
Link SPSAT 01 145 8 29.8 GiB
Link SPSAT 01 155 8 30.2 GiB
Link SPSAT 01 230 8 31.0 GiB
Link SPSAT 01 280 8 31.0 GiB
Link SPSAT 02 025 14 552.1 MiB
Link SPSAT 02 040 14 552.1 MiB
Link SPSAT 02 085 14 552.1 MiB
Link SPSAT 02 095 14 552.1 MiB
Link SPSAT 02 145 14 552.1 MiB
Link SPSAT 02 155 14 552.1 MiB
Link SPSAT 02 230 14 552.1 MiB
Link SPSAT 02 280 14 552.1 MiB
Link SPSAT 04 025 28 1.1 GiB
Link SPSAT 04 040 28 1.1 GiB
Link SPSAT 04 085 28 1.1 GiB
Link SPSAT 04 095 28 1.1 GiB
Link SPSAT 04 145 28 1.1 GiB
Link SPSAT 04 155 28 1.1 GiB
Link SPSAT 04 230 28 1.1 GiB
Link SPSAT 04 280 28 1.1 GiB
Link SPSAT 08 025 56 2.2 GiB
Link SPSAT 08 040 56 2.2 GiB
Link SPSAT 08 085 56 2.2 GiB
Link SPSAT 08 095 56 2.2 GiB
Link SPSAT 08 145 56 2.2 GiB
Link SPSAT 08 155 56 2.2 GiB
Link SPSAT 08 230 56 2.2 GiB
Link SPSAT 08 280 56 2.2 GiB
Link SPSAT 16 025 112 4.3 GiB
Link SPSAT 16 040 112 4.3 GiB
Link SPSAT 16 085 112 4.3 GiB
Link SPSAT 16 095 112 4.3 GiB
Link SPSAT 16 145 112 4.3 GiB
Link SPSAT 16 155 112 4.3 GiB
Link SPSAT 16 230 112 4.3 GiB
Link SPSAT 16 280 112 4.3 GiB
Link SPSAT 32 025 224 8.6 GiB
Link SPSAT 32 040 224 8.6 GiB
Link SPSAT 32 085 224 8.6 GiB
Link SPSAT 32 095 224 8.6 GiB
Link SPSAT 32 145 224 8.6 GiB
Link SPSAT 32 155 224 8.6 GiB
Link SPSAT 32 230 224 8.6 GiB
Link SPSAT 32 280 224 8.6 GiB
Link SPLAT 01 020 7 17.3 GiB
Link SPLAT 01 025 7 17.3 GiB
Link SPLAT 01 040 7 17.3 GiB
Link SPLAT 01 090 7 17.3 GiB
Link SPLAT 01 150 7 17.3 GiB
Link SPLAT 01 230 7 17.3 GiB
Link SPLAT 01 280 7 17.3 GiB
Link SPLAT 02 020 14 34.5 GiB
Link SPLAT 02 025 14 34.5 GiB
Link SPLAT 02 040 14 34.5 GiB
Link SPLAT 02 090 14 34.5 GiB
Link SPLAT 02 150 14 34.5 GiB
Link SPLAT 02 230 14 34.5 GiB
Link SPLAT 02 280 14 34.5 GiB
Link SPLAT 04 020 28 69.0 GiB
Link SPLAT 04 025 28 69.0 GiB
Link SPLAT 04 040 28 69.0 GiB
Link SPLAT 04 090 28 69.0 GiB
Link SPLAT 04 150 28 69.0 GiB
Link SPLAT 04 230 28 69.0 GiB
Link SPLAT 04 280 28 69.0 GiB
Link SPLAT 08 020 56 138.0 GiB
Link SPLAT 08 025 56 138.0 GiB
Link SPLAT 08 040 56 138.0 GiB
Link SPLAT 08 090 56 138.0 GiB
Link SPLAT 08 150 56 138.0 GiB
Link SPLAT 08 230 56 138.0 GiB
Link SPLAT 08 280 56 138.0 GiB
Link SPLAT 16 020 112 276.0 GiB
Link SPLAT 16 025 112 276.0 GiB
Link SPLAT 16 040 112 276.0 GiB
Link SPLAT 16 090 112 276.0 GiB
Link SPLAT 16 150 112 276.0 GiB
Link SPLAT 16 230 112 276.0 GiB
Link SPLAT 16 280 112 276.0 GiB
Link SPLAT 32 020 224 552.0 GiB
Link SPLAT 32 025 224 552.0 GiB
Link SPLAT 32 040 224 552.0 GiB
Link SPLAT 32 090 224 552.0 GiB
Link SPLAT 32 150 224 552.0 GiB
Link SPLAT 32 230 224 552.0 GiB
Link SPLAT 32 280 224 552.0 GiB