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ASFS Fast Sonic Zarr

Path:

  • /data/aurora/products/asfs_fast_sonic/asfs_fast_sonic.zarr

Dataset shape

  • dimension: time
  • deployed shape after the CRD parser update, checked on 2026-05-21:
  • time=2178419
  • time coverage when checked: 2026-05-02 00:00:30.027 to 2026-05-21 20:00:10
  • sorted unique time coordinate

Time coordinate

  • time is parsed from TIMESTAMP
  • metek_msec_out is used to preserve sub-second timing
  • both old daily LoggerNet files and newer chunked CRD files are supported

Useful root attributes

  • instrument = "asfs-fast-sonic"
  • title = "ASFS fast-sonic data"
  • source = "asfs-logger_fast_sonic_DD_MM_YYYY.dat or aurora_asfs_data_fast_sonic_YYYYMMDDHHMM.dat"

Variable layout

The deployed store currently contains these 10 variables:

  • RECORD
  • metek_InclX_out
  • metek_InclY_out
  • metek_T_out
  • metek_msec_out
  • metek_quality_out
  • metek_senspathstate_out
  • metek_x_out
  • metek_y_out
  • metek_z_out

Schema note

  • append runs keep the existing variable set fixed in the same way as asfs-logger
  • the May 17, 2026 rebuild spans the old daily LoggerNet files and the newer CRD chunks; missing values for variables that do not exist in a given source format are stored as NaN
  • append writes materialize only the already-filtered new sample block before writing, matching the cross-instrument Zarr append policy

Chunking

  • time-only variables are chunked (24000,)

UI note

This Zarr remains part of the deployed data products and quicklook pipeline, but ASFS fast-sonic is currently not exposed as a normal interactive or quicklook instrument in the main dashboard selectors.