header:
  dimensions:
    num_records: 0
  global_attributes:
    acknowledgement: GRACE-FO is a joint mission of the US National Aeronautics and Space Administration and the German Research Center for Geosciences.  Use the digital object identifier provided in the id attribute when citing this data.  See https://podaac.jpl.nasa.gov/CitingPODAAC
    conventions: CF-1.6, ACDD-1.3, ISO 8601
    creator_email: gracefo@podaac.jpl.nasa.gov
    creator_institution: NASA/JPL
    creator_name: GRACE Follow-On Science Data System
    creator_type: group
    creator_url: http://gracefo.jpl.nasa.gov
    date_created: 2026-06-24T16:25:49Z
    date_issued: 2026-06-24T17:30:23Z
    history:
      []
    id: 10.5067/GFJPL-L1B04
    institution: NASA/JPL
    instrument: ACC
    instrument_vocabulary: NASA Global Change Master Directory instrument keywords
    keywords: GRACE-FO, ACC
    keywords_vocabulary: NASA Global Change Master Directory (GCMD) Science Keywords
    license: https://science.nasa.gov/earth-science/earth-science-data/data-information-policy
    naming_authority: org.doi.dx
    platform: GRACE D
    platform_vocabulary: NASA Global Change Master Directory platform keywords
    processing_level: 1B
    product_version: 04
    program: NASA Earth Systematic Missions Program
    project: NASA Gravity Recovery And Climate Experiment Follow-On (GRACE-FO)
    publisher_email: podaac@jpl.nasa.gov
    publisher_institution: NASA/JPL
    publisher_name: Physical Oceanography Distributed Active Archive Center
    publisher_type: group
    publisher_url: http://podaac.jpl.nasa.gov
    references: https://podaac.jpl.nasa.gov/gravity/gracefo-documentation
    source: Transformed Accelerometer data for GRACE D
    summary: Transformed 1-Hz linear and angular accelerations of the ACC proof mass in SRF
    time_coverage_start: 2000-01-01T12:00:00.00
    time_coverage_stop: 2000-01-01T12:00:00.00
    title: GRACE-FO Level-1B Transformed Accelerometer Data
  non-standard_attributes:
    epoch_time: 2000-01-01T12:00:00.00
    software_build_time: 2023-06-21T17:10:46 UTC
    software_version: V04.10.2020-11-09-77-gc5e91-dirty
    start_time_epoch_secs: 0
    stop_time_epoch_secs: 0
  variables:
    - gps_time:
        comment: 1st column
        coverage_content_type: referenceInformation
        long_name: Continuous seconds past 01-Jan-2000 11:59:47 UTC
        units: second
    - GRACEFO_id:
        comment: 2nd column
        coverage_content_type: referenceInformation
        long_name: GRACE-FO satellite identifier
        units: char
        valid_range: C,D
        value_meanings:
          - C = GRACE-FO 1 (GRACE C)
          - D = GRACE-FO 2 (GRACE D)
    - lin_accl_x:
        comment: 3rd column
        coverage_content_type: physicalMeasurement
        long_name: Linear acceleration along X-axis
        units: m/s2
    - lin_accl_y:
        comment: 4th column
        coverage_content_type: physicalMeasurement
        long_name: Linear acceleration along Y-axis
        units: m/s2
    - lin_accl_z:
        comment: 5th column
        coverage_content_type: physicalMeasurement
        long_name: Linear acceleration along Z-axis
        units: m/s2
    - ang_accl_x:
        comment: 6th column
        coverage_content_type: physicalMeasurement
        long_name: Angular acceleration about X-axis, 0 for ACT1B
        units: rad/s2
    - ang_accl_y:
        comment: 7th column
        coverage_content_type: physicalMeasurement
        long_name: Angular acceleration about Y-axis, 0 for ACT1B
        units: rad/s2
    - ang_accl_z:
        comment: 8th column
        coverage_content_type: physicalMeasurement
        long_name: Angular acceleration about Z-axis, 0 for ACT1B
        units: rad/s2
    - acl_x_res:
        comment: 9th column
        coverage_content_type: modelResult
        long_name: Residual of lin_accl_x from non-CRN-filtered value
        units: m/s2
    - acl_y_res:
        comment: 10th column
        coverage_content_type: modelResult
        long_name: Residual of lin_accl_y from non-CRN-filtered value
        units: m/s2
    - acl_z_res:
        comment: 11th column
        coverage_content_type: modelResult
        long_name: Residual of lin_accl_z from non-CRN-filtered value
        units: m/s2
    - qualflg:
        comment: 12th column
        coverage_content_type: qualityInformation
        flag_masks: 1b, 2b, 4b, 8b, 16b, 32b, 64b, 128b
        flag_meanings:
          - bit 0 = Vp (proof mass voltage) out of nominal range
          - bit 1 = Not defined
          - bit 2 = At least one of acl_x_res, acl_y_res, and acl_z_res is > 10 microns/s^2
          - bit 3 = Extrapolated CLK1B clock offset value used for data point > 5 s from center of CRN filter window
          - bit 4 = Extrapolated CLK1B clock offset value used for data point <= 5 s from center of CRN filter window
          - bit 5 = Interpolated data point (due to gap) exists > 15 s from center of CRN filter window
          - bit 6 = Interpolated data point (due to gap) exists > 5 s but < 15 s from center of CRN filter window
          - bit 7 = Interpolated data point (due to gap) exists < 5 s from center of CRN filter window
        long_name: Data quality flag
# End of YAML header
