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: 2026-03-31T16:24:07Z
    date_issued: 2026-04-06T13:49:38Z
    history:
      []
    id: 10.5067/GFJPL-L1B04
    institution: NASA/JPL
    instrument: LRI
    instrument_vocabulary: NASA Global Change Master Directory instrument keywords
    keywords: GRACE-FO, LRI
    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 Y
    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: Inter-satellite range, range rate and range acceleration from LRI between GRACE-FO satellites
    summary: 0.5-Hz biased inter-satellite ranges and their first two time derivatives, range rate and range acceleration, from LRI ranging
    time_coverage_start: 2000-01-01T12:00:00.00
    time_coverage_stop: 2000-01-01T12:00:00.00
    title: GRACE-FO Level-1B LRI Range 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
    - biased_range:
        comment: 2nd column
        coverage_content_type: physicalMeasurement
        long_name: CRN-filtered biased inter-satellite range
        units: m
    - range_rate:
        comment: 3rd column
        coverage_content_type: modelResult
        long_name: First time derivative of biased_range
        units: m/s
    - range_accl:
        comment: 4th column
        coverage_content_type: modelResult
        long_name: Second time derivative of biased_range
        units: m/s2
    - iono_corr:
        comment: 5th column
        coverage_content_type: modelResult
        long_name: estimated scale correction epsilon for biased range, range rate, and range accl due to unknown onboard LRI frequency (scale correction = 1 + epsilon)
    - lighttime_corr:
        comment: 6th column
        coverage_content_type: modelResult
        long_name: Light time correction for biased_range
        units: m
    - lighttime_rate:
        comment: 7th column
        coverage_content_type: modelResult
        long_name: Light time correction for range_rate
        units: m/s
    - lighttime_accl:
        comment: 8th column
        coverage_content_type: modelResult
        long_name: Light time correction for range_accl
        units: m/s2
    - ant_centr_corr:
        comment: 9th column
        long_name: not defined
    - ant_centr_rate:
        comment: 10th column
        long_name: not defined
    - ant_centr_accl:
        comment: 11th column
        long_name: not defined
    - K_A_SNR:
        comment: 12th column
        coverage_content_type: modelResult
        long_name: CNR of laser ranging for GRACE-FO C satellite
        units: db-Hz
    - Ka_A_SNR:
        comment: 13th column
        long_name: not defined
    - K_B_SNR:
        comment: 14th column
        coverage_content_type: modelResult
        long_name: CNR of laser ranging for GRACE-FO D satellite
        units: db-Hz
    - Ka_B_SNR:
        comment: 15th column
        long_name: not defined
    - qualflg:
        comment: 16th column
        coverage_content_type: qualityInformation
        flag_masks: 1b, 2b, 4b, 8b, 16b, 32b, 64b, 128b
        flag_meanings:
          - bit 0 = Phase break
          - bits 1-5
          - bit 6 = Interpolated data point (due to gap) exists > 5 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: Quality flags, rightmost is bit 0
# End of YAML header
