header:
  dimensions:
    num_records: 24
  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: 2026-07-28T15:35:20Z
    date_issued: 2026-08-03T15:17:32Z
    history:
      - "INPUT FILE NAME               : MAS1A<-MAS1A_2026-07-11_C_04.dat"
      - "INPUT FILE CREATION TIME (UTC): MAS1A<-2026-07-28 15:34:50 by operator"
      - "INPUT FILE SOFTWARE VERSION   : MAS1A<-V04.10.2020-11-09-77-gc5e91-dirty"
      - "INPUT FILE BUILDTIME TAG      : MAS1A<-06-21_17:10:48_UTC"
      - "INPUT FILE NAME               : CLK1B<-CLK1B_2026-07-11_C_04.dat"
      - "INPUT FILE CREATION TIME (UTC): CLK1B<-2026-07-28 03:36:34 by operator"
      - "INPUT FILE SOFTWARE VERSION   : CLK1B<-V04.10.2020-11-09-77-gc5e91-dirty"
      - "INPUT FILE BUILDTIME TAG      : CLK1B<-06-21_17:10:47_UTC"
      - "INPUT FILE NAME               : TIM1B<-TIM1B_2026-07-11_C_04.dat"
      - "INPUT FILE CREATION TIME (UTC): TIM1B<-2026-07-12 05:56:43 by operator"
      - "INPUT FILE SOFTWARE VERSION   : TIM1B<-V04.10.2020-11-09-77-gc5e91-dirty"
      - "INPUT FILE BUILDTIME TAG      : TIM1B<-06-21_17:10:44_UTC"
    id: 10.5067/GFJPL-L1B04
    institution: NASA/JPL
    instrument: Satellite and tank gas mass
    instrument_vocabulary: NASA Global Change Master Directory instrument keywords
    keywords: GRACE-FO, Satellite and tank gas mass
    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 C
    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: Satellite and tank gas mass data from GRACE C
    summary: Satellite and tank gas masses over time based on thruster usage and tank observations
    time_coverage_start: 2026-07-11T00:59:59.99
    time_coverage_stop: 2026-07-11T23:59:59.99
    title: GRACE-FO Level-1B Mass 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: 837003599.999004
    stop_time_epoch_secs: 837086399.997789
  variables:
    - time_intg:
        comment: 1st column
        coverage_content_type: referenceInformation
        long_name: Seconds past 12:00:00 noon of January 1, 2000 in GPS time
        units: seconds
    - time_frac:
        comment: 2nd column
        coverage_content_type: referenceInformation
        long_name: Fractional portion of time tag
        units: microseconds
        valid_range: 0, 999999
    - time_ref:
        comment: 3rd column
        coverage_content_type: referenceInformation
        long_name: Time reference frame
        units: char
        value_meanings:
          - R = Receiver, OBC, or LRI time
          - G = GPS time
    - GRACEFO_id:
        comment: 4th 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)
    - qualflg:
        comment: 5th column
        coverage_content_type: qualityInformation
        flag_masks: 1b, 2b, 4b, 8b, 16b, 32b, 64b, 128b
        flag_meanings:
          - bits 0-5 = Not defined
          - bit 6 = No OBC-to-Receiver Time mapping
          - bit 7 = No clock correction available
        long_name: Quality flags, bit 0 is rightmost
    - prod_flag:
        comment: 6th column
        coverage_content_type: referenceInformation
        flag_masks: 1b, 2b, 4b, 8b, 16b, 32b, 64b
        flag_meanings:
          - bit 0 = mass_thr
          - bit 1 = mass_thr_err
          - bit 2 = mass_tnk
          - bit 3 = mass_tnk_err
          - bit 4 = gas_mass_thr1
          - bit 5 = gas_mass_thr2
          - bit 6 = gas_mass_tnk1
          - bit 7 = gas_mass_tnk2
        long_name: Product flag, if bit set to 1, value is present in record, bit 0 is rightmost
    - mass_thr:
        comment: next column, if prod_flag bit set
        coverage_content_type: modelResult
        long_name: Spacecraft mass based on thruster usage
        units: kg
    - mass_thr_err:
        comment: next column, if prod_flag bit set
        coverage_content_type: qualityInformation
        long_name: Error in mass_thr (from 'error bit 0')
    - mass_tnk:
        comment: next column, if prod_flag bit set
        coverage_content_type: physicalMeasurement
        long_name: Spacecraft mass from tank observations
        units: kg
    - mass_tnk_err:
        comment: next column, if prod_flag bit set
        coverage_content_type: qualityInformation
        long_name: Error in mass_tnk (from 'error bit 2')
    - gas_mass_thr1:
        comment: next column, if prod_flag bit set
        coverage_content_type: modelResult
        long_name: Mass of gas in tank 1 based on thruster usage
        units: kg
    - gas_mass_thr2:
        comment: next column, if prod_flag bit set
        coverage_content_type: modelResult
        long_name: Mass of gas in tank 2 based on thruster usage
        units: kg
    - gas_mass_tnk1:
        comment: next column, if prod_flag bit set
        coverage_content_type: modelResult
        long_name: Mass of gas in tank 1 based on tank and thruster observations
        units: kg
    - gas_mass_tnk2:
        comment: next column, if prod_flag bit set
        coverage_content_type: modelResult
        long_name: Mass of gas in tank 2 based on tank and thruster observations
        units: kg
# End of YAML header
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837007199 998951 G C  00000000 11000000 12.84644630912809 12.95248789722443
837010799 998898 G C  00000000 11000000 12.84644630912809 12.95248789722443
837014399 998845 G C  00000000 11000000 12.84644630912809 12.95248789722444
837017999 998792 G C  00000000 11000000 12.8464463091281 12.95248789722445
837021599 998740 G C  00000000 11000000 12.84644630912809 12.95248789722445
837025199 998687 G C  00000000 11000000 12.84644630912809 12.95248789722446
837028799 998634 G C  00000000 11000000 12.84644630912809 12.95248789722446
837032399 998581 G C  00000000 11000000 12.84644630912809 12.95248789722445
837035999 998528 G C  00000000 11000000 12.84644630912809 12.95248789722446
837039599 998476 G C  00000000 11000000 12.84644630912808 12.95248789722445
837043199 998423 G C  00000000 11000000 12.84644630912808 12.95248789722444
837046799 998370 G C  00000000 11000000 12.84644630912809 12.95248789722444
837050399 998317 G C  00000000 11000000 12.84644630912809 12.95248789722444
837053999 998264 G C  00000000 11000000 12.84644630912808 12.95248789722444
837057599 998212 G C  00000000 11000000 12.84644630912808 12.95248789722445
837061199 998159 G C  00000000 11000000 12.84645021299695 12.95249189030915
837064799 998106 G C  00000000 11000000 12.84645021299694 12.95249189030914
837068399 998053 G C  00000000 11000000 12.84645021299693 12.95249189030914
837071999 998000 G C  00000000 11000000 12.84645021299694 12.95249189030913
837075599 997948 G C  00000000 11000000 12.84645021299694 12.95249189030914
837079199 997895 G C  00000000 11000000 12.84645021299694 12.95249189030915
837082799 997842 G C  00000000 11000000 12.84645021299694 12.95249189030915
837086399 997789 G C  00000000 11000000 12.84645355916388 12.9524953129479
