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: 2026-07-14T22:49:31Z
    date_issued: 2026-07-23T13:12:47Z
    history:
      - "INPUT FILE NAME               : MAS1A<-MAS1A_2026-06-26_C_04.dat"
      - "INPUT FILE CREATION TIME (UTC): MAS1A<-2026-07-14 22:45:15 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_2026-06-26_C_04.dat"
      - "INPUT FILE CREATION TIME (UTC): CLK1B<-2026-07-04 00:29:44 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_2026-06-26_C_04.dat"
      - "INPUT FILE CREATION TIME (UTC): TIM1B<-2026-06-27 03:52:08 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: 2026-06-26T00:59:59.98
    time_coverage_stop: 2026-06-26T23:59:59.98
    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: 835707599.983145
    stop_time_epoch_secs: 835790399.9819289
  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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835711199 983092 G C  00000000 11000000 12.85201502657403 12.95708099983883
835714799 983039 G C  00000000 11000000 12.85201502657403 12.95708099983884
835718399 982986 G C  00000000 11000000 12.85201502657403 12.95708099983884
835721999 982933 G C  00000000 11000000 12.85201502657402 12.95708099983883
835725599 982881 G C  00000000 11000000 12.85201502657402 12.95708099983884
835729199 982828 G C  00000000 11000000 12.85201502657402 12.95708099983883
835732799 982775 G C  00000000 11000000 12.85201502657403 12.95708099983884
835736399 982722 G C  00000000 11000000 12.85201502657402 12.95708099983883
835739999 982669 G C  00000000 11000000 12.85201502657402 12.95708099983884
835743599 982616 G C  00000000 11000000 12.85201502657402 12.95708099983884
835747199 982563 G C  00000000 11000000 12.85201502657403 12.95708099983884
835750799 982511 G C  00000000 11000000 12.85201502657403 12.95708099983884
835754399 982458 G C  00000000 11000000 12.85201502657404 12.95708099983885
835757999 982405 G C  00000000 11000000 12.85201502657404 12.95708099983885
835761599 982352 G C  00000000 11000000 12.85201502657404 12.95708099983886
835765199 982299 G C  00000000 11000000 12.85201502657404 12.95708099983886
835768799 982246 G C  00000000 11000000 12.85201841163368 12.95708445466655
835772399 982194 G C  00000000 11000000 12.85201841163368 12.95708445466654
835775999 982141 G C  00000000 11000000 12.85201841163368 12.95708445466654
835779599 982088 G C  00000000 11000000 12.85201841163367 12.95708445466654
835783199 982035 G C  00000000 11000000 12.85201841163367 12.95708445466654
835786799 981982 G C  00000000 11000000 12.85201841163367 12.95708445466653
835790399 981929 G C  00000000 11000000 12.8520217966893 12.95708790949087
