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: 2026-10-20T05:22:57Z
    date_issued: 2026-10-28T01:57:35Z
    history:
      - "INPUT FILE NAME               : MAS1A<-MAS1A_2026-10-02_C_04.dat"
      - "INPUT FILE CREATION TIME (UTC): MAS1A<-2026-10-20 05:22:36 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_2026-10-02_C_04.dat"
      - "INPUT FILE CREATION TIME (UTC): CLK1B<-2026-10-12 17:49:27 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_2026-10-02_C_04.dat"
      - "INPUT FILE CREATION TIME (UTC): TIM1B<-2026-10-03 13:02:34 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: 2026-10-02T00:59:59.99
    time_coverage_stop: 2026-10-02T23:59:59.99
    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: 844174799.997955
    stop_time_epoch_secs: 844257599.996747
  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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844178399 997903 G C  00000000 11000000 12.69121324407685 12.80410325728278
844181999 997850 G C  00000000 11000000 12.69121324407685 12.80410325728278
844185599 997797 G C  00000000 11000000 12.69121324407685 12.80410325728277
844189199 997745 G C  00000000 11000000 12.69121324407685 12.80410325728276
844192799 997692 G C  00000000 11000000 12.69121324407686 12.80410325728277
844196399 997640 G C  00000000 11000000 12.69121324407685 12.80410325728277
844199999 997587 G C  00000000 11000000 12.69121324407685 12.80410325728277
844203599 997535 G C  00000000 11000000 12.69121324407685 12.80410325728277
844207199 997482 G C  00000000 11000000 12.69121324407685 12.80410325728277
844210799 997430 G C  00000000 11000000 12.69121324407686 12.80410325728277
844214399 997377 G C  00000000 11000000 12.69121324407687 12.80410325728278
844217999 997325 G C  00000000 11000000 12.69121324407686 12.80410325728277
844221599 997272 G C  00000000 11000000 12.69121324407687 12.80410325728278
844225199 997219 G C  00000000 11000000 12.69121324407686 12.80410325728279
844228799 997167 G C  00000000 11000000 12.69121324407685 12.80410325728278
844232399 997114 G C  00000000 11000000 12.69121324407685 12.80410325728278
844235999 997062 G C  00000000 11000000 12.69121324407684 12.80410325728278
844239599 997009 G C  00000000 11000000 12.69121324407685 12.80410325728278
844243199 996957 G C  00000000 11000000 12.69121324407684 12.80410325728278
844246799 996904 G C  00000000 11000000 12.69121324407684 12.80410325728278
844250399 996852 G C  00000000 11000000 12.69121324407684 12.80410325728279
844253999 996799 G C  00000000 11000000 12.69121324407683 12.80410325728278
844257599 996747 G C  00000000 11000000 12.69121905087919 12.80410899218344
