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: 2026-06-16T14:47:04Z
    date_issued: 2026-06-24T17:30:58Z
    history:
      - "INPUT FILE NAME               : MAS1A<-MAS1A_2026-06-02_D_04.dat"
      - "INPUT FILE CREATION TIME (UTC): MAS1A<-2026-06-16 14:45:14 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_2026-06-02_D_04.dat"
      - "INPUT FILE CREATION TIME (UTC): CLK1B<-2026-06-11 00:26:38 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_2026-06-02_D_04.dat"
      - "INPUT FILE CREATION TIME (UTC): TIM1B<-2026-06-03 06:43:15 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 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: Satellite and tank gas mass data from GRACE D
    summary: Satellite and tank gas masses over time based on thruster usage and tank observations
    time_coverage_start: 2026-06-02T00:59:59.98
    time_coverage_stop: 2026-06-02T23:59:59.98
    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: 833633999.984899
    stop_time_epoch_secs: 833716799.9834
  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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833637599 984834 G D  00000000 11000000 12.77304487792824 13.27098783276934
833641199 984769 G D  00000000 11000000 12.77304487792823 13.27098783276934
833644799 984704 G D  00000000 11000000 12.77304487792823 13.27098783276935
833648399 984639 G D  00000000 11000000 12.77304487792824 13.27098783276934
833651999 984573 G D  00000000 11000000 12.77300035561997 13.27096190017366
833655599 984508 G D  00000000 11000000 12.77300035561998 13.27096190017368
833659199 984443 G D  00000000 11000000 12.77300035561999 13.27096190017369
833662799 984378 G D  00000000 11000000 12.77300035562 13.27096190017369
833666399 984313 G D  00000000 11000000 12.77300035562001 13.27096190017371
833669999 984248 G D  00000000 11000000 12.77300035562 13.2709619001737
833673599 984182 G D  00000000 11000000 12.77300035561999 13.27096190017369
833677199 984117 G D  00000000 11000000 12.77295583331017 13.2709359675773
833680799 984052 G D  00000000 11000000 12.77295583331017 13.2709359675773
833684399 983987 G D  00000000 11000000 12.77295583331016 13.27093596757729
833687999 983922 G D  00000000 11000000 12.77295583331015 13.27093596757729
833691599 983857 G D  00000000 11000000 12.77295583331014 13.27093596757728
833695199 983791 G D  00000000 11000000 12.77295583331012 13.27093596757727
833698799 983726 G D  00000000 11000000 12.77295583331013 13.27093596757727
833702399 983661 G D  00000000 11000000 12.77291131099878 13.2709100349802
833705999 983596 G D  00000000 11000000 12.77291131099877 13.27091003498019
833709599 983531 G D  00000000 11000000 12.77291131099878 13.27091003498019
833713199 983466 G D  00000000 11000000 12.77291131099877 13.27091003498017
833716799 983400 G D  00000000 11000000 12.77287420907195 13.2708884244823
