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: 2026-04-06T17:10:21Z
    date_issued: 2026-04-13T21:18:43Z
    history:
      - "INPUT FILE NAME               : MAS1A<-MAS1A_2026-03-21_D_04.dat"
      - "INPUT FILE CREATION TIME (UTC): MAS1A<-2026-04-06 17:06:58 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_2026-03-21_D_04.dat"
      - "INPUT FILE CREATION TIME (UTC): CLK1B<-2026-04-02 23:42:32 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_2026-03-21_D_04.dat"
      - "INPUT FILE CREATION TIME (UTC): TIM1B<-2026-03-22 06:25:05 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: 2026-03-21T00:59:59.98
    time_coverage_stop: 2026-03-21T23:59:59.98
    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: 827326799.988012
    stop_time_epoch_secs: 827409599.986523
  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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827330399 987947 G D  00000000 11000000 12.80601140446644 13.28853059843635
827333999 987882 G D  00000000 11000000 12.80601140446644 13.28853059843635
827337599 987817 G D  00000000 11000000 12.80601140446645 13.28853059843635
827341199 987753 G D  00000000 11000000 12.80596843483734 13.28850539194601
827344799 987688 G D  00000000 11000000 12.80596843483735 13.28850539194602
827348399 987623 G D  00000000 11000000 12.80596843483734 13.288505391946
827351999 987558 G D  00000000 11000000 12.80592546520748 13.28848018545529
827355599 987494 G D  00000000 11000000 12.80592546520749 13.28848018545531
827359199 987429 G D  00000000 11000000 12.80592546520749 13.28848018545531
827362799 987364 G D  00000000 11000000 12.80588249557691 13.28845497896425
827366399 987300 G D  00000000 11000000 12.80588249557692 13.28845497896426
827369999 987235 G D  00000000 11000000 12.80588249557691 13.28845497896426
827373599 987170 G D  00000000 11000000 12.8058395259456 13.28842977247282
827377199 987105 G D  00000000 11000000 12.8058395259456 13.28842977247282
827380799 987041 G D  00000000 11000000 12.80583952594558 13.28842977247281
827384399 986976 G D  00000000 11000000 12.80579655631359 13.28840456598105
827387999 986911 G D  00000000 11000000 12.80579655631358 13.28840456598105
827391599 986847 G D  00000000 11000000 12.80571061704865 13.28835415299705
827395199 986782 G D  00000000 11000000 12.80571061704865 13.28835415299704
827398799 986717 G D  00000000 11000000 12.80566764741573 13.28832894650483
827402399 986652 G D  00000000 11000000 12.80566764741574 13.28832894650483
827405999 986588 G D  00000000 11000000 12.80562467778239 13.28830374001241
827409599 986523 G D  00000000 11000000 12.80562467778239 13.2883037400124
