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: 2026-04-13T18:03:15Z
    date_issued: 2026-04-20T15:34:14Z
    history:
      - "INPUT FILE NAME               : MAS1A<-MAS1A_2026-04-01_C_04.dat"
      - "INPUT FILE CREATION TIME (UTC): MAS1A<-2026-04-13 16:40:14 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_2026-04-01_C_04.dat"
      - "INPUT FILE CREATION TIME (UTC): CLK1B<-2026-04-13 17:58:18 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_2026-04-01_C_04.dat"
      - "INPUT FILE CREATION TIME (UTC): TIM1B<-2026-04-02 06:30:33 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: 2026-04-01T00:59:59.99
    time_coverage_stop: 2026-04-01T23:59:59.99
    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: 828277199.993739
    stop_time_epoch_secs: 828359999.9925179
  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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828280799 993686 G C  00000000 11000000 12.89008262420625 12.98824177863178
828284399 993633 G C  00000000 11000000 12.89008262420625 12.98824177863177
828287999 993580 G C  00000000 11000000 12.89008262420624 12.98824177863177
828291599 993527 G C  00000000 11000000 12.89008262420624 12.98824177863176
828295199 993474 G C  00000000 11000000 12.89008262420625 12.98824177863177
828298799 993421 G C  00000000 11000000 12.89008262420626 12.98824177863177
828302399 993368 G C  00000000 11000000 12.89008262420626 12.98824177863178
828305999 993315 G C  00000000 11000000 12.89008262420626 12.98824177863177
828309599 993261 G C  00000000 11000000 12.89008262420625 12.98824177863177
828313199 993208 G C  00000000 11000000 12.89008262420625 12.98824177863177
828316799 993155 G C  00000000 11000000 12.89008361402724 12.98824316403348
828320399 993102 G C  00000000 11000000 12.89008361402724 12.98824316403347
828323999 993049 G C  00000000 11000000 12.89008460384765 12.98824454943469
828327599 992996 G C  00000000 11000000 12.89008460384765 12.98824454943469
828331199 992943 G C  00000000 11000000 12.89008460384765 12.98824454943468
828334799 992890 G C  00000000 11000000 12.89008460384766 12.98824454943468
828338399 992837 G C  00000000 11000000 12.89008460384766 12.98824454943468
828341999 992783 G C  00000000 11000000 12.89008559366672 12.98824593483474
828345599 992730 G C  00000000 11000000 12.89008559366673 12.98824593483474
828349199 992677 G C  00000000 11000000 12.89008559366674 12.98824593483474
828352799 992624 G C  00000000 11000000 12.89008559366673 12.98824593483472
828356399 992571 G C  00000000 11000000 12.89008658348476 12.98824732023392
828359999 992518 G C  00000000 11000000 12.89008658348476 12.98824732023393
