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: 2026-10-06T16:18:24Z
    date_issued: 2026-10-09T00:09:29Z
    history:
      - "INPUT FILE NAME               : MAS1A<-MAS1A_2026-09-21_D_04.dat"
      - "INPUT FILE CREATION TIME (UTC): MAS1A<-2026-10-06 16:17:43 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_2026-09-21_D_04.dat"
      - "INPUT FILE CREATION TIME (UTC): CLK1B<-2026-10-05 23:47:47 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_2026-09-21_D_04.dat"
      - "INPUT FILE CREATION TIME (UTC): TIM1B<-2026-09-22 05:35:26 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: 2026-09-21T00:59:59.99
    time_coverage_stop: 2026-09-21T23:59:59.99
    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: 843224399.996188
    stop_time_epoch_secs: 843307199.994674
  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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843227999 996122 G D  00000000 11000000 11.82531316995508 12.39463425949388
843231599 996057 G D  00000000 11000000 11.82531316995509 12.3946342594939
843235199 995991 G D  00000000 11000000 11.82531316995508 12.39463425949389
843238799 995925 G D  00000000 11000000 11.82531316995506 12.39463425949387
843242399 995859 G D  00000000 11000000 11.82526446470978 12.3946047660349
843245999 995793 G D  00000000 11000000 11.82526446470978 12.39460476603491
843249599 995727 G D  00000000 11000000 11.82526446470978 12.39460476603491
843253199 995661 G D  00000000 11000000 11.82521575946451 12.39457527257604
843256799 995596 G D  00000000 11000000 11.8252157594645 12.39457527257605
843260399 995530 G D  00000000 11000000 11.82521575946448 12.39457527257605
843263999 995464 G D  00000000 11000000 11.82516705421928 12.39454577911723
843267599 995398 G D  00000000 11000000 11.82516705421927 12.39454577911722
843271199 995332 G D  00000000 11000000 11.82516705421928 12.39454577911722
843274799 995266 G D  00000000 11000000 11.82516705421929 12.39454577911721
843278399 995200 G D  00000000 11000000 11.82511834897418 12.39451628565852
843281999 995135 G D  00000000 11000000 11.82511834897419 12.39451628565852
843285599 995069 G D  00000000 11000000 11.82511834897418 12.39451628565851
843289199 995003 G D  00000000 11000000 11.82511834897417 12.39451628565849
843292799 994937 G D  00000000 11000000 11.82506964372909 12.39448679219991
843296399 994871 G D  00000000 11000000 11.8250696437291 12.39448679219989
843299999 994805 G D  00000000 11000000 11.82506964372909 12.3944867921999
843303599 994740 G D  00000000 11000000 11.8250696437291 12.3944867921999
843307199 994674 G D  00000000 11000000 11.82502093848412 12.39445729874143
