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AERMET PROCESSING VERIFICATION REPORT -- KJAN (JACKSON INTERNATIONAL AIRPORT)
Period 2021-2025   |   Generated 2026-07-26 17:12:23
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OVERALL RESULT: PROCESSED SUCCESSFULLY -- ALL QUARTERS MEET THE EPA CRITERION

   Processing              PASS
      AERMET errors                    : 0
      Non-physical values in .sfc      : 0
   Data completeness       PASS
      Quarters meeting EPA 90% criterion: 20 of 20

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1. STATION
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   Surface station      KJAN  JACKSON INTERNATIONAL AIRPORT, MS
   ICAO / WBAN / USAF   KJAN / 03940 / 722350
   GHCNh station ID     USW00003940
   Latitude, longitude  32.3200 N, 90.0780 W
   Elevation            90.2 m MSL
   Wind reference ht    10.0 m   (AERMOD .sfc column 18)
   Temp reference ht    2.0 m   (AERMOD .sfc column 20)

   Upper air station    USM00072235  JACKSON/ALLEN C. THOMPSON FIE
   Latitude, longitude  32.3189 N, 90.0800 W
   Elevation            90.7 m MSL
   Separation           0 km WSW of KJAN

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2. SOFTWARE AND INPUT DATA
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   AERMET               26135
   AERMINUTE            26135
   AERSURFACE           26135
   Surface data         NCEI GHCNh hourly (replaces the discontinued ISHD)
   1-minute winds       NCEI ASOS 1-minute and 5-minute, hourly-averaged by
                        AERMINUTE and merged by AERMET
   Upper air            NCEI IGRA v2 radiosonde soundings

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3. SURFACE CHARACTERISTICS (AERSURFACE)
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   Land cover           NLCD 2021 (with impervious and canopy)
   Roughness method     ZORAD, 1000.0 m radius, monthly resolution
   Site coordinates     32.319722, -90.077778  (NAD83)
   Surface moisture     Average;  Arid: N
   Continuous snow      N
   Non-airport sectors  None
   Sectors              1
      sector 1:   0.0 to  360.0 degrees

   Monthly surface characteristics applied by AERMET:

      Month  Sector   Albedo   Bowen ratio   Roughness z0 (m)
      -----  ------   ------   -----------   ----------------
          1       1     0.16          0.61              0.022
          2       1     0.15          0.46              0.029
          3       1     0.15          0.46              0.029
          4       1     0.15          0.46              0.029
          5       1     0.16          0.46              0.036
          6       1     0.16          0.46              0.036
          7       1     0.16          0.46              0.036
          8       1     0.16          0.46              0.036
          9       1     0.16          0.46              0.036
         10       1     0.16          0.61              0.030
         11       1     0.16          0.61              0.030
         12       1     0.16          0.61              0.022

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4. SURFACE DATA QUALITY CONTROL
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   NCEI flags each observation with a quality code that AERMET does not act
   on, so the GHCNh file is screened before processing.  Rejected values are
   blanked (treated as missing); no record is dropped and no value is altered.

   Observations screened            71928
   Rejected, NCEI suspect/erroneous 97
   Rejected, METAR cross-check      0
   Full detail                      KJAN_GHCNh_2021_2025_qc_log.txt

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5. ANNUAL PROCESSING STATISTICS (from AERMET .RP2)
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   Year 2021
      Upper air soundings 743 | Surface obs 8784 | 1-min ASOS hrs 8784
      Calms 106 | Variable winds 9 | Cloud subs 4 | Temp subs 1
      Errors 0 | Warnings 359
   Year 2022
      Upper air soundings 774 | Surface obs 8784 | 1-min ASOS hrs 8784
      Calms 24 | Variable winds 3 | Cloud subs 0 | Temp subs 0
      Errors 0 | Warnings 356
   Year 2023
      Upper air soundings 758 | Surface obs 8784 | 1-min ASOS hrs 8784
      Calms 210 | Variable winds 34 | Cloud subs 1 | Temp subs 0
      Errors 0 | Warnings 358
   Year 2024
      Upper air soundings 754 | Surface obs 8801 | 1-min ASOS hrs 8808
      Calms 486 | Variable winds 41 | Cloud subs 5 | Temp subs 5
      Errors 0 | Warnings 357
   Year 2025
      Upper air soundings 738 | Surface obs 8636 | 1-min ASOS hrs 8760
      Calms 535 | Variable winds 56 | Cloud subs 20 | Temp subs 21
      Errors 0 | Warnings 356

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6. DATA COMPLETENESS
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   EPA requires at least 90% valid data per calendar quarter.  The quarterly
   columns are the compliance test; the annual column is informational.

      Year       Q1       Q2       Q3       Q4     Annual   Result
      ----   ------   ------   ------   ------   --------   ------
      2021   100.0%    99.6%    99.7%   100.0%      99.8%   PASS
      2022    99.9%   100.0%   100.0%   100.0%     100.0%   PASS
      2023    99.9%    99.1%    99.6%    99.9%      99.6%   PASS
      2024   100.0%    99.8%    99.3%    98.7%      99.4%   PASS
      2025    99.2%    99.7%    94.7%    98.8%      98.1%   PASS

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7. PHYSICAL PLAUSIBILITY OF THE DELIVERED FILES
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   Screening of the .sfc files as delivered.  Wind speeds above 25 m/s and
   temperatures outside -25 to +45 C are reported for review; a non-zero count
   does not by itself mean the data are wrong, but each should be explainable.

      Year   Max wind   Min temp   Max temp   ws>25 m/s   T out of range
      ----   --------   --------   --------   ---------   --------------
      2021      9.6 m/s   -10.0 C    35.7 C           0                0
      2022     12.9 m/s   -10.6 C    36.7 C           0                0
      2023     13.7 m/s    -3.3 C    41.1 C           0                0
      2024     12.1 m/s   -11.8 C    37.2 C           0                0
      2025     14.2 m/s   -10.0 C    37.2 C           0                0

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8. CALMS AND MISSING DATA
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   AERMOD excludes calm hours (wind speed below the 0.5 m/s threshold) and
   missing hours from the averaging period, and reports both in its own output.
   They are counted here so the modeller can anticipate them.

      Year   Calm hrs   Missing hrs   Valid hrs
      ----   --------   -----------   ---------
      2021        106            16        8744
      2022         24             3        8757
      2023        210            34        8726
      2024        485            49        8735
      2025        535           167        8593

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9. OUTPUT FILES
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   Files without the US suffix were processed WITHOUT the ADJ_U* option; files
   with the US suffix were processed with METHOD STABLEBL ADJ_U*.  Use one set
   or the other consistently -- do not mix them within a single AERMOD run.

      File                    Size (MB)   Hours   MD5
      --------------------   ---------   -----   --------------------------------
      KJAN2021.sfc                1.47    8784   295c59f74ff5f9696b8b5870efc1a653
      KJAN2021.pfl                0.57       -   fc798312464e02c73da24a600f473076
      KJAN2021US.sfc              1.47    8784   6110509bfa97627581e5739c4aa350b0
      KJAN2021US.pfl              0.57       -   fc798312464e02c73da24a600f473076
      KJAN2022.sfc                1.47    8784   338e25d244062fbb4f525a69746ac9c6
      KJAN2022.pfl                0.57       -   d1ef15dd5ad4207cf85266343b54d34f
      KJAN2022US.sfc              1.47    8784   243764cda7834267b1fcfa81f1a11471
      KJAN2022US.pfl              0.57       -   d1ef15dd5ad4207cf85266343b54d34f
      KJAN2023.sfc                1.47    8784   0063fb0504cdf16819999d27c3bafadc
      KJAN2023.pfl                0.57       -   2d0f9125775d6dfc07ea918973863a56
      KJAN2023US.sfc              1.47    8784   0f57d25a28e3c720ab39b814c92cce94
      KJAN2023US.pfl              0.57       -   2d0f9125775d6dfc07ea918973863a56
      KJAN2024.sfc                1.48    8808   c2822c0c732657b49bedf7e1238153ac
      KJAN2024.pfl                0.57       -   53062db7a15663bf24ad6c318cc7fec4
      KJAN2024US.sfc              1.48    8808   fb0519369a743fca562c4bc06d809f88
      KJAN2024US.pfl              0.57       -   53062db7a15663bf24ad6c318cc7fec4
      KJAN2025.sfc                1.47    8784   ea9550840c5db95a457d43728b111ef7
      KJAN2025.pfl                0.57       -   8c38243d5c49bc6765731d1759c5fb69
      KJAN2025US.sfc              1.47    8784   623c9347565510faf15b80046db0bf99
      KJAN2025US.pfl              0.57       -   8c38243d5c49bc6765731d1759c5fb69

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End of report -- KJAN 2021-2025
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