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AERMET PROCESSING VERIFICATION REPORT -- KGTR (GOLDEN TRIANGLE RGNL APT)
Period 2021-2025   |   Generated 2026-07-26 17:06:31
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OVERALL RESULT: PROCESSED SUCCESSFULLY -- SOME QUARTERS BELOW THE EPA CRITERION

   Processing              PASS
      AERMET errors                    : 0
      Non-physical values in .sfc      : 0
   Data completeness       SEE NOTE
      Quarters meeting EPA 90% criterion: 17 of 20

   Note: 3 quarter(s) fall below the 90% criterion.  This reflects gaps in
   the source observation archive, not an error in processing.  Review those
   periods when selecting a station and period for a regulatory application and
   consider substitute years, consistent with Appendix W and regional guidance.

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1. STATION
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   Surface station      KGTR  GOLDEN TRIANGLE RGNL APT, MS
   ICAO / WBAN / USAF   KGTR / 53893 / 723307
   GHCNh station ID     USW00053893
   Latitude, longitude  33.4500 N, 88.5830 W
   Elevation            80.5 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           188 km SW of KGTR

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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     33.450000, -88.583333  (NAD83)
   Surface moisture     Average;  Arid: N
   Continuous snow      N
   Non-airport sectors  2
   Sectors              2
      sector 1: 210.0 to  330.0 degrees
      sector 2: 330.0 to  210.0 degrees

   Monthly surface characteristics applied by AERMET:

      Month  Sector   Albedo   Bowen ratio   Roughness z0 (m)
      -----  ------   ------   -----------   ----------------
          1       1     0.17          0.58              0.021
          2       1     0.14          0.33              0.027
          3       1     0.14          0.33              0.027
          4       1     0.14          0.33              0.027
          5       1     0.18          0.41              0.033
          6       1     0.18          0.41              0.033
          7       1     0.18          0.41              0.033
          8       1     0.18          0.41              0.033
          9       1     0.18          0.41              0.033
         10       1     0.18          0.58              0.027
         11       1     0.18          0.58              0.027
         12       1     0.17          0.58              0.021
          1       2     0.17          0.58              0.135
          2       2     0.14          0.33              0.161
          3       2     0.14          0.33              0.161
          4       2     0.14          0.33              0.161
          5       2     0.18          0.41              0.215
          6       2     0.18          0.41              0.215
          7       2     0.18          0.41              0.215
          8       2     0.18          0.41              0.215
          9       2     0.18          0.41              0.215
         10       2     0.18          0.58              0.198
         11       2     0.18          0.58              0.198
         12       2     0.17          0.58              0.135

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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            55666
   Rejected, NCEI suspect/erroneous 59
   Rejected, METAR cross-check      0
   Full detail                      KGTR_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 8681 | 1-min ASOS hrs 0
      Calms 1384 | Variable winds 235 | Cloud subs 24 | Temp subs 2
      Errors 0 | Warnings 360
   Year 2022
      Upper air soundings 774 | Surface obs 8620 | 1-min ASOS hrs 0
      Calms 1389 | Variable winds 325 | Cloud subs 19 | Temp subs 3
      Errors 0 | Warnings 357
   Year 2023
      Upper air soundings 758 | Surface obs 8624 | 1-min ASOS hrs 0
      Calms 1430 | Variable winds 353 | Cloud subs 30 | Temp subs 9
      Errors 0 | Warnings 359
   Year 2024
      Upper air soundings 754 | Surface obs 8604 | 1-min ASOS hrs 0
      Calms 1405 | Variable winds 311 | Cloud subs 28 | Temp subs 5
      Errors 0 | Warnings 360
   Year 2025
      Upper air soundings 738 | Surface obs 8615 | 1-min ASOS hrs 0
      Calms 1462 | Variable winds 303 | Cloud subs 17 | Temp subs 2
      Errors 0 | Warnings 357

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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    96.9%    95.9%    94.2%    97.2%      96.0%   PASS
      2022    96.1%    92.7%    91.4%    96.1%      94.1%   PASS
      2023    97.0%    89.4%    92.0%    94.9%      93.3%   FAIL
      2024    96.6%    93.5%    89.3%    96.8%      94.0%   FAIL
      2025    98.1%    95.2%    89.8%    96.4%      94.8%   FAIL

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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     10.8 m/s   -12.2 C    35.7 C           0                0
      2022     13.9 m/s   -14.3 C    37.2 C           0                0
      2023     11.8 m/s    -5.6 C    38.2 C           0                0
      2024     14.4 m/s   -13.9 C    38.2 C           0                0
      2025     14.9 m/s   -13.3 C    37.8 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       1384           347        8413
      2022       1389           521        8239
      2023       1430           586        8174
      2024       1405           524        8260
      2025       1462           452        8308

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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
      --------------------   ---------   -----   --------------------------------
      KGTR2021.sfc                1.47    8784   779800c6cf3c2b29ef31173268ba262a
      KGTR2021.pfl                0.57       -   7103f3ef543fad222836d119774fd1fb
      KGTR2021US.sfc              1.47    8784   b39808333390020ba9e341ab61452aa1
      KGTR2021US.pfl              0.57       -   7103f3ef543fad222836d119774fd1fb
      KGTR2022.sfc                1.47    8784   0f88f86f79c1c2849cae21eb2f249724
      KGTR2022.pfl                0.57       -   d6e0d05d736e48acc1cbcbf9f6487fa9
      KGTR2022US.sfc              1.47    8784   389ce4ff7731a93d762bdefc03392646
      KGTR2022US.pfl              0.57       -   d6e0d05d736e48acc1cbcbf9f6487fa9
      KGTR2023.sfc                1.47    8784   a60783159866b5ded44cb3f7b251e00e
      KGTR2023.pfl                0.57       -   40eef705820a31a28c95569b17ef2d3f
      KGTR2023US.sfc              1.47    8784   55402041e469641c8716f64d8ec4c13c
      KGTR2023US.pfl              0.57       -   40eef705820a31a28c95569b17ef2d3f
      KGTR2024.sfc                1.48    8808   1122cf530e4f7f50b866b6ecc9ad0bb3
      KGTR2024.pfl                0.57       -   5efab62d965b40cc149f9f68bb28a246
      KGTR2024US.sfc              1.48    8808   34a396c44e5047b551d75932c8ba4b3d
      KGTR2024US.pfl              0.57       -   5efab62d965b40cc149f9f68bb28a246
      KGTR2025.sfc                1.47    8784   2fbafaf61a60b6310141ae24449ca71e
      KGTR2025.pfl                0.57       -   37caa1e4f63572cf29699c803c23da74
      KGTR2025US.sfc              1.47    8784   c7a87380bb5af3480a6952029e136bb8
      KGTR2025US.pfl              0.57       -   37caa1e4f63572cf29699c803c23da74

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End of report -- KGTR 2021-2025
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