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AERMET PROCESSING VERIFICATION REPORT -- KHBG (BOBBY L CHAIN MUNI AIRPORT)
Period 2021-2025   |   Generated 2026-07-26 17:08:59
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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      KHBG  BOBBY L CHAIN MUNI AIRPORT, MS
   ICAO / WBAN / USAF   KHBG / 13833 / 747590
   GHCNh station ID     USW00013833
   Latitude, longitude  31.2700 N, 89.2560 W
   Elevation            44.7 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           140 km NNW of KHBG

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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     31.269444, -89.256111  (NAD83)
   Surface moisture     Average;  Arid: N
   Continuous snow      N
   Non-airport sectors  2
   Sectors              2
      sector 1: 131.0 to  311.0 degrees
      sector 2: 311.0 to  131.0 degrees

   Monthly surface characteristics applied by AERMET:

      Month  Sector   Albedo   Bowen ratio   Roughness z0 (m)
      -----  ------   ------   -----------   ----------------
          1       1     0.15          0.59              0.035
          2       1     0.14          0.46              0.043
          3       1     0.14          0.46              0.043
          4       1     0.14          0.46              0.043
          5       1     0.15          0.37              0.050
          6       1     0.15          0.37              0.050
          7       1     0.15          0.37              0.050
          8       1     0.15          0.37              0.050
          9       1     0.15          0.37              0.050
         10       1     0.15          0.59              0.044
         11       1     0.15          0.59              0.044
         12       1     0.15          0.59              0.044
          1       2     0.15          0.59              0.107
          2       2     0.14          0.46              0.134
          3       2     0.14          0.46              0.134
          4       2     0.14          0.46              0.134
          5       2     0.15          0.37              0.164
          6       2     0.15          0.37              0.164
          7       2     0.15          0.37              0.164
          8       2     0.15          0.37              0.164
          9       2     0.15          0.37              0.164
         10       2     0.15          0.59              0.146
         11       2     0.15          0.59              0.146
         12       2     0.15          0.59              0.146

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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            60356
   Rejected, NCEI suspect/erroneous 171
   Rejected, METAR cross-check      0
   Full detail                      KHBG_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 8783 | 1-min ASOS hrs 8784
      Calms 183 | Variable winds 16 | Cloud subs 10 | Temp subs 2
      Errors 0 | Warnings 359
   Year 2022
      Upper air soundings 774 | Surface obs 8783 | 1-min ASOS hrs 8784
      Calms 49 | Variable winds 1 | Cloud subs 11 | Temp subs 2
      Errors 0 | Warnings 356
   Year 2023
      Upper air soundings 758 | Surface obs 8744 | 1-min ASOS hrs 8784
      Calms 380 | Variable winds 40 | Cloud subs 48 | Temp subs 21
      Errors 0 | Warnings 358
   Year 2024
      Upper air soundings 754 | Surface obs 8785 | 1-min ASOS hrs 8808
      Calms 528 | Variable winds 43 | Cloud subs 90 | Temp subs 23
      Errors 0 | Warnings 357
   Year 2025
      Upper air soundings 738 | Surface obs 8636 | 1-min ASOS hrs 8760
      Calms 637 | Variable winds 69 | Cloud subs 28 | Temp subs 24
      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    99.9%    99.5%   100.0%    99.8%      99.8%   PASS
      2022   100.0%    99.8%    99.1%    99.8%      99.7%   PASS
      2023    99.5%    98.8%    98.0%    99.7%      99.0%   PASS
      2024   100.0%    99.6%    99.2%    98.9%      99.4%   PASS
      2025    97.1%    99.0%    93.2%    99.6%      97.2%   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     10.7 m/s    -7.8 C    35.0 C           0                0
      2022     12.4 m/s    -7.8 C    38.2 C           0                0
      2023     10.6 m/s    -2.2 C    41.1 C           0                0
      2024     11.8 m/s    -9.3 C    37.8 C           0                0
      2025     13.2 m/s   -10.6 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        183            19        8741
      2022         49            28        8732
      2023        380            87        8673
      2024        523            52        8732
      2025        637           244        8516

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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
      --------------------   ---------   -----   --------------------------------
      KHBG2021.sfc                1.47    8784   6d5aeb1a822a7ecdbe883cb86a99e107
      KHBG2021.pfl                0.57       -   3a01120ac478f792fb325c24ec17c3b2
      KHBG2021US.sfc              1.47    8784   c05422fbb5f6ff7444fc37d249f51cf9
      KHBG2021US.pfl              0.57       -   3a01120ac478f792fb325c24ec17c3b2
      KHBG2022.sfc                1.47    8784   3f88f1ac2b1fac44d4cec74e3c37531a
      KHBG2022.pfl                0.57       -   b9a6bd97239a20ce4572eeaada348687
      KHBG2022US.sfc              1.47    8784   4e7e39d692849074267bd980d4b346b1
      KHBG2022US.pfl              0.57       -   b9a6bd97239a20ce4572eeaada348687
      KHBG2023.sfc                1.47    8784   2b22ef85adcd73f93f468b6f9b02f793
      KHBG2023.pfl                0.57       -   6fed10bed6d7c1a9cf72c6f14273b066
      KHBG2023US.sfc              1.47    8784   8e464aafe73ece399674000e9fd89f12
      KHBG2023US.pfl              0.57       -   6fed10bed6d7c1a9cf72c6f14273b066
      KHBG2024.sfc                1.48    8808   1721a32fdce6261117218cd6d29fac42
      KHBG2024.pfl                0.57       -   b838ec09397fd64bfc62acc265c62edc
      KHBG2024US.sfc              1.48    8808   e5f293a003986c633ff6709635fbe89f
      KHBG2024US.pfl              0.57       -   b838ec09397fd64bfc62acc265c62edc
      KHBG2025.sfc                1.47    8784   cfebedf0204f54fba8e3a0f7c602edc1
      KHBG2025.pfl                0.57       -   6f198260520f9c75c1eaf7b84c46d4f5
      KHBG2025US.sfc              1.47    8784   5e8efef68b3269ba226b5aef07e2b842
      KHBG2025US.pfl              0.57       -   6f198260520f9c75c1eaf7b84c46d4f5

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End of report -- KHBG 2021-2025
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