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JIM HERRON, MSgt, USAF |
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TECHNIQUE DEVELOPMENT NCO |
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TOPIC: SATELLITE FIX ERRORS |
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COMMON ERRORS |
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PROCEDURES |
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TECHNIQUES |
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SOLUTIONS |
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Check Sums |
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Data T calculations |
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Trend Analysis |
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Final-T |
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Fix Codes |
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Enter the appropriate trend indicator |
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--D, W, or S |
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--D+ or W+ |
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--D- or W- |
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Change > 1.5
(+) |
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Change 0.5 (-) and 1.0 ( ) |
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No change |
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Use visible data before infrared |
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Use DATA-T when features are clear cut |
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Use PATTERN-T when DATA-T is not clear cut. |
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Use MODEL-T When DATA-T and PATTERN-T both are
not representative. |
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RULES: --Initial Dvorak must be T1.0 or T1.5 |
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-- CI = T-no. except when the T no. shows a
change to a weakening trend. |
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-- For initial weakening, hold CI the same for
12 hours, then hold CI .5 or 1.0 higher than the T no. as the storm weakens
(usually .5 higher). |
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-- |
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Animation |
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--A is suffixed if animation has been used |
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Sensor/Technique codes |
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--Know which codes go with the different sensor
types |
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Always compare satellite imagery from 24 hours
previous |
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Look at the images and get a “feel” for how the
storm is progressing: DEVELOPED, WEAKENED, or STEADY |
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Take appropriate actions when storm intensity
does not match the true trend |
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Quality Control Program |
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Dvorak after-the-fact check list |
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Quality Control Program assists management in
detecting trends and training deficiencies. |
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Customers products looked at |
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Dvorak after-the-fact check list |
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On coming shifts re-check previous shift |
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Once every twelve hours |
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ITEMS: |
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Intensity |
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Location |
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Trend |
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Form entries |
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Management will explain or clarify any
discrepancies |
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DOUBLE CHECK SATELLITE FIXES |
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PUBLISH FINDINGS |
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VISUAL AIDS |
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Notes