qtpa2ts
Registered User
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Posts: 7
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How do you read these? What does each line mean? Thanks for reading.
044
URNT15 KNHC 201749
AF303 1404A DEAN HDOB 21 20070820
173730 1805N 08313W 6964 02515 9251 +184 +158 039063 074 105 003 03
173800 1804N 08312W 6969 02491 9237 +180 +171 058040 045 051 006 03
173830 1803N 08310W 6964 02487 9990 +171 +999 064029 032 032 006 05
173900 1801N 08310W 6968 02474 9226 +174 +174 051014 019 031 007 05
173930 1800N 08308W 6967 02480 9990 +173 +999 287005 010 021 006 05
174000 1758N 08307W 6967 02487 9990 +169 +999 253019 027 032 006 01
174030 1757N 08305W 6969 02506 9990 +165 +999 240036 041 046 007 01
174100 1756N 08304W 6969 02537 9990 +159 +999 232057 063 063 009 01
174130 1755N 08302W 6960 02588 9990 +137 +999 224074 087 105 011 05
174200 1754N 08301W 6951 02648 9990 +112 +999 222105 109 999 999 05
174230 1753N 08301W 6977 02666 9990 +101 +999 225115 120 122 033 05
174300 1752N 08300W 6960 02747 9990 +095 +999 224118 123 113 037 01
174330 1751N 08259W 6975 02788 9990 +093 +999 221111 117 099 030 05
174400 1750N 08258W 6957 02847 9990 +083 +999 214107 109 096 014 05
174430 1749N 08257W 6968 02862 9990 +070 +999 213106 109 083 023 05
174500 1748N 08256W 6964 02895 9990 +080 +999 213100 101 077 020 05
174530 1747N 08255W 6967 02917 9990 +095 +999 211094 096 076 024 01
174600 1746N 08254W 6966 02936 9990 +098 +999 211087 090 071 009 01
174630 1745N 08253W 6963 02956 9990 +096 +999 209084 084 067 008 01
174700 1744N 08251W 6965 02969 9990 +091 +999 207082 083 065 008 01
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Clark
Meteorologist
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Posts: 1710
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There is a complete decoding tutorial at http://www.nhc.noaa.gov/abouthdobs_2007.shtml.
To give one quick example, using the first data line of your post...
173730 1805N 08313W 6964 02515 9251 +184 +158 039063 074 105 003 03
173730 -- 17:37:30 UTC, or 1:37:30p ET
1805N -- 18 degrees, 05 minutes N latitude
08313W -- 83 degrees, 13 minutes W longitude
6964 -- aircraft is at 694.4 mb
02515 -- 2515 meters is the height of the 694.4 mb surface/aircraft
9251 -- 925.1 mb is the extrapolated surface pressure
+184 -- 18.4C is the temperature outside the aircraft at that level
+158 -- 15.8C is the dewpoint outside the aircraft at that level
039063 -- the current winds outside the aircraft are from 039 degrees (NE) at 063 kt (these winds are 30 second average winds)
074 -- 74 kt maximum flight-level winds in the past 30 seconds
105 -- 105 kt maximum SFMR-derived surface winds in the past 30 seconds (these and the flight-level winds are 10 second average winds)
003 -- 3 mm/hr SFMR-derived rain rate, evaluated over a 10 second interval
03 -- quality control flag; the 0 suggests all positional variables are fine, the 3 suggests that the SFMR obs might be questionable
Anywhere you see all 9s indicates missing data.
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Current Tropical Model Output Plots
(or view them on the main page for any active Atlantic storms!)
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audienceofone
Verified CFHC User
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Posts: 19
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AF303 1404A DEAN HDOB 21 20070820
173730 1805N 08313W 6964 02515 9251 +184 +158 039063 074 105 003 03
AF303, 1404A, DEAN, HDOB, 21, 20070820
USAF aircraft # 303, on the 14th mission of tropical depression # 4 in the Atlantic, storm named DEAN, HDOB report, observation # 21, first line of HD/HA data recorded August 20, 2007
173730, 1805N, 08313W, 6964, 02515, 9251, +184, +158, 039063, 074, 105, 003, 03
observed at 5:37:30pm, lattitude 18.05 in the northern hemisphere, longitude 083.13 in the western hemisphere, aircraft static air pressure 696.4mb, aircraft geopotential height 2515m, extrapolated surface pressure 925.1mb, air temp 18.4C, dewpoint 15.8C, wind 039 degrees north at 063 kts, peak 10 second avg wind speed 74 kts, peak 10 second avg surface wind speed 105 kts, derived rain rate 30mm/hr, quality control indicates all parameters of nominal accuracy and SFMR parameters questionable
This is pretty standard to apply these same measurements to each line just changing the value. I'm sure you could google an explanation. Try checking out the website and the recon link. I'm sure they have something on there, although I haven't looked for anything like that in a long while.
Hope this helps. If you have any more questions just ask. And, mets, if I made any mistakes please let me know.
edit: Clark finished before I did. Sorry, I'm at work. His is much easier to understand so look at his instead. 
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"I can see from your zombie stare that you don't understand technical talk. Let me try it in a language I call, 'Liberal Arts Major.' It's blue."
2007 forecast as of 5-1-07, 16/9/5
Edited by audienceofone (Mon Aug 20 2007 03:27 PM)
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