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TD6201 -
UPPER AIR DATA FOR AERMOD |
A) FORMAT (VARIABLE RECORD)
The first seven fields constitute the ID
PORTION, and occur at the beginning of each record. The next ten fields of
the record contain the DATA PORTION. The DATA PORTION is repeated for each
level in the observation. The maximum number of levels is 200.
Each logical record is of variable length
with a maximum of 7232 characters. Each logical record contains a
station's complete Upper Air Observation for a specific release time. The
form of a record is:
ID PORTION (32 characters) Fixed Length
| STATION
ID |
LAT |
LAT CODE |
LONG |
LONG
CODE |
TIME/DATE |
NUMBER
VALUES |
| XXXXXXXX |
XXXX |
X |
XXXXX |
X |
XXXXXXXXXX |
XXX |
| 001 |
002 |
003 |
004 |
005 |
006 |
007 |
DATA
PORTION (36 Characters) repeated Number-Values Times
| LVL-QLTY
INDCTR |
TIME |
PRESSURE |
HEIGHT |
TEMP |
RH |
WIND
DIR |
WIND
SPD |
| X |
XXXX |
XXXXX |
XXXXXX |
XXXX |
XXX |
XXX |
XXX |
|
008 |
009 |
010 |
011 |
012 |
013 |
014 |
015 |
|
QUALITY
FLAGS |
TYPE
OF LEVEL |
| XXXXXX |
X |
| 016 |
017 |
| TAPE
FIELD |
TAPE RECORD POSITION |
ELEMENT
DESCRIPTION |
| 001 |
001-008 |
STATION
IDENTIFICATION |
| 002 |
009-012 |
LATITUDE |
| 003 |
013 |
LATITUDE
CODE N/S |
| 004 |
014-018 |
LONGITUDE |
| 005 |
019 |
LONGITUDE
CODE E/W |
| 006 |
020-029 |
DATE
AND TIME (YR/MO/DY/HR) |
| 007 |
030-032 |
NUMBER
OF DATA PORTION GROUPS THAT FOLLOW |
| 008 |
033 |
LEVEL
QUALITY INDICATOR |
| 009 |
034-037 |
TIME
(ELAPSED TIME SINCE RELEASE) |
| 010 |
038-042 |
PRESSURE |
| 011 |
043-048 |
HEIGHT |
| 012 |
049-052 |
TEMPERATURE |
| 013 |
053-055 |
RELATIVE
HUMIDITY |
| 014 |
056-058 |
WIND
DIRECTION |
| 015 |
059-061 |
WIND
SPEED |
| 016 |
062-067 |
FLAG
FIELD (QUALITY FLAGS) |
|
017 |
068 |
TYPE
OF LEVEL |
| (1958-1972) |
(7125-7160) |
DATA GROUPS IN THE SAME
FORM AS TAPE FIELDS |
| (1973-1987) |
(7161-7196) |
008-017. REPEATED AS
MANY TIMES AS NEEDED |
| (1988-2002) |
(7197-7232) |
TO COMPLETE ONE UPPER
AIR OBSERVATION. A MAXIMUM OF 200 LEVELS ARE POSSIBLE. |
B) ELEMENT NAMES AND DEFINITIONS
| TAPE
FIELD |
RECORD
POSITION |
ELEMENT
NAME |
CODE
DEFINITIONS AND REMARKS |
| 001 |
1-8 |
STATION-ID |
STATION IDENTIFICATION-For
U.S. controlled and cooperative stations, this is a WBAN number. For
stations received through GTS, it is the WMO number. This field may
contain alphabetic characters for ships and remote sensed
observations. Numeric station numbers are right justified and zero
filled, while alphanumeric station identifiers are left justified
and blank filled. If unknown, this field contains
"99999999". If the station identification is unknown, both
latitude and longitude must be present. |
| 002 |
9-12 |
LATITUDE |
LATITUDE-The station
latitude in degrees and minutes. When unknown, this field contains
"9999". Latitude will not normally appear for land
stations. |
| 003 |
13 |
LATITUDE
CODE |
LATITUDE CODE - CODE used
to indicate the Northern (N) or Southern (S) latitudes. |
| 004 |
14-18 |
LONGITUDE |
LONGITUDE-The station
longitude in degrees and minutes. When unknown, this field contains
"99999". Longitude will not normally appear for land
stations. |
| 005 |
19 |
LONGITUDE
CODE |
LONGITUDE CODE-CODE used
to indicate CODE longitudes East (E) or West (W). |
| 006 |
20-29 |
DATE-TIME |
DATE/TIME-The scheduled
time of the observation, as defined by WMO. The format of date/time
is YYYYMMDDHH, i.e., year, month, day, hour. This field may never be
unknown. |
|
20-23 |
YEAR |
YEAR-This is the Year of
record. Range of values is 1946-current year processed. |
|
24-25 |
MONTH |
MONTH-This is the Month of
record. Range of values is 01-12. |
|
26-27 |
DAY |
DAY-This is the Day of
record, Range of values is 01 to 31. |
|
28-29 |
HOUR |
HOUR-This is the Hour of
record. Range of values is 00 to 23. Hour is GMT. Normal scheduled
observation times are 00 and 12 GMT. For selected periods and areas
observations may have been taken at other times, especially 06 and
18 GMT. |
| 007 |
30-32 |
NUMBER
REPEAT GROUPS |
NUMBER-OF-REPEATING-GROUPS--This
number represents the number of data levels found in the current
observation, including edited levels. Range of values is 001-200.
Two hundred is the maximum number of levels. |
| 008 |
33 |
LEVEL
QUALITY INDCTR |
LEVEL-QUALITY-INDICATOR--Denotes
the results of any quality controls applied to this level. |
Range
is as follows:
0 Original values are correct.
1 Original values are missing.
2 Original values doubtful, a corrected level follows.
3 Original values doubtful, uncorrected.
4 Original values in error, a corrected level follows.
5 Original values in error, uncorrected.
6 Corrected level.
9 Level not checked.
A-Z Indicators supplied by NMC.
(A-G, blank) Automatic via computer system.
A Passed vertical consistency check with tight limits.
B Failed vertical consistency check and has not been recomputed.
C Failed vertical consistency check and was recomputed.
D Failed vertical consistency check with tight limits and passed with
loose limits.
E (Not assigned)
F Has been checked but did not pass vertical consistency check with
loose limits.
G (Not assigned)
blank (Not specified)
(H-P, $) Manual via Human Intervention
H Hold value for next analysis run
I (Same as A)
J (Same as B)
K (Same as C)
L (Same as D)
M (Same as E)
N (Same as F)
O (Same as G)
P Purge from analysis run
ELEMENT NAMES AND DEFINITIONS
(CONTINUED)
| TAPE
FIELD |
RECORD
POSITION |
ELEMENT
NAME |
CODE
DEFINITIONS AND REMARKS |
| 009 |
34-37 |
TIME
SINCE RELEASE |
TIME-The elapsed time
since the release of the sounding, in minutes and tenths. If the
elapsed time is not known, this field contains "9999".
Range is 001 through 9999. Available only for U.S. quality
controlled stations beginning January 1981. |
| 010 |
38-42 |
PRESSURE
AT LEVEL |
PRESSURE-Atmospheric
pressure at the current level in kilopascals and hundredths. If
unknown, this field contains "99999". (TD-6201 only -
subsurface levels were generated from January 1, 1981 through
February 28, 1986. The values were always unknown. This practice was
stopped March 1, 1986). |
| 011 |
43-48 |
HEIGHT
AT LEVEL |
HEIGHT-Geopotential height
of the current level in whole meters. If unknown, this field
contains "-99999". Range of values is -99999 through
99999. |
| 012 |
49-52 |
TEMP
AT LEVEL |
TEMPERATURE-The free air
temperature at the current level in degrees and tenths Celsius. If
unknown, this field contains "-999". Range of values is
-999 through 999. |
| 013 |
53-55 |
RELATIVE
HUMIDITY AT LEVEL |
RELATIVE-HUMIDITY-The
relative humidity at the current level in whole percent. If unknown,
this field contains "999". In TD- 6202, relative
humidities are derived statistically for RH's not reported
originally. |
| 014 |
56-58 |
WIND
DIRECTION AT LEVEL |
WIND-DIRECTION-Direction
of the wind in whole degrees (nearest five degrees for observations
received through GTS). If unknown, this field contains
"999". |
| 015 |
59-61 |
WIND
SPEED AT LEVEL |
WIND-SPEED-Speed of the
wind in whole meters per second. If unknown, this field contains
"999". |
| 016 |
62-67 |
QUALITY
FLAGS |
QUALITY-FLAG -This field
contains the results of any quality control procedures, identifying
each individual element found in error (see table below). |
QUALITY CONTROL FLAG
0 Element is correct
1 Element is doubtful
2 Element is in error
3 Replacement value
4 Assumed or estimated value
9 Element not checked
A-Z Indicators supplied by NMC
(A-G, blank) Automatic via computer system.
A Passed vertical consistency check with tight limits.
B Failed vertical consistency check and has not been recomputed.
C Failed vertical consistency check and was recomputed.
D Failed vertical consistency check with tight limits and passed
with loose limits.
E (Not assigned)
F Has been checked but did not pass vertical consistency check
with loose limits.
G (Not assigned)
blank (Not specified)
(H-P, $) Manual via Human Intervention
H Hold value for next analysis run
I (Same as A)
J (Same as B)
K (Same as C)
L (Same as D)
M (Same as E)
N (Same as F)
O (Same as G)
P Purge from analysis run
ELEMENT NAMES AND DEFINITIONS
(CONTINUED)
| TAPE
FIELD |
RECORD
POSITION |
ELEMENT
NAME |
CODE
DEFINITIONS AND REMARKS |
| 016 |
62-67 |
QUALITY
FLAGS |
QUALITY-FLAG -This field
contains the results of any quality control procedures, identifying
each individual element found in error (see table below). |
|
62 |
TIME-QF |
Time
Quality Flag |
|
63 |
PRESSURE-QF |
Pressure
Quality Flag |
|
64 |
HEIGHT-QF |
Height
Quality Flag |
|
65 |
TEMP-QF |
Temperature
Quality Flag |
|
66 |
HUMIDITY-QF |
Humidity
Quality Flag |
|
67 |
WIND-QF |
Wind
Quality Flag |
| 017 |
68 |
TYPE-OF |
TYPE
OF LEVEL FLAG--See Table below. |
|
|
|
0 Surface
1 Mandatory
2 Significant
3 Generated
4 Tropopause
5 Maximum wind
9 Other/unspecified |
NOTE: TD-6201 through December 1975 will
contain Type of Level Flags 0, 1, and 9 only. During this period
significant, generated, tropopause and max wind all have Flag = 9.
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