1) B10 10-degree box
DATSAV2 : input = LON, LAT
(a): Convert LON and LAT to B10 by the uniform convention.
2) YR year
DATSAV2 : input = YEAR (pos.23-26)
3) MO month
DATSAV2 : input = MO (pos.27-28)
4) DY day
DATSAV2 : input = DA (pos.29-30)
5) HR hour
DATSAV2 : input = HR (pos.31-32),MN (pos.33-34)
(a): Change the input units from hour and minute to hundredths
of hours.
6) TI time indicator
DATSAV2 : input = no corresponding field
(a): If the input of hour (above field) is not missing,
set TI = 2 (hour plus minutes).
7) LON longitude
DATSAV2 : input = LON (pos.40-45)
: input = longitude in degrees and minutes -18000 to +18000
(west longitude is positive and east longitude is negative)
(a): Signs of longitude are reversed, so that east longitudes
are made positive and west longitudes are made negative.
(b): Minutes are converted to degrees to hundredths.
(c): Longitudes are then converted to the 0 to 360 positive
eastward system.
(d): Longitudes of 360 are changed to 0.
8) LAT latitude
DATSAV2 : input = LAT (pos.35-39)
(a): Change the input units from degrees and minutes to hundredths
of degrees.
9) LI lat/lon indicator
DATSAV2 : input = no corresponding field
(a): Set LI = 4 (degrees and minutes).
10) DCK deck
DATSAV2 : input = no corresponding field
(a): Set DCK = 888
(US Air Force Global Weather Central (GWC)).
11) SID source ID
DATSAV2 : input = no corresponding field
(a): Set SID = 79
(US Air Force Global Weather Central (GWC): DATSAV2 format).
12) PT platform type
DATSAV2 : input = no corresponding field
13) QI quality indicator
DATSAV2 : input = no corresponding field
14) DS dup status
DATSAV2 : input = no corresponding field
15) DC dup check
DATSAV2 : input = no corresponding field
16) TC track check
DATSAV2 : input = no corresponding field
17) PB pressure bias
DATSAV2 : input = no corresponding field
18) DI wind direction indicator
DATSAV2 : input = no corresponding field
19) D wind direction
DATSAV2 : input = WIND DIR (pos.89-91)
(a): If the input equals 0, set D = 361 (calm).
(b): If the input equals 990, set D = 362 (variable).
20) WI wind speed indicator
DATSAV2 : input = iw (pos.60)
(a): If the input of wind speed (next field) is not
missing, set WI = input.
21) W wind speed
DATSAV2 : input = WIND SPEED (pos.92-95)
22) VI visibility indicator
DATSAV2 : input = no corresponding field
23) VV visibility
DATSAV2 : input = VSBY (pos.117-122)
(a): Map the input to VV as follows:
pos.117-122 VV
' 0' 90 = less than 0.05 kilometers
' 50' 91 = 0.05
' 200' 92 = 0.2
' 500' 93 = 0.5
' 1000' 94 = 1
' 2000' 95 = 2
' 4000' 96 = 4
' 10000' 97 = 10
' 20000' 98 = 20
' 50000' 99 = 50 or more
24) WW present weather
DATSAV2 : input = ww (pos.124-126)
25) W1 past weather
DATSAV2 : input = W1 (pos.139-140)
26) W2 second past weather
DATSAV2 : input = W2 (pos.141-142)
27) SLP sea level pressure
DATSAV2 : input = SEA LEVEL PRESS (pos.151-155)
28) T1 temperature indicator
DATSAV2 : input = no corresponding field
(a): If the temperatures (next 4 fields) are not
missing, set T1 = 9 (other (refer to metadata)).
29) AT air temperature
DATSAV2 : input = DRY BULB TEMP (pos.143-146)
(a): Convert the input from Kelvin to Celsius [4].
30) WBT wet bulb temperature
DATSAV2 : input = no corresponding field
31) DPT dew point temperature
DATSAV2 : input = DEW PT TEMP (pos.147-150)
(a): Convert the input from Kelvin to Celsius [4].
32) SST sea surface temperature
DATSAV2 : input = TwTw (SA pos.3-6)
(a): Convert the input from Kelvin to Celsius [4].
33) SI sea surface temperature method indicator
DATSAV2 : input = no corresponding field
34) N total cloud amount
DATSAV2 : input = SKC (pos.104-105)
35) NH lower cloud amount
DATSAV2 : input = Nh (pos.106-107)
36) CL low cloud type
DATSAV2 : input = CL (pos.108-109)
37) HI cloud height indicator
DATSAV2 : input = no corresponding field
38) H cloud height
DATSAV2 : input = hh (pos.110-112)
(a): Map the input to H as follows:
pos.110-112 H
' 90' 0 = 0-149 feet 0-49 meters
' 91' 1 = 150-299 50-99
' 92' 2 = 300-599 100-199
' 93' 3 = 600-999 200-299
' 94' 4 = 1000-1999 300-599
' 95' 5 = 2000-3499 600-999
' 96' 6 = 3500-4999 1000-1499
' 97' 7 = 5000-6499 1500-1999
' 98' 8 = 6500-7999 2000-2499
' 99' 9 = >=8000 or >=2500 or
39) CM middle cloud type
DATSAV2 : input = CM (pos.113-114)
40) CH high cloud type
DATSAV2 : input = CH (pos.115-116)
41) WD wave direction
DATSAV2 : input = no corresponding field
42) WP wave period
DATSAV2 : input = Pwa (UA pos.3-5)
input = Pw (UD pos.3-5)
43) WH wave height
DATSAV2 : input = Hwa (UA pos.6-8)
input = Hw (UD pos.6-8)
(a): Change the input from tenths to halves.
44) SD swell direction
DATSAV2 : input = Dw1 (UG pos.9-10)
45) SP swell period
DATSAV2 : input = Pw1 (UG pos.3-5)
46) SH swell height
DATSAV2 : input = Hw1 (UG pos.6-8)
(a): Change the input from tenths to halves.
47) C1 country code
DATSAV2 : input = no corresponding field
48) C2 second country code
DATSAV2 : input = no corresponding field
49) SC ship course
DATSAV2 : input = Ds (QA pos.3-4)
50) SS ship speed
DATSAV2 : input = Vs (QA pos.5-6)
51) A barometric tendency
DATSAV2 : input = a (pos.156)
52) PPP amount of SLP change
DATSAV2 : input = ppp (pos.157-159)
53) IS ice accretion
DATSAV2 : input = Is (WA pos.3)
54) ES ice thickness
DATSAV2 : input = Es (WA pos.4-5)
55) RS ice accretion rate
DATSAV2 : input = Rs (WA pos.6)
56) II ID indicator
DATSAV2 : input = no corresponding field
57-64) ID(8) ID/call sign
DATSAV2 : input = CALL LTRS (pos.68-71), Remarks (pos.9-13)
(a) Set ID to the first input. If the first input is
equal to 'DRIB' and the second input is not missing
set ID to the second input.
65) OS observation source
DATSAV2 : input = no corresponding field
66) OP observation platform
DATSAV2 : input = no corresponding field
67) T2 second temperature indicator
DATSAV2 : input = no corresponding field
68) IX station/weather indicator
DATSAV2 : input = Ix (pos.164)
69) WX wave period indicator
DATSAV2 : input = no corresponding field
70) SX swell period indicator
DATSAV2 : input = no corresponding field
71) IRD IMM receipt date
DATSAV2 : input = no corresponding field
72) A6 allowance 6 flag
DATSAV2 : input = no corresponding field
{3. Contents of supplemental attachment (Attm4)}
DATSAV2 : input = (pos.1-22), (pos.46-59), (pos.61-67), (pos.72-81),
(pos.96-103), (pos.123), (pos.127-138), (pos.160-163),
Additional Data and Remarks sections (or until the attachment
is full)
{4. Notes}
[4] Temperatures in Kelvin were converted to Celsius by subtracting 273.2.
{References}
U.S. Air Force, 1986: Climatic Database Users Handbook No. 4, DATSAV2 Surface
(USAFETAC/UH-86/004). USAF Environmental Technical Applications Center,
Federal Building, Asheville, N.C.