File Format of Aerological observation data

File Format of Aerological data

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Aerological data files are composed of all the station data groups on the same date in UTC. The station data groups are composed of HEADER-1,HEADER-2 and DATA.

HEADER-1 and HEADER-2 represent an observation declaration and station information, respectively. DATA includes observation data at the station. The character `63' on the "LEVEL INDICATOR" of DATA represents the end record of each station data group.

HEADER-1 (Observation declaretion)
Element Start Position Field Type Description of Field

DECLARATION 1 A4 ' AERO '

**HEADER-1 (Observation declaretion)**
Element	Start Position	Field Type	Description of Field
DECLARATION	1	A4	' AERO '

HEADER-2 (Station information)
Element Start Position Field Type Description of Field

AERO_CODE 3 A11 Ship's code (listed in Table).

LATITUDE 16 I5 Latitude in hundredths of degrees (positive for North and negative for South Latitude)

LONGITUDE 22 I6 Longitude in hundredths of degrees (positive for East and negative for West Longitude)

LAUNCHER HEIGHT 29 I4 Height of launcher in meters.

YEAR 34 I4 Year in UTC (last two or four digit)

MONTH 39 I2 Month in UTC

DAY 42 I2 Day in UTC.

HOUR 46 I2 Hour in UTC of sonde launch time.

MINUTE 49 I2 Minute in UTC of sonde launch time.

SENSOR S/N 52 I9 Sonde sensor serial number.

**HEADER-2 (Station information)**
Element	Start Position	Field Type	Description of Field
AERO_CODE	3	A11	Ship's code (listed in Table).
LATITUDE	16	I5	Latitude in hundredths of degrees (positive for North and negative for South Latitude)
LONGITUDE	22	I6	Longitude in hundredths of degrees (positive for East and negative for West Longitude)
LAUNCHER HEIGHT	29	I4	Height of launcher in meters.
YEAR	34	I4	Year in UTC (last two or four digit)
MONTH	39	I2	Month in UTC
DAY	42	I2	Day in UTC.
HOUR	46	I2	Hour in UTC of sonde launch time.
MINUTE	49	I2	Minute in UTC of sonde launch time.
SENSOR S/N	52	I9	Sonde sensor serial number.

DATA (Observation data)
Element Start Position Field Type Description of Field

LEVEL INDICATOR 1 I2 Standard pressure level and significant level indicator(listed in Table):

PRESSURE 5 I5 Pressure in tenths of hectopascals.

HEIGHT 12 I5 Height in meters.

TEMPERATURE 19 I5 Temperature in tenths of degrees Celsius.

HUMIDITY 26 I3 Relative humidity in %

WIND DIRECTION 32 I3 Wind direction in degrees.

WIND SPEED 37 I4 Wind speed in the units of 0.1 m/s.

**DATA (Observation data)**
Element	Start Position	Field Type	Description of Field
LEVEL INDICATOR	1	I2	Standard pressure level and significant level indicator(listed in Table):
PRESSURE	5	I5	Pressure in tenths of hectopascals.
HEIGHT	12	I5	Height in meters.
TEMPERATURE	19	I5	Temperature in tenths of degrees Celsius.
HUMIDITY	26	I3	Relative humidity in %
WIND DIRECTION	32	I3	Wind direction in degrees.
WIND SPEED	37	I4	Wind speed in the units of 0.1 m/s.

Ship code.
Ship Name CALL SIGN AERO_CODE

Kofu Maru JDWH 1 2 47 002

Ryofu Maru JGQH 1 2 47 646

Keifu Maru JPBN 1 2 47 000

Chofu Maru JCCX 1 2 47 001

Seifu Maru JIVB 1 2 47 003

**Ship code**.
Ship Name	CALL SIGN	AERO_CODE
Kofu Maru	JDWH	1 2 47 002
Ryofu Maru	JGQH	1 2 47 646
Keifu Maru	JPBN	1 2 47 000
Chofu Maru	JCCX	1 2 47 001
Seifu Maru	JIVB	1 2 47 003

Aerological lebel indicator.
Code Definition

01 Significant level for temperature and/or humidity

02 Standard pressure level

05 Tropopause

16 Significant level for wind direction/speed

17 Significant level for temperature/humidity and wind

24 Wind speed maximum

63 End record

Code	Definition
01	Significant level for temperature and/or humidity
02	Standard pressure level
05	Tropopause
16	Significant level for wind direction/speed
17	Significant level for temperature/humidity and wind
24	Wind speed maximum
63	End record