NOTE: files have been reformatted for easier import and a header added but
this outline provides more detail on each variable.

SOJ File Data Format

The following table shows data format of Navigation System on R/V MIRAI, JAMSTEC.
This file has a series of 250 bytes length records. Each records are defined as :

Start byte	Bytes	Description			Sample [unit]
----------	-----	-----------			-------------
1		5	Record header			$SOJ (Fixed)
6		5	Local time offset		+9.0
11		1	Delimiter			,
12		8	Date				YYYYMMDD [UTC]
20		1	Delimiter			,
21		6	Time				HHMMSS [UTC]
27		1	Delimiter			,
28		3	Datum				W84 / TD
31		1	Delimiter			,
32		3	Positioning sensor		HYB / GP1 / GP2 / NG
35		1	Delimiter			,
36		1	Status-1			V(valid) / I(invalid)
37		1	Delimiter			,
38		5	Status-2			999.9 (HDOP for GPS sensor)
43		1	Delimiter			,
44		2	Status-3			12 (Number of GPS satellites)
46		1	Delimiter			,
47		12	Latitude			35-00.12345N
59		2	Delimiter			,
61		13	Longitude			135-00.12345E
74		2	Delimiter			,
76		3	Data header			SC: (Fixed)
79		3	Data sensor			HYB / GP1 / GP2
82		1	Delimiter			,
83		1	Speed status			G(ground) / W(water) / I(invalid)
84		5	Speed				(-)15.0 [knot]
89		1	Delimiter			,
90		3	Data sensor			HYB / GP1 / GP2
93		1	Delimiter			,
94		1	Course status			G(ground) / W(water) / I(invalid)
95		5	Course				270.0 [deg] 
100		1	Delimiter			,
101		1	Doppler sonar status		V(valid) / I(invalid)
102		5	Doppler sonar speed		(-)15.0 [knot]
107		1	Delimiter			,
108		1	Gyro status			V(valid) / I(invalid)
109		5	Gyro course			270.0
114		1	Delimiter			,
115		2	Data header			T: (Fixed)
117		1	Delimiter			,
118		6	Air temperature     		(-)23.45 [deg-C]
124		1	Delimiter			,
125		1	SST status			V(valid) / I(invalid)
126		7	SST				(-)23.456 [deg-C]
133		1	Delimiter			,
134		2	Data header			D: (Fixed)
136		1	Data sensor			M (MBES) / A (ADCP bottom depth)
137		1	Delimiter			,
138		1	Bathymetry status		V(valid) / I(invalid)
139		7	Sea depth			12345.6 [m]
146		1	Delimiter			,
147		2	Data header			A: (Fixed)
149		1	Pressure status     		V(valid) / I(invalid)
150		6	Atmosperic pressure		1013.0 [hPa]
156		1	Delimiter			,
157		1	Humidity status		V(valid) / I(invalid)
158		3	Relative Humidity		100 [%]
161		1	Delimiter			,
162		2	Data header			W: (Fixed)
164		1	Wind status			V(valid) / I(invalid)
165		3	Relative wind direction	180 [deg]
168		1	Delimiter			,
169		4	Relative wind speed		12.3 [m/s]
173		1	Delimiter			,
174		3	True wind direction		 90 [deg]
177		1	Delimiter			,
178		4	True wind speed     		23.4 [m/s]
182		1	Delimiter			,
183		2	Data header			R: (Fixed)
185		1	Rainfall status    	 	V(valid) / I(invalid)
186		4	Rainfall amount     		12.3 [mm]
190		1	Delimiter			,
191		1	Radiation status		V(valid) / I(invalid)
192		4	Radiation momentary		1.23 [kw/m^2]
196		1	Delimiter			,
197		2	Data header			E: (Fixed)
199		1	EPCS status			V(valid) / I(invalid)
200		7	Salinity			34.5678 [o/oo]
207		1	Delimiter			,
208		2	Data header			H: (Fixed)
210		1	GPS altitude status		V(valid) / I(invalid)
211		6	GPS altitude			(-)999.9 [m]
217		1	Delimiter			,
218		1	Magnetic data status		V(valid) / I(invalid)
219		6	Cesium magnetic data		123456 [0.1 nT]
225		1	Delimiter			,
226		1	Gravity status      		V(valid) / I(invalid)
227		9	Gravity 			(-)12345.67 [mGal]
236		1	Delimiter			,
237		1	Doppler sonar status		V(valid) / I(invalid)
238		5	Current direction		123.4 [deg]
243		1	Delimiter			,
244		4	Current speed			 1.2 [knot]
248		1	Delimiter			,
249		2	Terminator			(CR, LF)

(250 bytes)