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26
Table 3.2 Track information of the latest track
No.
Parameters
Type
Occupied Bytes
( Byte )
Note
1
Trace number
int32
4
1 - 999,999
2
Timestamp (ms)
int64
8
Epoch time
3
Distance (m)
float
4
Slant distance
4
Azimuth (°)
float
4
Radar coordinate system
5
Pitch angle (°)
float
4
Above the water level
6
Radial speed (m/s)
float
4
Stay away from being negative,
close to being positive
7
Target strength
int32
4
Dimensionless
8
Longitude (°)
float
4
/
9
Latitude (°)
float
4
/
10
Altitude (m)
float
4
/
11
Eastward speed ve (m/s)
float
4
Speed in X direction, increase to
positive
12
Northward speed vn (m/s)
float
4
Speed in Y direction, increase to
positive
13
Vertical speed vz (m/s)
float
4
Speed in Z direction, increase to
positive
14
x (m)
float
4
)
cos(
)
cos(
r
x
15
y (m)
float
4
)
sin(
)
cos(
r
y
16
z (m)
float
4
)
sin(
r
z
17
Whether this time is
relevant
int32
4
Determine if it is an extrapolation
point.
18
Number of tracked times
int32
4
/
19
Lost numbers
int32
4
When the number of losses is 4, the
track is terminated.
20
Reserved text
/
8
/
