USERDATUM
Sets user customized ellipsoid and datum transformation
|
Platform: |
OEM719, OEM729, OEM7500, OEM7600, OEM7700, OEM7720, PwrPak7, CPT7, CPT7700, SMART7, SMART2 |
This command is like the USEREXPDATUM command but without parameter rates. See the USEREXPDATUM command for details on command usage and parameter meaning.
When the USERDATUM command is entered, the USEREXPDATUM command is issued internally with the USERDATUM command values. It is the USEREXPDATUM command that appears in the RXCONFIG log. Only a single set of USEREXPDATUM or USERDATUM entered parameters is valid at one time. Newer parameters entered by either command will overwrite previously entered parameters.
See the DATUM command for important guidance and details on datum operation.
Message ID: 78
Abbreviated ASCII Syntax:
USERDATUM semi_major_axis flattening dx dy dz rx ry rz scale
Factory Default:
USERDATUM 6378137.0 298.2572235628 0.0 0.0 0.0 0.0 0.0 0.0 0.0
ASCII Example:
USERDATUM 6378206.400 294.97869820000 -12.0000 147.0000 192.0000 0.0000 0.0000 0.0000 0.000000000
|
Field |
Field Type |
ASCII Value |
Binary Value |
Description |
Format |
Binary Bytes |
Binary Offset |
|
1 |
Command header |
- |
- |
USERDATUM header This field contains the command name for abbreviated ASCII or the message header for ASCII or Binary. |
- |
H |
0 |
|
2 |
semi_major_axis |
6300000.0 - 6400000.0 |
Datum semi-major axis (a) (metres) |
Double |
8 |
H |
|
|
3 |
flattening |
290.0 - 305.0 |
Reciprocal Flattening, |
Double |
8 |
H+8 |
|
|
4 |
dx |
± 2000.0 |
Translation values (metres) |
Double |
8 |
H+16 |
|
|
5 |
dy |
± 2000.0 |
Double |
8 |
H+24 |
||
|
6 |
dz |
± 2000.0 |
Double |
8 |
H+32 |
||
|
7 |
rx |
± 10.0 radians |
Datum rotation angles A positive sign is for counter clockwise rotation and a negative sign is for clockwise rotation |
Double |
8 |
H+40 |
|
|
8 |
ry |
± 10.0 radians |
Double |
8 |
H+48 |
||
|
9 |
rz |
± 10.0 radians |
Double |
8 |
H+56 |
||
|
10 |
scale |
± 10.0 ppm |
Scale value is the difference in ppm |
Double |
8 |
H+64 |
|