TM 5-6675-318-14
Table 4-15. CODE 39 DISPLAYS FOR TRANSLOCATING FROM 2-SITE TAPE - Cont
While the MX 1502 is processing the data from a particular pass, it displays the
number of that pass.
Processing Pass 34
When the MX 1502 has completed processing pass data, it displays either CODE, SITE
if a new site record is encountered, or END if the end of data on tape is
encountered.
Processing Completed
4 - 6 . 3 .4
Datum Conversions.
4 - 6 . 3 . 4 . 1 G e n e r a l.
I n i t i a l c o m p u t a t i o n s f o r a s a t e l l i t e - d e r i v e d p o s i t i o n d e f i ne
i t s l o c a t i o n i n a s a t e l l i t e d a t u m t h a t i s s i m i l a r , b u t n o t i d e n t i c a l , t o t h e W G S - 72
datum. When entering the datum shift transformations, a rotation about the Z axis
(RZ) of +0.26 arc seconds should be included. Since most national survey organiza-
tions work in coordinates referenced to a local datum and reference ellipsoid, the
satellite datum solution must be converted to the local datum by using the datum
s h i f t c o n s t a n t s a n d t h e Z a x i s r o t a t i o n . T a b l e 4 - 1 6 l i s t s t h e c o n s t a n t s r e q u i r e d to
convert from WGS-72 coordinates to local datums. These constants may be used to
define a local datum, using code 100. Origin offset constants X, Y, and Z have the
appropriate signs for converting from WGS-72 to local datums. Other publications
may list constants for converting from local datums to WGS-72, and the signs will be
opposite to those listed in Table 4-16.
NOTE
These constants in Table 4-16 are approximate values that have been averaged
over large areas. Therefore, they may not be accurate enough for specific
areas and applications .
4-98
