TM 5-6675-250-20
2-16. DETERMINATION OF AZIMUTH VALUE FOR REFERENCE MIRROR.
This task covers:
S e r v i ce
INITIAL SETUP
M a t e r i a l / P a r t s
M e t h e l e t h e l k e y t o n ( M E K )
F e d e r a l S p e c i f i c a t i on
TT-M-261, Item 3, Appendix C
P e r s o n n e l R e q u i r ed
MOS 82E Surveying
I n s t r u m e n t M e c h a n ic
L O C A T I O N / l T EM
A C T I O N
R E M A R KS
N O T E
At 100-hour intervals (approximate) the reference mirror shall be checked
and a new azimuth reference determined if needed. Determination of the
azimuth value for the reference mirror shall also be performed upon
reassembly of the GRU after major repairs and maintenance. The azimuth
reference shall also be verified if the instrument sustains a severe shock or
o t h e r d i s t u r b a n c e g r e a t e r t h a n e n c o u n t e r e d i n n o r m a l h a n d l i n g.
S e t u p t h e i n s t r u m e n t w i t h G R U o v e r a b a s e l i n e o f k n o w n a z i m u t h .
1.
C o a r s e
a.
Coarse level the instrument by releasing one
leveling of
of the tripod leg clamps (1).
u n i t
b.
Adjust the leg (2) to obtain a level indication
on the tripod circular level (3). Repeat pro-
cedure for each of the other two legs.
2-62
