TM 5-6675-318-14
4-6.3.1 Standard Mode.
This mode enables the operator to obtain the two
d i m e n s i o n a l ( 2 D ) a n d p o i n t p o s i t i o n l o c a t i o n ( 3 D ) o f a s u r v e y s i t e . S a t e l l i te
data is collected in real time and is used to compute a 2D and 3D position based
on site location data entered into the satellite surveyor via the keyboard. The 2D,
3D, and site identification data will be recorded on tape cassettes for post
p r o c e s s i n g.
All doppler data and majority-voted satellite message data is recorded
on tape.
To obtain a 3D position requires 4 to 10 acceptable satellite passes, and
the average time between satellite passes is a function of the latitude. Ten passes
can be obtained in as little as 6.3 hours at high latitudes or could take 15.8 hours
at the equator.
A c c u r a c y o f f i n a l 3 D p o i n t p o s i t i o n i n g r e s u l t i s d e p e n d e n t o n t h e
number of satellite passes as given in Table 4-4.
Table 4-4. ACCURACY REQUIREMENTS
Minimum
H o r i z o n t al
Number of
Minimum
P o s i t i on
Doppler
MX 1502
Number of
Accuracy
P o s i t i o n i ng
U n i ts
Passes
Requirement
Technique
Required
Required
<37 meters
(<21.39 feet)
<10 meters
( 32.81 feet)
<1 meter
( 3.28 feet)
>50 Contimeters
meter
f e e t)
Single Pass
1
1 acceptable pass.
3D Positioning
(Height must be
known to +20 m
[ + 6 5 . 6 f e e t ] ).
3D Positioning
1
15 acceptable passes.
Field
or
Real
Time
2
4 acceptable passes
T r a n s l o c a t i on
common to each
s t a t i o n .
Field
or
Real
Time
2
17 acceptable passes
T r a n s l o c a t i on
common to each
s t a t i o n .
FUNCTIONAL DIAGRAM, STANDARD MODE
4-60
Change 2
