Atec Geometrics-G-882TVG User Manual
Page 2
Software
Geometrics supplies MagMap2000 and
MagPick with each system for analysis and
interpretation of total field and gradient data.
Analytical signal is computed from the
transverse gradient, longitudinal time gradient
and computed vertical gradient to give a time-
variation free data set for contouring and
plotting of anomaly targets. Simultaneous dual
inversion routines in MagPick produce a
located target worksheet with models including
object latitude-longitude position and depth of
burial. Download
ftp://geom.geometrics.com/pub/mag/Software/
Posters.zip
for more information
MODEL G-882TVG MARINE CESIUM GRADIOMETER SPECIFICATIONS
O
PERATING
P
RINCIPLE
:
Self-oscillating split-beam cesium vapor (non-radioactive)
O
PERATING
R
ANGE
:
20,000 to 100,000 nT
O
PERATING
Z
ONES
:
The earth’s field vector should be at an angle greater than 10
° from
the sensor’s equator and greater than 10
° from the sensor’s long
axis. Automatic hemisphere switching.
S
ENSITIVITY WITH
CM-221
C
OUNTER
:
<0.004 nT/sq-rt-Hz RMS. Typically 0.01 nT P-P at a 0.1 second (10
Hz) sample rate (90% of all readings falling within the P-P envelope)
S
AMPLE RATE
:
Up to 40Hz in 100ms increments
H
EADING
E
RROR
:
<0.25 nT over entire 360
° equatorial and polar spins
A
BSOLUTE
A
CCURACY
:
<3 nT throughout range
O
UTPUT
:
Cycle of Larmor frequency = 3.498572 Hz/nT, RS-232 data at 115K
baud, concatenated data streams from 2 to 8 sensors depending on
sample rate
M
ECHANICAL
:
Total weight including 70kg (155 lbs) including two fish, wing and
tow cable. Sensor separation is 1. 5m for maximum gradient
C
ABLES
:
Vectran Reinforced multi-conductor tow cable. Breaking strength
3,600 lbs, 0.48 in OD, 500 ft standard maximum. Up to 2100 ft with
variable voltage supply. 200 ft (60m) weighs 17 lbs (7.7 kg).
O
PERATING
T
EMPERATURE
:
-30
°
F to +122
°
F (-35
°
C to +50
°
C)
S
TORAGE
T
EMPERATURE
:
-48
°
F to +158
°
F (-45
°
C to +70
°
C)
A
LTITUDE
:
Up to 30,000 ft (9,000 m)
D
EPTH RATING
:
Depth rated to 4,000 psi (2,700m)
P
OWER
:
115/220 VAC, 60 watts at turn-on and 40 watts thereafter
A
CCESSORIES
:
Standard:
Power/RS-232 multiconductor cable (electronics to power/data
junction box with 9 pin RS-232 connector and power lugs), lengths
to be specified, operation manual and reusable shipping and storage
containers
Optional:
Logging Software
MagLog (Logs GPS and Mag, shows trackplot, mag profile, other
data )
Processing software
MagMap2000, MagPick
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
05/09
GEOMETRICS
INC.
2190 Fortune Drive, San Jose, California 95131, USA
Tel: 408-954-0522 – Fax: 408-954-0902
Email
GEOMETRICS
EUROPE
20 Eden Way, Pages Industrial Park, Leighton Buzzard LU7 4TZ, UK
Tel: 44-1525-383438 – Fax: 44-1525-382200