G−858 magmapper™ specifications – Atec Geometrics-G-858 User Manual
Page 4
G−858 MagMapper™ SPECIFICATIONS
MAGNETOMETER / ELECTRONICS
Operating Principle: Self-oscillating split-beam Cesium Vapor (non-
radioactive Cs
133
) with automatic hemisphere switching.
Operating Range: 20,000 nT to 100,000 nT
Operating Zones: For highest signal-to-noise ratio, the sensor long axis
should be oriented at 45
,
30to the earth’s field but operation will continue
through 45
,
35
. Sensor is automatic hemisphere switching.
Sensitivity Statistics: 90% of all reading will fall within the following Peak-
to-Peak envelopes:
0.03 nT at 0.2 sec cycle rate
0.02 nT at 0.5 sec cycle rate
0.01 nT at 1.0 sec cycle rate
Noise: < 0.008 nT/
Hz-RMS
Heading Error: < 1.5 nT including backpack and GPS
Gradient Tolerance: > 500 nT /inch (>20,000 nT/ meter)
Temperature Drift: < 0.05 nT per
C
Cycle Rate: Variable from 0.1 sec to 1 hr in 0.1 sec steps or by external
trigger.
Data Storage: Non-volatile RAM with capacity for 8 to 12 hrs of
magnetometer, time, event marks, field notes and XYZ or GPS locations.
Audio Output:
1. Audio tone of field variation; pitch and volume adjustable. (Search
mode)
2. Audio pulse each 1 second (Pace metronome).
3. Alarm for loss of signal, low battery or quality control setting exceeded.
Data Output: Three wire RS-232 standard serial port, optional continuous
real time transmittal of data via RS-232 to PC. Total memory output transfer
time less than 5 min. at 115,200 baud.
Visual Output: 320 x 200 graphic liquid-crystal display, daylight visible
with selectable outputs for:
1. Data display: Up to 5 stacked profiles, real time or review mode. Survey
grid showing boundaries and position.
2. All system set-up functions, e.g., memory status, data transfer, sample
time.
3. All Survey set-up functions, e.g., survey profile number and direction,
station number or GPS data transfer protocol, line number.
4. Survey monitoring functions, e.g. total field, noise level, profile number
x or x-y coordinates.
Internal Clock: Resolution of 0.1 sec, drift: < 1 sec/day
Battery Life:
1.
24 VDC rechargeable gel cell, 6 hrs for Mag w GPS. Magnetic
effect less than 1.5 nT (γ) at 4 ft
2.
Internal backup battery for clock and non-volatile RAM.
Software: Supplied as part of the basic system and including functions for:
Operating Software:
1. Survey Modes:
a. Search survey
b. Simple survey
c. Map survey, station or continuous
d. Base station
2. Data acquisition/display:
a. Acquire and store data and survey functions.
b. Display profiles, total field to 0.1 nT resolution, survey / map
parameters and diagnostics.
Post-acquisition Software: MagMap2000 software for installation on
customer’s computer.
1. Data transfer and corrections:
a. Transfer of data from the field Magnetometer
GPS, or Base station to PC.
b. Diurnal correction using base station data.
c. Processing the corrected data into ASCII values of X-Y-Z.
2. Data Processing functions include spike editing, spline filtering,
repositioning of X, Y, Z or GPS Lat/Long, conversion to UTM
coordinates, profile and contour map plotting..
MECHANICAL
Sensor: 2-3/8” dia., 6-3/4” long, 12 oz. (6cm x 15 cm, 340 grams)
Backpack: Backpack for Magnetometer, 9.5 lb (4.3 kg). Includes Nylon
chest harness with all cables attached (1 kg to 1.3 kg)
Battery: 3” H, 5” W, 8” L, 3.5 lbs (8 cm x 13 cm x 20 cm, 1.6 kg) belt-
mounted, attaches to harness.
Console: 6” W, 3” H, 11?”L, 3.5 lbs. (15 cm x 8 cm x 28cm, 1.6 kg), attaches
to battery belt and harness. Magnetic effect less than 1 nT at 4 ft
ENVIRONMENTAL
Operating Temperature: -25
C to +50
C (-13
F to + 122
F)
Storage Temperature: -35
C to + 60
C (-30
F to + 140
F)
Water Tight: Weatherproof in driving rain
Shock: Survive a 3 ft drop onto a hard surface
WARRANTY
: 1 YEAR on G-858 and sensor, one year on accessories
Novatel Smart V1™ Specs:
• Code and carrier phase tacking with 1Hz (optional 20 Hz) Position,
velocity, time output or optional 20 Hz raw data output
• SBAS capable and designed for harsh environments
• RS-232, RS-422 compatible interface
Hardware Specs:
Size and Weight
115mm dia x 90mm height, Weight: 575 g
Input Voltage:
+9 to +28 VDC
Power Consumption:
1.8W (typical)
Com Ports:
1 RS-232 (optional 2 RS-232) at up to 19,200
baud
Operating Temperature:
-40°C to +75° C
GPS L1 Product Performance
Position Accuracy:
Single point L1
<5 m CEP
WAAS L1
<1.5m CEP
Measurement Precision:
L1 C/A Code
18 cm RMS
L1 Carrier Phase
1.5 mm RMS
Data Rates:
Measurements
1 Hz (optional 20 Hz)
Position
1 Hz (optional 20 Hz)
Time to First Fix:
Cold Start
60 s
Warm Start
45 s
Hot Start
35 s
Signal Reacquisition:
0.5 s typical
GEOMETRICS INC.
2190 Fortune Drive, San Jose, California 95131, USA V1.3 06-20-2012
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 – Email
GEOMETRICS CHINA
Laurel Technologies, Ste 1807-1810,
Kun Tai Int’l Mansion, #12B, Chaowai St., Beijing 100020, China
Tel: 86-10-5879-0099
– Fax: 86-10-5879-0989 – Email: