The Native Heritage(NH) Magnetometer from Heritage Geophysics offers the exploration archaeologist an unsurpassed combination of high sensitivity cesium magnetometer, coupled to a high accuracy GPS, and delivered with a magnetic mapping package to accurately model and locate areas of interest. The NH Magnetometer is an excellent choice for archaeology exploration, gold and placer development, even those looking at old treasure maps.
The Native Heritage Magnetometer allows the operator to quickly acquire a high-resolution walking survey and easily generate a magnetic anomaly map of potential mineral zones. The NH Magnetometer is designed to operate in the harshest conditions you will encounter, from scorching sandstorms to arctic blizzards. The rugged and field proven console and cesium sensor never need factory recalibration or adjustment. Continuous data acquisition with integrated GPS yield faster surveys allowing the operator to map large areas with ease.
Gold exploration surveys for placer deposits benefit from the NH Magnetomer's high speed, low noise and high sensitivity. It incorporates a WAAS/EGNOS enabled NovatelT GPS for accurate survey position and operates world wide. The system includes free processing software providing data profiling or contouring for in-field or laboratory analysis.
This low-cost cesium vapor magnetometer system offers archaeologists and survey companies the best total field magnetic survey tool available. A graphical interface makes survey design and data acquisition quick and efficient. A "Simple" or "Mapped" Mode uses line numbers and known staked reference points to define the map parameters. Or the user may use the integrated Novatel Smart AntennaT GPS for mapping positions automatically. Position information may come from an external GPS, from regularly spaced fiducial marks input by the operator or both. At any time, the user may switch to "profile" mode to observe the last 5 data lines as stacked profiles.
Data is collected by the NH Magnetometer in up to 5 separate survey files and transferred via high speed RS−232 data link (or USB with converter) to a computer for further analysis and map generation. The full featured graphical data editing program MagMap2000 is provided to allow repositioning, realignment, GPS smoothing, data filtering and interpolation of the data. After editing, the data is formatted in either Surfer for Windows or Geosoft formats for further plotting and analysis.
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The NH Magnetometer data acquisition offers either continuous (automatic) or discrete station recording. Data quality is uniformly high and lower costs are inherent for most projects due to the high sampling rate of the instrument in continuous mode. This allows the operator to survey an area at a fast pace, covering as much as 10 times more area in a given time period than other magnetometers.
In addition to its speed and sensitivity, the NH Magnetometer is also reliable, economical, and easy to use. Electrical connectors on the sensor have been eliminated in order to increase reliability and reduce setup time. The internal firmware is streamlined to include those features important for mining exploration.
The concentration of magnetic minerals often varies with geological formation or chemical alteration and can indicate disturbed structures or fired clay shards. A primary application of the HR Mag is surveying for heritage sites, native settlement sites, and other artifacts. It can also be used for local environmental studies such as mapping waste sites, locating buried metal drums and storage tanks buried pipelines, well-heads and other ferrous structures.
The system produces raw data of the highest quality. Data is digitally recorded in compressed form in high capacity RAM and later transferred to a computer for permanent storage and processing. Sensitivity, resolution and recording rate of the cesium magnetometer are user selectable as well as mapped survey grid coordinates or GPS position data. Data storage is sufficient to record 8 hours of data at the maximum rate of 5 Hz. Battery life is approximately 8 hours powering both the Magnetometer and Novatel Smart AntennaT GPS.
A complete software package called MagMap2000 is supplied as an integral part of the system and provides:
- Transfer of the raw magnetometer, base station and other survey data to the client PC.
- Standard corrections for position errors, transients, and time varying errors (diurnal).
- GPS track plot with adjustable smoothing and independent point editing.
- Repositioning, linear interpolation and format of corrected data into X, Y, Z or Latitude/Longitude ASCII columnar values for use with Surfer for Windows, Geosoft or other client supplied contouring programs.
- Conversion of GPS to UTM coordinate system using a selected Datum.
In addition to the standard MagMap2000 download and editing software, Heritage Geophysics is pleased to offer MagPickT, a full featured potential field analysis package with excellent profile and contour map generation capability. MagPickT can perform source body inversion, reduction to the pole, upward continuation and a variety of other transforms and gradient extractions. We are also pleased to offer a WindowsT version of CSAZIIT, a world total field map, field inclination and sensor orientation program for performing surveys worldwide in any survey direction. MagMap2000, MagPickT and CSAZIIT are available on our website for free download. Manuals for these programs are supplied as internal documents in PDF format.
Accurate data positions are as important as accurate magnetic field measurements and Heritage Geophysics is pleased to include the Novatel Smart AntennaT as an integral part of the system. This small light-weight, all-in-one GPS Antenna and electronics package is WAAS/EGNOS ready for <1.5m positioning. The Smart AntennaT systems is installed on a non-magnetic back pack and carefully screened and degaussed for minimum magnetic interference.|
The Smart Antenna is designed to be quickly assembled and installed on the backpack, with special mounting studs and a cable wiring harness for data and power distribution. The storage case allows the main components to be stored as a unit providing minimum assembly at the job site. The storage case is a rugged reusable fiberglass and aluminum travel case with handles and wheels for easy transport.
G−859 Mineral Mag SPECIFICATIONS
MAGNETOMETER / ELECTRONICS
Operating Principle: Self-oscillating split-beam Cesium Vapor (non-radioactive Cs133) with
automatic hemisphere switching.
Operating Range: 17,000 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
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 0.2 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 tone of field variation; pitch and volume adjustable. (Search mode)
- Audio pulse each 1 second (Pace metronome).
- 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:
Data display: Up to 5 stacked profiles, real time or review mode.
Survey grid showing boundaries and position.
- All system set-up functions, e.g., memory status, data transfer, sample
- All Survey set-up functions, e.g., survey profile number and direction,
station number or GPS data transfer protocol, line number.
- Survey monitoring functions, e.g. total field, noise level, profile number
x or xy coordinates.
Internal Clock: Resolution of 0.1 sec, drift: < 1 sec/day |
- 24 VDC rechargeable gel cell, 6 hrs for Mag w GPS.
Magnetic effect less than 1.5 nT (γ) at 4 f
- Internal backup battery for clock and non-volatile RAM.
Software: Supplied as part of the basic system and including functions for:|
- Simple survey
- Map survey, station or continuous
- Base station
- Data acquisition/display:
- Acquire and store data and survey functions.
- 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.|
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.
- 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.
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
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: 2 YEARS on G-859 and sensor, one year on accessories
Novatel Smart Antenna Specs:
Code and carrier phase tacking with 5 Hz Position, velocity, time output
or 10 Hz raw data output
- SBAS capable and designed for harsh environments
- RS-232 compatible interface
| Size and Weight:|| 115mm dia x 90mm height, 575 g|
| Input Voltage: ||+9 to +36 VDC|
| Power Consumption: ||1.4W (typical) |
| Com Ports: ||2 RS-232 at up to 19,200 baud|
| Operating Temperature:|| -30°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|| 75 cm RMS |
|L1 Carrier Phase||1 cm RMS|
Data Rates:|| Measurements|| 10 Hz|
| Position|| 5 Hz||
Time to First Fix:|| Cold Start|| 120 s|
Warm Start|| 45 s|
Hot Start|| 15 s|
| Signal Reacquisition: ||<1 s typical
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