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Attention:

Magnetic compensation flight procedures are required after each new installation of the magnetic sensors.

Summary

Magnetic measurements provide the direction of the geomagnetic field. Therefore, 2 Cesium Magnetometers are installed in a nose boom and a tail boom to the aircraft. In addition, a Fluxgate Magnetometer for attitude compensation is installed. The sensor system is controlled by an external unit (AADC II) mounted in a rack. Magnetic base stations with Overhauser magnetometers are used for ground reference of the airborne measurements.

Sensor-Info: aircraft:bt-67:magnetics, 6815


ManufacturerRMS Instruments, Scintrex Ltd., RMS Instruments
Modelsee subdevices
Serial No.n/a
Typemagnetometer



Contacts

NameInstitutionRole
Graeme EaglesAlfred-Wegener Institute of Polar and Marine ResearchDevice Contact

Available devices and Specifications

NameModelSerial Number
Automatic Aeromagnetic Digital CompensatorAADCII9903860
Cesium MagnetometerCS-39511042
Cesium MagnetometerCS-39503008
Cesium MagnetometerCS-39810135
Cesium MagnetometerCS-39808131
Cesium MagnetometerCS-31203404
Fluxgate MagnetometerTFM100G1E110
Fluxgate MagnetometerTFM100G1E999
Overhauser Magnetometer GSM-19GSM-1952498
Overhauser Magnetometer GSM-19GSM-1962673

Specifications of RMS Compensator AADC II (without mounting)

Dimension Compensator (L x W x H)

483 x 440 x 178 mm

Weight

12.5 kg

Power Supply

28 VDC

Data interface

serial interface (RS-232)


Specifications of CS-3 Scintrex Cesium Magnetometers (without mounting)

The CS-3 magnetometers are installed at the tips of the noseboom and the tailboom. Length of the noseboom from the tip of the aircraft is about 3.3 m.

Dimension Sensor Head (Diameter x L)

63 x 160 mm

Weight

1.15 kg

Dimension Sensor Electronics (Diameter x L

63 x 350 mm

Weight

1.5 kg

Power Supply

24 - 35 VDC


Specifications of Billingsley Fluxgate Magnetometer (without mounting)

Dimension Fluxgate (L x W x H)

83 x 35 x 32 mm

Weight

0.1 kg

Power Supply

15 - 34 VDC

Data interface

serial interface (RS-232)


Specifications of GEM Overhauser Magnetometer

Dimension Sensor (Diameter x L)

75 x 175 mm

Weight Sensor

1.0 kg

Dimension Console (L x W x H)

223 x 240 x 69 mm

Weight Sensor

2.1 kg

Data interface

serial interface (RS-232)


Position

Origin Description:CS-3 Cesium Magnetometers are mounted in a tail and a nose boom respectively. Additionally, a fluxgate magnetometer is mounted close to the aileron. Electronics are stored in a rack.

Data logging, storage and archiving

Logged parameter

ParameterSensor Output TypeUnit
magnetic field compensatedmagnetic fieldnT
magnetic field rawmagnetic fieldnT
magnetic field uncompensatedmagnetic fieldnT
magnetic field totalmagnetic fieldnT
magnetic field x-componentmagnetic fieldnT
magnetic field y-componentmagnetic fieldnT
magnetic field z-componentmagnetic fieldnT

Rawdata storage on board

During flight magnetometer data are stored within the aircraft onboard DMS system. Magnetic base stations record data independantly and continously.

Data archiving on land

After the flight CS-3 and Fluxgate magnetometer data are accessible via the land system of the aircraft data managment system (DMS). Base station data of the GEM Overhauser magnetometers are downloaded frequently and are made accessible via the external devices file system of the aircraft data managment system (DMS).

DMS

Module name

B707 Magnetic

Device name

Magnetic

Parameters

4DIF(F) front [nT]; 4DIF(R) rear [nT]; Compensated grad 1 [nT]; Compensated mag front [nT]; Compensated mag rear [nT]; Error code; ErrorText; Magnetic ASCII; Mode code; Scan Number [0.1 s]; Status; Total field (Fluxgate) [nT]; Uncompensated grad 1 [nT]; Uncompensated mag front [nT]; Uncompensated mag rear [nT]; X-component (Fluxgate) [nT]; Y-component (Fluxgate) [nT]; Z-component (Fluxgate) [nT]


Documentation





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