| name |
description |
source |
version |
status |
| |
|
ref _source .name |
ref _epicentre _version .name |
|
| geophone |
A seismographic device for use on land, generally electromagnetic in nature, that converts the motion of the earth into electric signals. |
POSC |
2.1 |
current |
| hydrophone |
A seismographic device for use in water, generally piezoelectric or magnetostrictive in nature, that generate a voltage proportional to the instantaneous water pressure. |
POSC |
2.1 |
current |
| air gun |
A device used in marine surveys to generate a seismic signal by means of compressed air. |
POSC |
2.1 |
current |
| water gun |
A device used in marine surveys to generate a seismic signal by means of a rapidly moving jet of water. |
POSC |
2.1 |
current |
| sleeve exploder |
A device used in marine surveys to generate a seismic signal by the rapid expansion on a rubber tube containing an explosive mixture of volitile gases. |
POSC |
2.1 |
current |
| sparker |
A device used in shallow marine surveys to generate a seismic signal by means of a electrical discharge. |
POSC |
2.1 |
current |
| explosive sources |
A device used in land surveys to generate a seismic signal by the detonation of an explosive material such as dynamite or primacord. |
POSC |
2.1 |
current |
| land air gun |
A device used in land surveys to generate a seismic signal by using compressed air to drive a pan against the ground. |
POSC |
2.1 |
current |
| vibrator |
A device used in land surveys to generate a seismic signal by the hydraulically produced motion of a large mass. |
POSC |
2.1 |
current |
| land vehicle |
A seismograph system for use in land surveys mounted on a truck or other land vehicle. |
POSC |
2.1 |
current |
| marine vessel |
A seismograph system for use in marine surveys mounted aboard a marine vessel. |
POSC |
2.1 |
current |
| swamp buggy |
A seismograph system mounted on a land vehicle specifically designed for use in swamps or marshes. |
POSC |
2.1 |
current |
| barge |
A seismograph system for use in shallow water marine survey, mounted aboard a floating platform which is towed into place by another vessel. |
POSC |
2.1 |
current |
| magnetic compass |
A device that measures the direction of and angles from magnetic north. |
POSC |
2.1 |
current |
| gyroscopic compass |
A device that measures the direction of and angles relative to the earth rotational axis North pole. |
POSC |
2.1 |
current |
| depth sensor |
A device that measures its depth of immersion below the surface of a liquid. |
POSC |
2.1 |
current |
| pitch-roll-heave sensor |
A device that measures angular (pitch and roll) and vertical (heave) displacements of a ship in response to sea waves. (Spradley, "Surv. & Nav. for Geoph. Expl.") |
POSC |
2.1 |
current |
| echo sounder |
A device that measures depth to water bottom from a transducer in the bottom of a ship hull. (Spradley, "Surv. & Nav. for Geoph. Expl.") |
POSC |
2.1 |
current |
| ultra short base line |
A device that measures travel times and hence distances between high frequency sensors deployed around survey ships and their towed equipment. |
POSC |
2.1 |
current |
| name |
description |
source |
version |
status |
| laser range finder |
A device that measures laser beam travel times, and hence distances, between transmitters and receivers, some involving one-way paths, others with two-way paths. |
POSC |
2.1 |
current |
| acoustic range finder |
A device that measures acoustic travel times, and hence distances, between transmitters and receivers, some involving one-way paths, others with two-way paths. |
POSC |
2.1 |
current |
| theodolite |
A device that measures angles and subtended lengths in orientable directions, usually in the earth's horizontal plane and perpendicular thereto. |
POSC |
2.1 |
current |
| fluxgate magnetometer |
A device which allows the user to find the orientation in three dimensions of the local magnetic field by measuring the difference in magnetic flux between two gates. (Spradley, "Surv. & Nav. for Geoph. Expl.") |
POSC |
2.1 |
current |
| planetable and alidade |
The plane table is a drawing board attached to a tripod by means of a pivoting head. An alidade is a small telescope with a moveable base, a scale for measuring vertical angles and a magnetic compass for aligning the instrument. The base has a straightedge aligned parallel to the barrel of the telescope. Some method for measuring horizontal distance is also usually built into the device. (Spradley, "Surv. & Nav. for Geoph. Expl." ) |
POSC |
2.1 |
current |
| loran receiver |
A system of long-range navigation in which pulsed signals sent out by two pairs of radio stations are used by navigators to determine the geographical position of an object. |
POSC |
2.1 |
current |
| doppler sonar |
A device used in dead-reckoning navigation that uses the Doppler effect to measure the velocity of a vessel by bouncing sonar waves off the ocean bottom in four directions. (Spradley, "Surv. & Nav. for Geoph. Expl." ) |
POSC |
2.1 |
current |
| doppler satellite |
A method of location measurement based on signals broadcast from an orbiting satellite. (Spradley, "Surv. & Nav. for Geoph. Expl.") |
POSC |
2.1 |
current |
| GPS |
Geographic Position System. It measures latitude, longitude, z based on a pseudo-range, carrier phase measurement. The orbit scheme is high altitude, inclined. |
POSC |
2.1 |
current |
| Transit |
It measures latitude, longitude, x, y, z, based on a doppler frequency shift. The orbit scheme is low altitude, polar. |
POSC |
2.1 |
current |
| Glonass |
It measures latitude, longitude, based on a pseudo-range, carrier phase measurement. The orbit scheme is high altitude, inclined. |
POSC |
2.1 |
current |
| Starfix |
It measures latitude, longitude, based on a range measurement. The orbit scheme is geostationary. |
POSC |
2.1 |
current |
| land drilling rig |
The most common land drilling rig using a rotating drill pipe, fastened to the bottom of which is a bit or cutting tool. |
POSC |
2.1 |
current |
| cable-tool |
A previously common type of land drilling rig using a heavy, sharp-pointed bit which is continuously raised and dropped in the hole. |
POSC |
2.1 |
current |
| slimhole |
A rig specifically designed to drill with less than normal diameter tools, i.e., less than a 7 7/8 inch rotary bit. |
POSC |
2.1 |
current |
| slanthole |
A rig specifically designed to drill a borehole that is non-vertical at the surface. |
POSC |
2.1 |
current |
| heli-rig |
A rig constructed so as to be deliverable on-site via cargo helicopter. |
POSC |
2.1 |
current |
| inland barge |
A drilling rig built on a barge for use in inland lakes, rivers and wetlands. |
POSC |
2.1 |
current |
| ski |
A drilling rig built into the facilities of an offshore platform or other multi-slot facility with the ability to skid efficiently from slot to slot. |
POSC |
2.1 |
current |
| sub barge |
A drilling rig built on a barge for use in shallow water. Once the barge is on-site, compartments in the barge are flooded, allowing it to settle, partially submerged, on the water bottom. |
POSC |
2.1 |
current |
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