PALFA Survey - définition. Qu'est-ce que PALFA Survey
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Qu'est-ce (qui) est PALFA Survey - définition


PALFA Survey         
  • Sky coverage map of the PALFA survey as of July 8, 2014
  • Galactic location of the new P-ALFA pulsar survey discoveries. The center of the Galaxy is indicated by the center of the coordinates, the position of the Solar System is indicated by the red dot on the left. The PALFA search areas are indicated in light blue. The dots indicate pulsars, this time colored according to their DM. The new PALFA discoveries are indicated by the larger dots.
  • Sky map in Galactic coordinates showing (in green) the portions of the Galactic plane being targeted by the PALFA survey. This region corresponds to most of the Galactic plane visible with the Arecibo telescope. The dots correspond to known pulsars, their color indicates their inferred distance.
PALFA is a large-scale survey for radio pulsars at 1.4 GHz using the Arecibo 305-meter telescope and the ALFA multibeam receivers.
Survey vessel         
  • oceanographic]] research, June 2011
  • Clintons ''Northern Storm'' in the harbour of [[Ystad]] 7 July 2021.
  • Hydrographic vessel Marshal Gelovani
TYPE OF RESEARCH VESSEL
Survey ship; Survey ships; Autonomous survey vessel
A survey vessel is any type of ship or boat that is used for underwater surveys, usually to collect data for mapping or planning underwater construction or mineral extraction. It is a type of research vessel, and may be designed for the purpose, modified for the purpose or temporarily put into the service as a vessel of opportunity, and may be crewed, remotely operated, or autonomous.
Geological survey         
SYSTEMATIC INVESTIGATION OF THE GEOLOGY IN A REGION FOR THE PURPOSE OF CREATING A GEOLOGICAL MAP OR MODEL
Geological Survey; National Geological Survey; Geological surveys
A geological survey is the systematic investigation of the geology beneath a given piece of ground for the purpose of creating a geological map or model. Geological surveying employs techniques from the traditional walk-over survey, studying outcrops and landforms, to intrusive methods, such as hand augering and machine-driven boreholes, to the use of geophysical techniques and remote sensing methods, such as aerial photography and satellite imagery.