فارسي | English
  About Us | About Iran | Contact Us | Staff Info[Geoportal Info] [Maps] [Mining Info] [Other Activities]  
 
  News | Events | Photo Gallery | Downloads | Links | Kids  Search    Region    Scale    Subject   :Access to information by   Home | Newest   
 
Search With:
Glossary
  
 About Glossary
 [Page 1 to 11] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] Next
  Results 1 to 10 of 106
Words List   (R)
NextLast
   radar  
Subject: The Earth
    An electronic instrument used to detect objects such as falling precipitation by their ability to reflect and scatter microwaves back to the receiver. It is an acronym that stands for "RAdio Detecting And Ranging".
 
 
  
   Radial fault  
Subject: Geology
    one of a group of faults that radiate from a central point. Reference: Bates, R.L. & J.A.Jackson, GLOSSARY OF GEOLOGY, Second Edition, American Geology Institute, 1980
 
 
  
   Radial pattern  
Subject: Geology
    A system of streams runČning in all directions away from a central elevated structure, such as a volcano. Reference:Tarbouk, E.J. & F.K. Lutgens, (2006), EARTH, 8th edition, Pearson Education International.
 
 
  
   radial velocity   
Subject: The Earth
    Component of motion toward or away from a given location. As "seen" by Doppler radar, it is the component of motion parallel to the radar beam. (The component of motion perpendicular to the beam cannot be seen by the radar. Therefore, strong winds blowing strictly from left to right or from right to left, relative to the radar, cannot be detected.).
 
 
  
   radiant energy (radiation)  
Subject: The Earth
    Energy propagated in the form of electromagnetic waves. These waves do not need molecules to propagate them, and in a vacuum they travel at nearly 300,000 km per sec.
 
 
  
   radiant flux density   
Subject: The Earth
    The total flow of radiation received on a unit area of a given real or imaginary surface. Also called the irradiance.
 
 
  
   radiation balance   
Subject: The Earth
    The difference between the absorbed solar radiation and the net infrared radiation. Experimental data show that radiation from the earth's natural surfaces is rather close to the radiation from a black body at the corresponding temperature; the ratio of the observed values of radiation to black body radiation is generally 0.90-1.0.
 
 
  
   radiation fog  
Subject: The Earth
    Fog produced over land when radiational cooling reduces the air temperature to or below its dew point. It is also known as ground fog and valley fog.
 
 
  
   radiation inversion  
Subject: The Earth
    An increase in temperature with height due to radiational cooling of the earth's surface. Also called a nocturnal inversion.
 
 
  
   radiational cooling  
Subject: The Earth
    The process by which the earth's surface and adjacent air cool by emitting infrared radiation.
 
 
  
NextLast
 
 
Publications  Library
Glossary  Papers
 
 
 
 
FAQ  Members
Job Offer  Training
 
 
 
 
• Medical Geology Database 
• Geological Atlas of Roads 
• Marine Geology 
• Geography information 
• Mines and Deposits of Iran 
• Land Geophysics Database- Iran 
• Landslide Database of Iran 
• Exploration Area DB 
• Copper Database 
• Gold Database  
• Geoscience Laboratories 
• Mineral Information 
• Bibliographic Database 
• Geochemistry Database 
• Earthquake database 
• Abandoned mines DB of Iran 
• Mineral processing database 
• Minerals database 
 
 
 
 
Login Name:
Password:
Sign Up for membership ]
 
 
 
   Others Activities:• Geoscience database of ALBA • Geoscience Database of ECO • GEOLOGICAL SURVEY OF IRAN 
• Tajikistan Geoscience Database • Geo Database of Venezuela • 4th National Development Plan • Foreign Investment(FIPPA) 
• The general policies (Mines) • 26th Symposium on Geosciences • Ongoing projects   
 
 
Maps:• Map of Iran's Earthquake • Distribution Map of mineral Processing Plants 
• Mineral Distribution Map of Iran • Geosciences laboratories distribution map of Iran • Orohydrographic Map of Iran 
• Select state on iran map • Geological Map of Iran(1:1000, 000 Scale) • 2500 K Magnetic Lineament Map of Iran 
    
 
Best viewed:1024*768
National Geoscience Database Of IRAN
URL:www.ngdir.ir
Contact Mail:Info@ngdir.ir
 
 
 Search with:           
Designed by Payvand Software Group  Privacy | Copyright | Disclaimer