World Library  
Flag as Inappropriate
Email this Article

J band

Article Id: WHEBN0003142229
Reproduction Date:

Title: J band  
Author: World Heritage Encyclopedia
Language: English
Subject: List of nearest stars and brown dwarfs, BEL Battle Field Surveillance Radar, Radio spectrum, MWband/doc, K band
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

J band


J band can refer to three different regions of the electromagnetic spectrum, in the radio and near-infrared.

Contents

  • NATO 1
    • Uses 1.1
  • JRC 2
  • Infrared astronomy 3
  • References 4

NATO

The NATO J band is the range of NATO for electronic countermeasure (ECM) applications.[1][2] This is equivalent to wavelengths between 3 and 1.5 centimetres (1.18 and 0.59 in).

The J band is a subset of the SHF band as defined by the ITU.[3] The J band intersects with the X band and K band of the older IEEE classification system.[4] The Ku band is within the J band.[4]

Uses

The J band is used for satellite communications and radar, the latter being central to aircraft systems and their avionics. Satellite communications systems can be used in conjunction with aircraft to help locate and identify enemy targets or provide a role as a reconnaissance platform for soldiers on the ground.

JRC

In the United Kingdom, the term "J Band" is also used by the Joint Radio Company to refer to their VHF communications band at 139.5-140.5 and 148-149 MHz used by fuel and power industries.[5]

Infrared astronomy

Atmospheric windows in the infrared. The J band is the transmission window centred on 1.25 micrometres

In infrared astronomy, the J band refers to an atmospheric transmission window centred on 1.25 micrometres (in the near-infrared). Betelgeuse is the brightest near-IR source in the sky with a J band magnitude of -2.99.[6] The next brightest stars in the J band are R Doradus (-2.6), Arcturus (-2.2), and Aldebaran (-2.1).[7] In the J band Sirius is the 9th brightest star.

References

  1. ^
  2. ^
  3. ^
  4. ^ a b
  5. ^ Joint Radio Company
  6. ^
  7. ^
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.