Automatic picture transmission: Difference between revisions

Latest revision as of 21:49, 13 January 2024

(Abbreviated APT.) Low-resolution analog transmission of AVHRR data from polar orbiting satellites.

Two channels of reduced-resolution (4 km) data are continuously transmitted using analog VHF signals (137 MHz) at reduced rates (120 lines per minute), allowing use of simple, low-cost ground station equipment for APT reception. APT was initiated with the TIROS satellite launched in December 1963.

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+{{Term
+|Display title=automatic picture transmission
-{{TermHeader}}
+|Definitions={{Definition
-{{TermSearch}}
+|Num=1
+|Meaning=(Abbreviated APT.) Low-[[resolution]] analog transmission of [[AVHRR]]  data from polar orbiting satellites.
-<div class="termentry">
+|Explanation=Two channels of reduced-resolution (4 km) data are continuously transmitted using [[analog]]  VHF signals (137 MHz) at reduced rates (120 lines per minute), allowing use of simple, low-cost  ground [[station]] equipment for APT reception. APT was initiated with the [[TIROS]] satellite launched  in December 1963.
-  <div class="term">
+}}
-== automatic picture transmission ==
+}}
-  </div>
-<div class="definition"><div class="short_definition">(Abbreviated APT.) Low-[[resolution]] analog transmission of [[AVHRR]]  data from polar orbiting satellites.</div><br/> <div class="paragraph">Two channels of reduced-resolution (4 km) data are continuously transmitted using [[analog]]  VHF signals (137 MHz) at reduced rates (120 lines per minute), allowing use of simple, low-cost  ground [[station]] equipment for APT reception. APT was initiated with the [[TIROS]] satellite launched  in December 1963.</div><br/> </div>
-</div>
-{{TermIndex}}
-{{TermFooter}}
-[[Category:Terms_A]]