Editing Very Long Baseline Array (section)

==High-Sensitivity Array==
The use of the VLBA can be scheduled dynamically, and its sensitivity can be improved by a factor of five by including other radio telescopes such as the [[Green Bank Telescope]] in West Virginia, the [[Very Large Array]] (VLA) in New Mexico and the [[Effelsberg 100-m Radio Telescope|Effelsberg radio telescope]] in Germany. These three additional sites are brought online for as much as 100 hours per four-month trimester. In this configuration, the entire array is known as the '''High-Sensitivity Array''' ('''HSA''').<ref>{{cite web|url=https://science.nrao.edu/facilities/vlba/HSA|title=High Sensitivity Array -- Science Website|first1=Amy|last1=Mioduszewski|first2=Justin|last2=Linford|date=2020-12-01|publisher=National Radio Astronomy Observatory|url-status=live|archive-url=https://web.archive.org/web/20210124220136/https://science.nrao.edu/facilities/vlba/HSA|archive-date=2021-01-24}}</ref> The [[Arecibo Observatory|Arecibo radio telescope]] in Puerto Rico was also used, before it collapsed.

{| class="wikitable"
|+High-Sensitive Array locations
!scope="col"| [[Toponymy|Toponym]]
!scope="col"| [[U.S. state|State]]
!scope="col"| [[Geographic coordinate system]]
|-----
!scope="row"| [[Green Bank, West Virginia|Green Bank]]
| [[West Virginia]]
| {{coord|38|25|59|N|79|50|23|W}}
| GB
|-----
!scope="row"| [[Very Large Array]]
| [[New Mexico]]
| {{coord|34|04|44|N|107|37|06|W}}
| Y27
|-----
!scope="row"| [[Effelsberg]]
| [[Germany]]
| {{coord|50|31|30|N|6|53|00|E}}
| EB
|}