Editing Extremely high frequency (section)

=== Scientific research ===
[[File:The Atacama Compact Array.jpg|thumb|Part of the [[Atacama Large Millimeter Array]] (ALMA), [[Chile]], [[America]], a millimeter wave [[radio telescope]]]]
This [[band (radio)|band]] is commonly used in [[radio astronomy]] and [[remote sensing]]. Ground-based radio [[astronomy]] is limited to high altitude sites such as [[Kitt Peak]] and Atacama Large Millimeter Array ([[Atacama Large Millimeter Array|ALMA]]) due to atmospheric absorption issues.

Satellite-based [[remote sensing]] near 60&nbsp;GHz can determine temperature in the [[upper atmosphere]] by measuring radiation emitted from oxygen molecules that is a function of temperature and pressure. The [[International Telecommunication Union]] non-exclusive passive frequency allocation at 57–59.3&nbsp;GHz is used for atmospheric monitoring in meteorological and climate sensing applications and is important for these purposes due to the properties of oxygen absorption and emission in Earth's atmosphere. Currently operational U.S. satellite sensors such as the [[Advanced Microwave Sounding Unit]] (AMSU) on one NASA satellite (Aqua) and four NOAA (15–18) satellites and the [[special sensor microwave/imager]] (SSMI/S) on Department of Defense satellite F-16 make use of this frequency range.<ref name="Comments of IEEE Geoscience and Remote Sensing Society, FCC RM-11104, 10/17/07">[http://gullfoss2.fcc.gov/prod/ecfs/retrieve.cgi?native_or_pdf=pdf&id_document=6519741794 FCC.gov]{{Dead link|date=August 2019 |bot=InternetArchiveBot |fix-attempted=yes }}, Comments of IEEE Geoscience and Remote Sensing Society, FCC RM-11104, 10/17/07</ref>