Measurements of the 492 GHz Atmospheric Opacity at Pampa la Bola and Rio Frio in Northern Chile

Publications of the Astronomical Society of Japan

Kohno, Kotaro¹  Yamamoto, Satoshi²  Kawabe, Ryohei¹  Sekimoto, Yutaro²  Hirota, Tomoya²  Nakai, Naomasa¹ 

[1] Nobeyama Radio Observatory, Minamimaki-mura, Minamisaku-gun, Nagano 384-1305;Department of Physics and Research Center for the Early Universe, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033 E-mail(TH):

关键词: "Earth: atmosphere";    Instruments;    Interferometers;   

DOI  :  10.1093/pasj/50.1.155

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

Wehavedevelopedatransportable492GHztippingradiometertomeasuretheatmosphericopacityatpotentialsitesforfutureground-basedastronomicalobservationsinthesubmillimeter-waveband.Withthisradiometer,wemeasuredtheatmosphericopacityattwositesinnorthernChile,PampalaBola(elevation4800m)andRioFrio(elevation4100m),eachforafewdays.The492GHzopacitymostlyrangedfrom0.5to1.5duringthemeasurements.The220GHzopacitywasalsomeasuredatthesametime.The492GHzopacitycorrelateswellwiththe220GHzopacity,theratiobetweenthe492and220GHzopacitiesbeing21.2±0.4.Thisresultsupportsthestandardatmosphericmodel,andcanbeusedtoevaluatetheobservablefractionoftimeforsubmillimeter-waveobservationsonthebasisofthelong-term220GHzopacitydata.

【 授权许可】

Unknown