2007
DOI: 10.2151/jmsj.85.495
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Ground-Based Millimeter-Wave Radiometer for Measuring the Stratospheric Ozone over Rikubetsu, Japan

Abstract: A millimeter-wave radiometer was installed at Rikubetsu, Japan (43.5 N, 143.8 E) in March 1999, to monitor the vertical distribution of ozone and temporal ozone variations in the stratosphere. Since November 1999, we have been monitoring vertical profiles of the ozone mixing ratio in the altitude range from 22 to 60 km, with measurements at 2-km altitude intervals. The systematic error was estimated to be 10%-15% positive above 28 km, and the total random error to be 5%-21%. Comparisons of the Rikubetsu rad… Show more

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Cited by 9 publications
(8 citation statements)
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“…The operation timeline of the instrument is listed in Table 1. The details of the instrument until October 2005 are described in Nagahama et al (2007), and we present the changes that were made after October 2005. As for the receiver, a tunable SIS mixer was replaced with a sideband-separating SIS mixer (2SB mixer) made of two double sideband (DSB) mixers and two 90° hybrid couplers (Asayama et al 2004) in October 2005.…”
Section: Instrument and Observationmentioning
confidence: 99%
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“…The operation timeline of the instrument is listed in Table 1. The details of the instrument until October 2005 are described in Nagahama et al (2007), and we present the changes that were made after October 2005. As for the receiver, a tunable SIS mixer was replaced with a sideband-separating SIS mixer (2SB mixer) made of two double sideband (DSB) mixers and two 90° hybrid couplers (Asayama et al 2004) in October 2005.…”
Section: Instrument and Observationmentioning
confidence: 99%
“…The a priori uncertainties (square roots of the diagonal elements of S a ) of the O 3 profile were assumed to be 30 % of the mixing ratios at each altitude. The uncertainty was estimated from the variability (deviation from the 30-day average) of O 3 mixing ratio in the stratosphere in a short term (Nagahama et al 2004). The off-diagonal elements of the a priori covariance matrix were set to decrease exponentially with a correlation length of 6 km.…”
Section: Retrieval Analysismentioning
confidence: 99%
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“…Nowadays there are a few ground-based ozone radiometers sites in the world. Most of them are gathered under the international organization NDACC (Network for the Detection of Atmospheric Composition Change) with permanent instruments located at observation stations in NyAlesund (Spitsbergen) (Palm et al, 2010), Bern (Switzerland) (Studer et al, 2013), Payerne (Switzerland) (Maillard Barras et al, 2009), Mauna Loa (Hawaii), Lauder (New Zealand) and Rikubetsu (Japan) (Nagahama et al, 2007). In addition, other ozone radiometers are located in Thule (Greenland), Seoul (Korea), Kiruna (Sweden), Moscow (Russia) and in Antarctica.…”
Section: Published By Copernicus Publications On Behalf Of the Europementioning
confidence: 99%