Additional Atmospheric Opacity Measurements at Millimeter Wavelengths from San Pedro Mártir Sierra in Baja California
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Universidad Nacional Autónoma de México
2003
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| _version_ | 1876431580495347712 |
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| author | D. Hiriart |
| author_facet | D. Hiriart |
| contents | Additional Atmospheric Opacity Measurements at Millimeter Wavelengths from San Pedro Mártir Sierra in Baja California D. Hiriart Física, Astronomía y Matemáticas SITE TESTING ATMOSPHERIC EFFECTS Measurements of the atmospheric zenith opacity at a wavelength of 1.4mm(210 GHz) carried out at the Observatorio Astronómico Nacional in the Sierra SanPedro Mártir, Baja California, México are presented. The data cover 251 daysin 1999. Measurements were made on a continuous basis every eight minutes usinga heterodyne radiometer. For this period, the total mean zenith opacity was0.13 nepers; with mean values of total opacity for night time and day time of 0.14and 0.12 nepers. The data presented here supplement those covering 210 days in1992 (Hiriart et al. 1997). That year, a total mean sky opacity of 0.24 nepers at afrequency of 215 GHz was found. The present results confirm that measurements in1992 were affected by El Niño activity. By comparing the results of 1999 with similarmeasurements made at Kitt Peak and Mount Graham observatories in the sameyear, it is found that the North American monsoon that increases the sky opacityat millimeter wavelength lasted two months less in Baja than in southwestern USA. 2003 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57139111 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.39 |
| format | Artículo científico |
| id | redalyc_57139111 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Additional Atmospheric Opacity Measurements at Millimeter Wavelengths from San Pedro Mártir Sierra in Baja California D. Hiriart Física, Astronomía y Matemáticas SITE TESTING ATMOSPHERIC EFFECTS Additional Atmospheric Opacity Measurements at Millimeter Wavelengths from San Pedro Mártir Sierra in Baja California D. Hiriart Física, Astronomía y Matemáticas SITE TESTING ATMOSPHERIC EFFECTS Measurements of the atmospheric zenith opacity at a wavelength of 1.4mm(210 GHz) carried out at the Observatorio Astronómico Nacional in the Sierra SanPedro Mártir, Baja California, México are presented. The data cover 251 daysin 1999. Measurements were made on a continuous basis every eight minutes usinga heterodyne radiometer. For this period, the total mean zenith opacity was0.13 nepers; with mean values of total opacity for night time and day time of 0.14and 0.12 nepers. The data presented here supplement those covering 210 days in1992 (Hiriart et al. 1997). That year, a total mean sky opacity of 0.24 nepers at afrequency of 215 GHz was found. The present results confirm that measurements in1992 were affected by El Niño activity. By comparing the results of 1999 with similarmeasurements made at Kitt Peak and Mount Graham observatories in the sameyear, it is found that the North American monsoon that increases the sky opacityat millimeter wavelength lasted two months less in Baja than in southwestern USA. 2003 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57139111 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.39 |
| title | Additional Atmospheric Opacity Measurements at Millimeter Wavelengths from San Pedro Mártir Sierra in Baja California |
| topic | Física, Astronomía y Matemáticas SITE TESTING ATMOSPHERIC EFFECTS |
| url | https://www.redalyc.org/articulo.oa?id=57139111 |