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J/AJ/114/2822                    Seeing Tests for NPOI Project (Hutter+ 1997)
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Seeing tests at four sites in support of the NPOI project
     Hutter D.J., Elias  II N.M., Peterson E.R., Weaver W.B., Weaver G.,
     Mozurkewich D., Vrba F.J., Simon R.S., Buscher D.F., Hummel C.A.
    <Astron. J. 114, 2822 (1997)>
    =1997AJ....114.2822H
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ADC_Keywords: Earth

Abstract:
    This paper reports astronomical seeing measurements made at four sites
    in the western United States during 1991-92. This study was conducted
    as part of the site selection process for the Navy Prototype Optical
    Interferometer. An extensive series of observations were made at Chews
    Ridge and Anderson Ridge, CA (~36,000 equivalent FWHM seeing
    estimates). Observations made from Chews Ridge over 49 nights yield an
    average FWHM seeing value of ~1.1", while those made from Anderson
    Ridge over 34 nights yield an average FWHM seeing of ~1.4". However,
    observations made from Anderson Ridge at a location away from any
    nearby trees indicate that more open sites in that area may enjoy
    seeing comparable to that measured at Chews Ridge. Simultaneous
    free-air, ground-level observations at the U.S. Naval Observatory's
    Flagstaff Station and at Anderson Mesa, both near Flagstaff, AZ, yield
    similar seeing values to each other (<=0.1" difference).

File Summary:
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  FileName        Lrecl  Records   Explanations
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ReadMe             80        .   This file
table.dat          39    42508   Seeing measurements
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Byte-by-byte Description of file: table.dat
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   Bytes Format    Units   Label     Explanations
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   1-  8  A8    "DD/MM/YY" Date      Observation date
      10  A1       ---     Tel       [abv] Telescope (1)
  12- 20  F9.6     h       UTC       UTC time of the observation
  22- 30  F9.6     deg     Gamma     Zenith angle of the observation
  32- 39  F8.6     arcsec  Seeing    Full-width-at-half-maximum (FWHM) seeing
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Note (1): a: 'Unit A' seeing monitor
          b: 'Unit B' seeing monitor
          v: 1.55 m NOFS telescope
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Origin: AAS CD-ROM series, Volume 9, 1997         Lee Brotzman [ADS] 04-Nov-1997
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(End)                                          Patricia Bauer [CDS]  05-Feb-1998