J/AJ/114/2822 Seeing Tests for NPOI Project (Hutter+ 1997)
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 1997AJ....114.2822H
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:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table.dat 39 42508 Seeing measurements
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
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
--------------------------------------------------------------------------------
Note (1): a: 'Unit A' seeing monitor
b: 'Unit B' seeing monitor
v: 1.55 m NOFS telescope
--------------------------------------------------------------------------------
Origin: AAS CD-ROM series, Volume 9, 1997 Lee Brotzman [ADS] 04-Nov-1997
(End) Patricia Bauer [CDS] 05-Feb-1998