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Seeing Tests for NPOI Project
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... -
Mesospheric sodium properties
The performance of laser guide star adaptive optics (AO) systems for large optical and infrared telescopes is acted by variability of the sodium layer, located at altitudes... -
La2010: orbital solution for long term Earth motion
We present here a new solution for the astronomical computation of the orbital motion of the Earth spanning from 0 to -250Myr. The main improvement with respect to our previous... -
Evolution of solar irradiance during Holocene
Long-term records of solar radiative output are vital for understanding solar variability and past climate change. Measurements of solar irradiance are available for only the... -
Precession-nutation procedures (IAU 2006)
The 2006 IAU General Assembly has adopted the P03 model of Capitaine et al. (2003A&A...412..567C) recommended by the WG on precession and the ecliptic (Hilton et al., 2006,... -
Transformation between ICRS and ITRS
Based on the current IAU hierarchy of the relativistic reference systems, practical formulae for the transformation between barycentric (BCRS) and geocentric (GCRS) celestial... -
Terrestrial impact cratering rate
The most significant periodicities in the terrestrial impact crater record are due to the "human-signal": the bias of assigning integer values for the crater ages. This bias...
