The detectors are arranged in two independent boxes with an active area larger than 200×200 mm2 and a total water equivalent thickness along the beam path of about 0.9 mm.
For these limb-scanning spectrometers, the retrieved metal density is averaged over a path of about 100 km around the tangent point.
The local pressure at the first mesh in this case, for example, with a background vacuum pressure of 100 mTorr, was calculated to be about 10 Torr based on the data extracted from the simulations previously reported, corresponding to a mean free path of about 5.3 μm.
With choices within these two ranges, a path length of about 200 m is adequate, and greater path lengths, above 200 m, result in no substantial improvement in emission calculations.
With the latter, set to a path length of about 20 μm, the absorption by extremely intense lines is measured under appropriate (non saturating transmission) absorption conditions, regardless of the gas pressure.
In order to measure the fluorescence spectra and its decay profiles under the condition free from the reabsorption effect, we designed a thin optical cell with a path length of about 10 μm.
The recorded spectra, obtained for a path length of about 130 μm, have been adjusted using Voigt line-shapes in order to retrieve the unperturbed line positions, and the self-broadening and -shifting parameters induced by pressure for the P 20) to R(19) lines.
With an average path length of about three, the GSN is consistent with this prediction.
A double pass through the anterior eye segment and the vitreous body adds up to a path length of about 50 mm exhibiting wavelength-dependent dispersion and absorption.
At least 22 people were killed, most of them neighbors of Mr. Blackburn in the mobile home park, and hundreds were injured when a tornado tore across southwestern Indiana and northern Kentucky about 2 a.m. on Sunday, cutting a path of destruction about 20 miles long and three-quarters of a mile wide.
Successive prime ministers, he noted, have tried just about every approach to Pakistan over the last decade, from a middle path of "talking about talks" to a concerted effort at cooperation, to the current cold war.
