نتایج جستجو برای: density calibration
تعداد نتایج: 463947 فیلتر نتایج به سال:
Abstract Sensitive radio instruments are optimized for observing faint astronomical sources, and usually need to attenuate the received signal when Sun. There only a handful of flux density calibrators that can comfortably be observed with same attenuation setup as Additionally, wide field-of-view (FoV) like Murchison Widefield Array (MWA) calibrator observations generally done Sun is below hor...
in this thesis, structural, electronical, and optical properties of inverse pervskite(ca3pbo) in cubic phase have been investigated.the calculation have been done based on density functional theory and according to generalized gradiant approximate (gga) as correlating potential. in order to calculate the configurations, implementing in the wien2k code have been used from 2013 version. first of ...
Concerns over runoff water quality from agricultural lands and construction sites have led to the development of improved erosion control practices, including application of polyacrylamide (PAM). We developed a quick and reliable method for quantifying PAM in soil extracts at low carbon content by using a turbidimetric reagent, Hyamine 1622. Three high-molecular weight anionic PAMs differing in...
Ionospheric Calibration of Low Frequency Radio Interferometric Observations using the Peeling Scheme
Calibration of radio interferometric observations becomes increasingly difficult towards lower frequencies. Below ∼ 300 MHz, spatially variant refractions and propagation delays of radio waves traveling through the ionosphere cause phase rotations that can vary significantly with time, viewing direction and antenna location. In this article we present a description and first results of SPAM (So...
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