Results 11 to 20 of about 5,542,325 (204)
The Calibration of the 35–40 GHz Solar Radio Spectrometer with the New Moon and a Noise Source
The Astrophysical Journal Supplement Series, 2023 Calibrating solar radio flux has always been a concern in the solar community. Previously, fluxes were calibrated by matching load or the new Moon for relative calibration, and at times with the assistance of other stations’ data. Moreover, the frequency
ZiQian Shang +9 more
doaj +1 more source
Dispersion Characteristics of the Multi-mode Fiber-fed VIPA Spectrograph
The Astronomical Journal, 2023 A high-resolution ( ${ \mathcal R }\gt {10}^{5}$ ), multi-mode fiber-fed spectrograph on large telescopes with a reasonable size is desirable in astronomy.
Xiaoming Zhu +4 more
doaj +1 more source
Pulsar and Magnetar Navigation with Fermi/GBM and GECAM
The Astrophysical Journal Supplement Series, 2023 The determination of the absolute and relative position of a spacecraft is critical for its operation, observations, data analysis, scientific studies, as well as deep-space exploration in general.
Xi-Hong Luo +31 more
doaj +1 more source
The Transformational Power of Frequency Phase Transfer Methods for ngEHT
Galaxies, 2023 (Sub) mm VLBI observations are strongly hindered by limited sensitivity, with the fast tropospheric fluctuations being the dominant culprit. We predict great benefits from applying next-generation frequency phase transfer calibration techniques for the ...
María J. Rioja +2 more
doaj +1 more source
Astronomical site selection for Turkey using GIS techniques [PDF]
Experimental Astronomy, 2015 A site selection of potential observatory locations in Turkey have been carried out by using Multi-Criteria Decision Analysis (MCDA) coupled with Geographical Information Systems (GIS) and satellite imagery which in turn reduced cost and time and increased the accuracy of the final outcome. The layers of cloud cover, digital elevation model, artificial
Aksaker, N. +14 more
openaire +7 more sources
Parametric High Resolution Techniques for Radio Astronomical Imaging [PDF]
IEEE Journal of Selected Topics in Signal Processing, 2008 The increased sensitivity of future radio telescopes will result in requirements for higher dynamic range within the image as well as better resolution and immunity to interference. In this paper we propose a new matrix formulation of the imaging equation in the cases of non co-planar arrays and polarimetric measurements. Then we improve our parametric
Chen Ben-David, Amir Leshem
openaire +3 more sources
A Technology for Deblurring Astronomical Images [PDF]
, 2022 This paper focuses on a specific technology for deblurring astronomical images. Data are collected as digital matrices of image pixels. The technology reconstructs the object via computational manipulation of the blurred image.
Tidrick, Thomas H
core +1 more source
The 5.25 & 5.7 $\mu$m Astronomical Polycyclic Aromatic Hydrocarbon Emission Features [PDF]
, 2008 Astronomical mid-IR spectra show two minor PAH features at 5.25 and 5.7 $\mu$m (1905 and 1754 cm$^{\rm - 1}$) that hitherto have been little studied, but contain information about the astronomical PAH population that complements that of the major ...
Boersma, C. +6 more
core +1 more source
The Astrophysical Journal, 2023 The timing follow-up of newly discovered millisecond pulsars (MSPs) is hindered by the larger positional uncertainty (a few tens of arcminutes) associated with the discovery.
Shyam S. Sharma +5 more
doaj +1 more source
The Benefits of Using XML Technologies in Astronomical Data Retrieval and Interpretation [PDF]
, 2016 This paper describes a solution found during recent research that could provide improvements in the efficiency, reliability and cost of retrieving stored astronomical data.
Doicu, Adrian +69 more
core +2 more sources