Results 11 to 20 of about 499 (244)

Methodology for the Observations of Stellar Occultations by Small Bodies of the Solar System

Journal of Astronomy and Space Sciences, 2021
The observation of stellar occultations constitutes one of the most important techniques for determining the dimensions and establishing the physical parameters of small Solar System bodies.
Luis E. Salazar-Manzano, Edwin A. Quintero   +1 more
doaj   +1 more source

Retrieval of ozone profiles from GOMOS limb scattered measurements [PDF]

Atmospheric Measurement Techniques, 2011
The GOMOS (Global Ozone Monitoring by Occultation of Stars) instrument on board the Envisat satellite measures the vertical composition of the atmosphere using the stellar occultation technique. While the night-time occultations of GOMOS have been proven
S. Tukiainen, E. Kyrölä, P. T. Verronen, D. Fussen, L. Blanot, G. Barrot, A. Hauchecorne, N. Lloyd   +7 more
doaj   +1 more source

Direct comparisons of GOMOS and SAGE III NO₃ vertical profiles [PDF]

Atmospheric Measurement Techniques, 2012
In this paper, we present the first global comparisons between the two unique satellite-borne data sets of nitrogen trioxide (NO3) vertical profiles retrieved from the GOMOS (Global Ozone Monitoring by the Occultation of Stars) stellar occultations and ...
J. R. Moore, E. Kyrölä, J. Tamminen, J. Hakkarainen   +3 more
doaj   +1 more source

The FengYun-3C radio occultation sounder GNOS: a review of the mission and its early results and science applications [PDF]

Atmospheric Measurement Techniques, 2018
The Global Navigation Satellite System (GNSS) Occultation Sounder (GNOS) is one of the new-generation payloads on board the Chinese FengYun 3 (FY-3) series of operational meteorological satellites for sounding the Earth's neutral atmosphere and ...
Y. Sun, Y. Sun, Y. Sun, W. Bai, W. Bai, W. Bai, C. Liu, C. Liu, Y. Liu, Q. Du, Q. Du, Q. Du, X. Wang, X. Wang, G. Yang, M. Liao, Z. Yang, X. Zhang, X. Meng, X. Meng, D. Zhao, D. Zhao, J. Xia, J. Xia, Y. Cai, Y. Cai, G. Kirchengast, G. Kirchengast, G. Kirchengast   +28 more
doaj   +1 more source

Analysis of ionospheric structure influences on residual ionospheric errors in GNSS radio occultation bending angles based on ray tracing simulations [PDF]

Atmospheric Measurement Techniques, 2018
The Global Navigation Satellite System (GNSS) radio occultation (RO) technique is widely used to observe the atmosphere for applications such as numerical weather prediction and global climate monitoring.
C. Liu, C. Liu, G. Kirchengast, G. Kirchengast, G. Kirchengast, G. Kirchengast, Y. Sun, Y. Sun, Y. Sun, K. Zhang, K. Zhang, R. Norman, M. Schwaerz, M. Schwaerz, W. Bai, W. Bai, W. Bai, Q. Du, Q. Du, Y. Li   +19 more
doaj   +1 more source

OBSERVATION OF ASTEROID OCCULTATIONS WITH HELP OF THE METHOD OF TEMPORAL UNSQUEEZING CCD-IMAGES IN 2006

Odessa Astronomical Publications, 2017
Description of the method of temporal unsqueezing CCD-images is presented for observations of asteroids occultations. The method was applied for observations of 9 asteroid occultations with telescope AZT - 8 (D = 0.7m, F = 2.8m) and CCD ST - 8MXE in ...
F. I. Kravtsov, I. V. Lukyanyk
doaj   +1 more source

Validation of GOMOS ozone precision estimates in the stratosphere [PDF]

Atmospheric Measurement Techniques, 2014
Accurate information about uncertainties is required in nearly all data analyses, e.g., inter-comparisons, data assimilation, combined use. Validation of precision estimates (viz., the random component of estimated uncertainty) is important for remote ...
V. F. Sofieva, J. Tamminen, E. Kyrölä, A. Laeng, T. von Clarmann, F. Dalaudier, A. Hauchecorne, J.-L. Bertaux, G. Barrot, L. Blanot, D. Fussen, F. Vanhellemont   +11 more
doaj   +1 more source

Assimilation of GPS radio occultation data at DWD [PDF]

Atmospheric Measurement Techniques, 2011
We describe the status of the assimilation of bending angles from GPS radio occultations in the 3D-Var for DWD's operational global forecast model GME ("Global Model for Europe").
H. Anlauf, D. Pingel, A. Rhodin
doaj   +1 more source

Occult metastasis

Biomedicine & Pharmacotherapy, 2001
The most important factor affecting the outcome of patients with invasive cancers is whether the tumor has spread, either regionally (to regional lymph nodes) or systemically. However, a proportion of patients with no evidence of systemic dissemination will develop recurrent disease after primary 'curative' therapy.
D, Hawes, A M, Neville, R J, Cote
openaire   +2 more sources

Refractive Index Quality Control and Comparative Analysis of Multi-source Occultation Based on Sounding Observation

应用气象学报, 2020
Three occultation refractive index data of COSMIC, Metop-A and FY-3C from 1 September 2017 to 31 August 2018 are divided into four climate zones according to climate characteristics, so that the dataset is more consistent with the normal distribution ...
Guo Qiyun, Yang Rongkang, Cheng Kaiqi, Li Changxing   +3 more
doaj   +1 more source