Results 31 to 40 of about 781,821 (303)
A comparative study of GPS ionospheric scintillations and ionogram spread F over Sanya [PDF]
Annales Geophysicae, 2015 We analyze the data recorded during December 2011–November 2012 by a digital ionosonde and a GPS (Global Positioning System) scintillation and (total electron content) TEC receiver collocated at Sanya (109.6° E, 18.3° N; dip lat.
Y. Zhang +12 more
doaj +1 more source
Exact and asymptotic solutions of the call auction problem [PDF]
, 2014 The call auction is a widely used trading mechanism, especially during the opening and closing periods of financial markets. In this paper, we study a standard call auction problem where orders are submitted according to Poisson processes, with random ...
Toke, Ioane Muni
core +6 more sources
Observations of Unusual Daytime Range Spread F at Middle Latitude During the Afternoon Hours
Space Weather, 2021 In this study, an unusual daytime range spread F event recorded by the ionosonde installed at Zhangye (ZHY, 39.4°N, 100.13°E, dip latitude 29.65°N) station during the afternoon of December 23, 2016 was presented.
Lehui Wei +10 more
doaj +1 more source
Remote Sensing, 2021 This study presents observations of nighttime spread F/ionospheric irregularities and spread Es at low and middle latitudes in the South East Asia longitude of China sectors during the recovery phase of the 7–9 September 2017 geomagnetic storm.
Lehui Wei +7 more
doaj +1 more source
The statistical properties of spread F observed at Hainan station during the declining period of the 23rd solar cycle [PDF]
, 2010 The temporal variations of the low latitude nighttime spread F (SF) observed by DPS-4 digisonde at low latitude Hainan station (geog. 19.5° N, 109.1° E, dip lat. 9.5° N) during the declining solar cycle 23 from March 2002 to February 2008 are studied.
G. J. Wang +5 more
core +1 more source
On the Dynamics of Equatorial Spread F [PDF]
Australian Journal of Physics, 1974 A theory is proposed to explain the occurrence of spread F in the equatorial ionosphere. It is envisaged as a multistage process involving: movement of ionization drift with atmospheric gravity waves that results in spatial resonance, consequent ...
openaire +1 more source
Studies of ionospheric F-region response in the Latin American sector during the geomagnetic storm of 21–22 January 2005 [PDF]
, 2011 In the present investigation, we have studied the response of the ionospheric F-region in the Latin American sector during the intense geomagnetic storm of 21–22 January 2005. This geomagnetic storm has been considered "anomalous" (minimum Dst reached
A. J. de Abreu +10 more
core +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source
Daytime Equatorial Spread F‐Like Irregularities Detected by HF Doppler Receiver and Digisonde
Space Weather, 2021 Daytime equatorial spread F (ESF) is not as common as nighttime ESF due to the presence of a highly conducting E‐layer during the daytime which counteracts the development of F‐layer plasma irregularities.
B. Olugbon +6 more
doaj +1 more source
Climatology of Spread F over Tucumán from Massive Statistical Analysis of Autoscaled Data
Atmosphere, 2021 Automatic ionogram interpretation methods developed for real-time ionospheric monitoring can be applied in retrospective studies to analyze large quantities of data. The Autoscala software, implemented for such a purpose, includes a routine for automatic
Carlo Scotto, Dario Sabbagh
doaj +1 more source