Results 11 to 20 of about 703 (173)
Multistation digisonde observations of equatorial spread F in South America [PDF]
Annales Geophysicae, 2004 Directional ionogram and F-region drift observations were conducted at seven digisonde stations in South America during the COPEX campaign from October to December 2002.
B. W. Reinisch +7 more
doaj +7 more sources
GPS TEC and ITEC from digisonde data compared with NEQUICK model [PDF]
Advances in Radio Science, 2004 At the Dourbes station, a digisonde 256 is colocated with a Turbo Rogue GPS receiver. Real time processing of the digisonde data gives the electron density profile and the ITEC value (SAO file) for each sounding.
J.-C. Jodogne +3 more
doaj +3 more sources
地球与行星物理论评To ensure the detection quality of the domestic model ionospheric digisonde adopted by the Phase II of Chinese Meridian Project, prototype testing including technique testing and a data quality comparison was performed.
Zhiqing Chen +5 more
doaj +2 more sources
On the nature of nighttime ionisation enhancements observed with the Athens Digisonde [PDF]
Annales Geophysicae, 2002 Abstract. True height electron density profiles observed with the Athens Digisonde were analyzed together with geomagnetic data indices for six magnetic storms in September and October 2000 in an effort to define the ionospheric structure during events of nighttime ionisation enhancements and to discuss the physical processes that may cause them.
I. Tsagouri, I. Tsagouri, A. Belehaki
core +9 more sources
Automated collection and dissemination of ionospheric data from the digisonde network [PDF]
Advances in Radio Science, 2004 The growing demand for fast access to accurate ionospheric electron density profiles and ionospheric characteristics calls for efficient dissemination of data from the many ionosondes operating around the globe.
B.W. Reinisch +4 more
doaj +2 more sources
Study of sporadic E layers based on GPS radio occultation measurements and digisonde data over the Brazilian region [PDF]
Annales Geophysicae, 2018 This work presents new results about sporadic E-layers (Es layers) using GPS (global positioning system) radio occultation (RO) measurements obtained from the FORMOSAT-3/COSMIC satellites and digisonde data.
L. C. A. Resende +6 more
doaj +2 more sources
Southern high-latitude Digisonde observations of ionosphere E-region Bragg scatter during intense lacuna conditions [PDF]
Annales Geophysicae, 2004 During summer months at solar cycle minimum, F-region lacuna and slant-Es conditions (SEC) are common features of daytime ionograms recorded around local magnetic noon at Casey, Antarctica. Digisonde measurements of drift velocity height profiles show
D. P. Monselesan +5 more
doaj +6 more sources
Comparisons of IRI TEC predictions with GPS and digisonde measurements at Ebro [PDF]
Advances in Space Research, 2007 Abstract Vertical TEC measurements obtained with GPS satellite signals (GPSTEC) and total electron content derived from ionograms (ITEC) are compared with the latest version of the International Reference Ionosphere, IRI-2000 (IRITEC). Digisonde data from the Ebro station (40.8°N, 0.5°E) recorded during two years of high solar activity 2000 (Rz 12 =
Mosert, Marta Estela +4 more
openaire +3 more sources
Journal of Geophysical Research: Space PhysicsAbstract Geomagnetic storms, through the complex modulation of space weather, can disrupt observational instruments. During certain storms, digisonde observations exhibit complete echo disappearances, a phenomenon that has not been systematically investigated. We conducted a statistical analysis of this phenomenon using digisonde data
Kun Wu +10 more
openaire +2 more sources
Simultaneous Observations of a Sporadic E Layer by Digisonde and SuperDARN HF Radars at Zhongshan, Antarctica [PDF]
, 2022 Sporadic E (Es) layers could be composed of metallic ions and formed, modified, or transported by the action of convective electric fields in the high latitude ionosphere.
Yang, H. +7 more
core +3 more sources