Determination of Total Electron Content at Equatorial Region—Thailand Using Radio Occultation Technique
نویسندگان
چکیده
منابع مشابه
A new algorithm for retrieving GPS radio occultation total electron content
[1] A new algorithm for retrieving the relative ionospheric satellite-to-satellite total electron content during Global Positioning System (GPS) radio occultations is proposed. The algorithm consists of a linear combination of the L1 and L2 excess phase data using precise orbit information of the transmitter and receiver. The combination eliminates the effects of refractive bending and dispersi...
متن کاملModel Validation for GPS Total Electron Content (TEC) using 10th Polynomial Function Technique at an Equatorial Region
GPS receivers have been profitably employed by researchers for investigations into ionospheric and atmospheric science. However, a number of improvements in measurement accuracy are necessary for today’s applications. The ionosphere has practical importance in GPS applications because it influences transionospheric radio wave propagation. Total Electron Content (TEC) is one of the parameters of...
متن کاملAtmosphere sounding using GPS radio occultation
Introduction On July 17, 1995 the U.S. Air Force announced “ .. that today the Global Positioning System (GPS) satellite constellation has met all requirements for Full Operational Capability”. Apart from precise positioning GPS signals also can be used to derive characteristic properties of the propagation medium (neutral atmosphere and ionosphere). Onboard the Low-Earth-Orbiting MICROLAB-1 sa...
متن کاملShort-term relationship of total electron content with geomagnetic activity in equatorial regions
[1] The short-term relationship between equatorial ionosphere and geomagnetic activity is examined. Hourly averages of the total electron content (TEC) and critical frequency of the F2 layer (foF2) are compared with the Dst index, a proxy for equatorial geomagnetic activity, at three local times (0700–0800, 1200–1300, and 1600–1700 LT) from March 1998 to August 1999. Owing to the geomagnetic la...
متن کاملObservations in equatorial anomaly region of total electron content enhancements and depletions
A GSV 4004A GPS receiver has been operational near the crest of the equatorial anomaly at Udaipur, India for some time now. The receiver provides the line-of-sight total electron content (TEC), the phase and amplitude scintillation index, σφ and S4, respectively. This paper presents the first results on the nighttime TEC depletions associated with the equatorial spread F in the Indian zone. The...
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ژورنال
عنوان ژورنال: Atmospheric and Climate Sciences
سال: 2016
ISSN: 2160-0414,2160-0422
DOI: 10.4236/acs.2016.62027