کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1766466 | 1020150 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Use of varying shell heights derived from ionosonde data in calculating vertical total electron content (TEC) using GPS - New method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
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![عکس صفحه اول مقاله: Use of varying shell heights derived from ionosonde data in calculating vertical total electron content (TEC) using GPS - New method Use of varying shell heights derived from ionosonde data in calculating vertical total electron content (TEC) using GPS - New method](/preview/png/1766466.png)
چکیده انگلیسی
The dispersive nature of the ionosphere makes it possible to measure its total electron content (TEC). Thus Global Positioning System, which uses dual-frequency radio signals, is an ideal system to measure TEC. When data from an ionosonde situated in polar region was observed, the height of an approximated thin shell of electrons (shell height) used in GPS studies was seen not to be fixed but rather changing with time. Here we introduce a new method in which we included the varying shell heights derived from the ionosonde to map the slant total electron content from GPS to obtain a more precise vertical total electron content of the ionosphere contrary to some previous methods which used fixed shell heights. In this paper we also compared the ionosonde derived TEC with the GPS derived vertical TEC (vTEC) values. These GPS vTEC values were obtained from GPS slant TEC (sTEC) measurements using both fixed shell height and varying shell heights (from ionosonde measurements). For the polar regions, the varying shell height approach produced better results than the fixed shell height and compared to exponential function, Chapman function seems to be a better function to model the topside ionosphere.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 44, Issue 11, 1 December 2009, Pages 1309-1313
Journal: Advances in Space Research - Volume 44, Issue 11, 1 December 2009, Pages 1309-1313
نویسندگان
Sajan C. Mushini, P.T. Jayachandran, R.B. Langley, J.W. MacDougall,