کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1766563 | 1020155 | 2009 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Epochwise prediction of GPS single differenced ionospheric delays of formation flying spacecraft
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Continuously changing ionospheric conditions hamper the assessment of the quality of the predictions. Comparison of both methods shows that the raytracing method performs better. The difference of predictions and measurements generally shows a smaller RMS than the measurements alone. However, both methods suffer from a number of systematically unpredicted observations, which arise from small unaccounted differential variations in electron densities along the path of the GPS signals. These prediction methods perform better when spacecraft separation is small. Baselines considered here range from tens of kilometres down to several hundred metres. When smallest spacecraft separation occurs (0.4Â km), the single differenced ionospheric delays exhibit RMS values of 0.0089Â m. The first method shows a difference between measurements and predictions with an RMS of 0.0081Â m. For the second method the difference RMS is found to be 0.0067Â m.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 44, Issue 9, 2 November 2009, Pages 987-1001
Journal: Advances in Space Research - Volume 44, Issue 9, 2 November 2009, Pages 987-1001
نویسندگان
P.W.L. van Barneveld, O. Montenbruck, P.N.A.M. Visser,