Auto-GIPSY網際自動GPS資料計算服務測試

On The Performance of Auto-GIPSY, An Internet Based Automated GPS Computation Service

研究以國立交通大學所設置的NCTU固定站以及國立成功大學所設置的DONS固定站2001年三月的觀測資料作為測試。探討應用網際GPS自動化算服務系統Auto-GIPSY處理觀測時段24小時、6小時、4小時以及2小時解算的成果。對照組數據為利用國際IGS衛星追蹤站武漢（WUHN）以及馬尼拉天文台（PIMO）解算NCTU以及DONS固定站2001/3/1至2001/3/7七天的觀測資料，以這七天逐天解算成果的平均值當為參考值。選用的精度指標包括：平均誤差、絕對值平均誤差以及誤差範圍三種。本研究中在觀測時段24小時的情況下，解算成果的最大平面誤差皆在兩公分以內，在高程方面最大誤差在正負十公分之間。 The performance of Auto-GIPSY, an Internet based automated GPS computation service is evaluated in this study. The observations obtained from two fixed stations NCTU and DONS starting from 2001/3/1 to 2001/3/31 are used for the experiments. These two stations are established by National Chiao Tung University and National computation, the IGS station WUHN and PIMO are taken as the reference station. Computation is performed for each day and the mean of the seven days is taken as the true value for comparison. For the Auto-GIPSY service, the observations are split into intervals of 24, 6, 4 and 2 hours. For the 24 hours interval, the maximum horizontal position error is less than two centimeters, the maximum height error is about ten centimeters.

The performance of Auto-GIPSY, an Internet based automated GPS computation service is evaluated in this study. The observations obtained from two fixed stations NCTU and DONS starting from 2001/3/1 to 2001/3/31 are used for the experiments. These two stations are established by National Chiao Tung University and National computation, the IGS station WUHN and PIMO are taken as the reference station. Computation is performed for each day and the mean of the seven days is taken as the true value for comparison. For the Auto-GIPSY service, the observations are split into intervals of 24, 6, 4 and 2 hours. For the 24 hours interval, the maximum horizontal position error is less than two centimeters, the maximum height error is about ten centimeters.