Study on the Positioning Accuracy Improvement of North Pacific LORAN-C Chain

北太平洋LORAN-C链定位精度提升研究

• 批准号: 08651093
• 负责人: KAKIHARA Toshiharu
• 金额: $ 1.41万
• 依托单位: Tokyo University of Fisheries
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08651093/
• 关键词: LORAN-C; Radio Navigation System; Time Difference; Positioning Accuracy; Differential LORAN-C; Hyperbolic Navigation; Secondary Factor (SF); Additional SF

(1996)LOP (Line of Position) distortion of LORAN-C (Long Rang Navigation System-C) Northwest Pacific Chain (8930 chain) was investigated at Sagami Bay in 1996.As the results of observation, the high repetition accuracy of 0.1 mu s of LOP was observed athe fixed point, and it was cleared that the large local distortion, which is caused by long land propagation and it attains to some hundred meters, are existing in Y and Z station's LOP at Sagami Bay.(1997)To improve the positioning accuracy of LORN-C,the differential correction method is proposed and tried at Tateyama Bay in 1997. The positioning error decreased to 1/10 - 1/20 values by using the correction. From this results, the efficiency of differential method was verificated.

(1996) 1996年在相模湾对LORAN-C（远程导航系统-C）西北太平洋链（8930链）的LOP（位置线）畸变进行了调查。观测结果是，在固定点观察到了0.1μs的LOP高重复精度，并明确了Y中存在由长距离陆地传播引起的长达数百米的局部畸变。 (1997)为了提高LORN-C的定位精度，提出了差分改正方法，并于1997年在立山湾进行了尝试。通过改正，定位误差降低到1/10～1/20值。由此结果验证了微分法的有效性。

项目成果

T.KAKIHARA: "LOP Distortion of LORAN-C Observed at Sagami Bay" Fisheries Engineering. Vol.34 (3). 1-8 (1998)

T.KAKIHARA：“在相模湾观察到的 LORAN-C 的 LOP 畸变”渔业工程。

柿原利治・宮本佳則・武田誠一・上野公彦・佐藤要: "相模湾で観測されたロランCのLOP歪み" 水産工学. 34(3). 1-8 (1998)

Toshiharu Kakihara、Yoshinori Miyamoto、Seiichi Takeda、Kimihiko Ueno 和 Kaname Sato：“在相模湾观察到的 Loran C 畸变”，渔业工程 34(3)。

柿原 利治・宮本 佳則・武田 誠一・上野 公彦・佐藤 要: "相模湾で観測されたロランCのLOP歪み" 水産工学. 34(3). 1-8 (1998)

Toshiharu Kakihara、Yoshinori Miyamoto、Seiichi Takeda、Kimihiko Ueno、Kaname Sato：“在相模湾观察到的 Loran C 畸变”，渔业工程 34(3)。