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November 17, 2016. November 17, 2016. July 7, 2016. Ti-T0) * C = P(Xi, Yi, Zi) – P(X, Y, Z). 其中Ti=T Di，P(Xi, Yi, Zi)为卫星i的空间坐标，P(X, Y, Z)为GPS接收机的空间坐标，两者向量相减为距离，则公式又可写为. T Di-T0) * C = P(Xi, Yi, Zi) – P(X, Y, Z). T D1-T0) * C = P(X1, Y1, Z1) – P(X, Y, Z). T D2-T0) * C = P(X2, Y2, Z2) – P(X, Y, Z). T D3-T0) * C = P(X3, Y3, Z3) – P(X, Y, Z). T D4-T0) * C = P(X4, Y4, Z4) – P(X, Y, Z). 可知，只要知道每颗卫星的坐标位置，以及测得每颗卫星信号的相对传播延时时差，即可求解此4元方程，得到接收机坐标P(X, Y, Z)。 July 5, 2016. July 5, 2016. July 1, 2016.

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射天狼科技 – 专业软件无线电公司 | 4sirius.com Reviews

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November 17, 2016. November 17, 2016. July 7, 2016. Ti-T0) * C = P(Xi, Yi, Zi) – P(X, Y, Z). 其中Ti=T Di，P(Xi, Yi, Zi)为卫星i的空间坐标，P(X, Y, Z)为GPS接收机的空间坐标，两者向量相减为距离，则公式又可写为. T Di-T0) * C = P(Xi, Yi, Zi) – P(X, Y, Z). T D1-T0) * C = P(X1, Y1, Z1) – P(X, Y, Z). T D2-T0) * C = P(X2, Y2, Z2) – P(X, Y, Z). T D3-T0) * C = P(X3, Y3, Z3) – P(X, Y, Z). T D4-T0) * C = P(X4, Y4, Z4) – P(X, Y, Z). 可知，只要知道每颗卫星的坐标位置，以及测得每颗卫星信号的相对传播延时时差，即可求解此4元方程，得到接收机坐标P(X, Y, Z)。 July 5, 2016. July 5, 2016. July 1, 2016.

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射天狼科技 – 专业软件无线电公司 | 4sirius.com Reviews

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November 17, 2016. November 17, 2016. July 7, 2016. Ti-T0) * C = P(Xi, Yi, Zi) – P(X, Y, Z). 其中Ti=T Di，P(Xi, Yi, Zi)为卫星i的空间坐标，P(X, Y, Z)为GPS接收机的空间坐标，两者向量相减为距离，则公式又可写为. T Di-T0) * C = P(Xi, Yi, Zi) – P(X, Y, Z). T D1-T0) * C = P(X1, Y1, Z1) – P(X, Y, Z). T D2-T0) * C = P(X2, Y2, Z2) – P(X, Y, Z). T D3-T0) * C = P(X3, Y3, Z3) – P(X, Y, Z). T D4-T0) * C = P(X4, Y4, Z4) – P(X, Y, Z). 可知，只要知道每颗卫星的坐标位置，以及测得每颗卫星信号的相对传播延时时差，即可求解此4元方程，得到接收机坐标P(X, Y, Z)。 July 5, 2016. July 5, 2016. July 1, 2016.

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July 7, 2016. Ti-T0) * C = P(Xi, Yi, Zi) – P(X, Y, Z). 其中Ti=T Di，P(Xi, Yi, Zi)为卫星i的空间坐标，P(X, Y, Z)为GPS接收机的空间坐标，两者向量相减为距离，则公式又可写为. T Di-T0) * C = P(Xi, Yi, Zi) – P(X, Y, Z). T D1-T0) * C = P(X1, Y1, Z1) – P(X, Y, Z). T D2-T0) * C = P(X2, Y2, Z2) – P(X, Y, Z). T D3-T0) * C = P(X3, Y3, Z3) – P(X, Y, Z). T D4-T0) * C = P(X4, Y4, Z4) – P(X, Y, Z). 可知，只要知道每颗卫星的坐标位置，以及测得每颗卫星信号的相对传播延时时差，即可求解此4元方程，得到接收机坐标P(X, Y, Z)。模拟GPS信号的第二步，即为根据接收机位置P(X, Y, Z)，以及星历数据，计算出当前位置的可见卫星，通过方程组解算出各可见卫星信号的相对延时Di，并根据Di产生相应时序的信号。

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July 7, 2016. Ti-T0) * C = P(Xi, Yi, Zi) – P(X, Y, Z). 其中Ti=T Di，P(Xi, Yi, Zi)为卫星i的空间坐标，P(X, Y, Z)为GPS接收机的空间坐标，两者向量相减为距离，则公式又可写为. T Di-T0) * C = P(Xi, Yi, Zi) – P(X, Y, Z). T D1-T0) * C = P(X1, Y1, Z1) – P(X, Y, Z). T D2-T0) * C = P(X2, Y2, Z2) – P(X, Y, Z). T D3-T0) * C = P(X3, Y3, Z3) – P(X, Y, Z). T D4-T0) * C = P(X4, Y4, Z4) – P(X, Y, Z). 可知，只要知道每颗卫星的坐标位置，以及测得每颗卫星信号的相对传播延时时差，即可求解此4元方程，得到接收机坐标P(X, Y, Z)。模拟GPS信号的第二步，即为根据接收机位置P(X, Y, Z)，以及星历数据，计算出当前位置的可见卫星，通过方程组解算出各可见卫星信号的相对延时Di，并根据Di产生相应时序的信号。

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射天狼科技 – 专业软件无线电公司

November 17, 2016. November 17, 2016. July 7, 2016. Ti-T0) * C = P(Xi, Yi, Zi) – P(X, Y, Z). 其中Ti=T Di，P(Xi, Yi, Zi)为卫星i的空间坐标，P(X, Y, Z)为GPS接收机的空间坐标，两者向量相减为距离，则公式又可写为. T Di-T0) * C = P(Xi, Yi, Zi) – P(X, Y, Z). T D1-T0) * C = P(X1, Y1, Z1) – P(X, Y, Z). T D2-T0) * C = P(X2, Y2, Z2) – P(X, Y, Z). T D3-T0) * C = P(X3, Y3, Z3) – P(X, Y, Z). T D4-T0) * C = P(X4, Y4, Z4) – P(X, Y, Z). 可知，只要知道每颗卫星的坐标位置，以及测得每颗卫星信号的相对传播延时时差，即可求解此4元方程，得到接收机坐标P(X, Y, Z)。 July 5, 2016. July 5, 2016. July 1, 2016.

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