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目前,立体量测仪作业公式很多,但都没有把与象点坐标无关的△P一次项和高次项包括进去,仅考虑了—((2b_0△P)/f)·(?)_1(即—(2b_左△P/f)α_x左)项。对于展开至倾角一次项的10项公式而言,略去了—((△P~2)/f)(?)_1项;对于展开至倾角二次项的69项公式而言,略去了—((△P~2)/f)(?)_1,—等(△P/2)ω_1~2,—△P(?)_1~2,—(△P~3/f~2)(?)_1~2,—(3b_0△P~2/f~2)(?)_1~2,—(3b_0~2△P/f~2)(?)_1~2…等项。根据计算,当(?)_1>1°,ω_1>3°,△P=15毫米,f=210毫米,H=3500米时,影响高程可达2～6米。
At present, there are many operational formulas for stereo measuring instruments, but neither the first-order term nor the high-order term of △ P that has nothing to do with the coordinates of the image points are included. Only the value of - ((2b_0ΔP) / f) · (?) _1 Ie - (2b_final ΔP / f) α_x left). For the 10 equations that expand to the first term of dip, - ((ΔP ~ 2) / f) (?) _ 1 is omitted; for the 69 formulas expanded to dip quadratic terms, - (△ P ~ 2) / f) (?) _1, - (△ P / 2) ω_1 ~ 2, - △ P ~? ~ 1 ~ 2, - △ P ~ 3 / f ~ 2 ?) _1 ~ 2, - (3b_0 △ P ~ 2 / f ~ 2) (?) _1 ~ 2, - (3b_0 ~ 2 △ P / f ~ 2) (?) _1 ~ 2 ... and so on. According to the calculation, the influence elevation can reach 2 to 6 meters when (?) _ 1> 1 °, ω_1> 3 °, ΔP = 15 mm, f = 210 mm and H = 3500 m.