2(10分) (1)、n=8,t=4,r=4
??L??L??L??1800?0L1238??L??L??L??1800?0L2345??L??L??L??1800?0L4567???? sinL2sinL4sinL6sinL8?1?0?sinL?sinL?sinL?sinL1357线性化:?ctgL1V1?ctgL2V2?ctgL3V3?ctgL4V4?ctgL5V5?ctgL6V6?ctgL7V7?ctgL8V8?W?0W????(1?sinL1sinL3sinL5sinL7)sinL2sinL4sinL6sinL8
(2)
??SCD??XD??XC???Y?2D??YC?2 权函数式为:???????Y???YCD?CD?CD?CD??sxC?yC?xD?yD?CD??????SSSSCDCDCDCD3(10分)(1),先得求横向中误差??,横向中误差??的方向??与?PA方向垂直:
????PA?900???????E?150000? ???Ecos???Fsin???2.11(dm)
222222???1.45dm?????SPA????5.??99(2)求纵向误差?s:
???PA??E?60000??s2?E2cos2??F2sin2??1.397(dm2)
?s?1.182dm?s1边长相对中误差为:K?SPA?4230?,X?,u=2,c=r+u=3。 4 (10分)、n=3,t=2,r=1,选取P1,P2点高程平差值为参数X120 X10?HA?h1?11.352m,X2?Hb?h3?10.826m
(1) 列误差方程
??X??Hh?1v1?x11A?v1??10??0??x?v????11??1????5? ???X??X? v??x?? ?x?5h212212?2????x???2????????X?2??Hv3??x?v3????0?1???0??h32A 共 3 页第 2 页
?1?C?1? ,C?2km,则P (2)组成法方程并解算 Pi?1?1,P2?1,P3?2,P???Si?2????2?1??5?TNBB?BTPB??,W?BPl????5???13????2??1??NBB x W???(mm)??1??11.354?0????X?X?x?m10.825??
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