问题 问答题 简答题

何谓基线解算中的整数解(固定解)?简要说明其计算方法及优点?

答案

参考答案:

当整周模糊度参数取整数时所求得的基线向量解称为整数解,也称为固定解。计算步骤如下:

1)求初始解。用修复周跳、剔除粗差后的载波相位观测值进行基线向量的解算,求得基线向量及整周模糊度参数,这种解称为初始解。由于各种误差的影响,初始解中的模糊度参数一般为实数。

2)将整周模糊度固定为整数。采用取整法、置信区间法或其他方法,非常有把握将上述模糊度参数一一固定为整数。

3)求固定解。将上述固定为整数的模糊度参数作为已知值代回法方程式,重新求解基线向量,从而获得固定解。

整数解是在模糊度参数已被恢复为真值的基础上求得的,是与一组不受误差影响的、正确的、模糊度参数相对应的解,所以精度较高。

改错题
下列句子中各有一处错误,请找出。
( )1. They need much things.                                 
              A      B     C     D                                        
( )2. They are twin brothers, but they are in different look.
                    A                         B              C                D                   
( )3. That girl is a friend of my.                          
             A          B      C          D                                    
( )4. Could you please to tell me your name?                
                           A         B     C    D                                   
( )5. Who can help she? She is in poor English.             
             A           B     C                    D                               
( )6. My brother works in hospital. He is a good doctor.    
                               A             B           C      D                              
( )7. Her family are very big.                              
             A    B       C          D                                  
( )8. —What would you like drinking?                      
                 A                   B        C                               
           —Some orange.                                      
                  D                                               
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