Single epoch undifferenced positioning function Model of GPS
Wengang Zhang · Gnss World of China · 2003
Based on GPS theory, undifferenced ambiguity and double difference ambiguity are created, and analyses are made on the characters and contents of them. Because the original design matrix is rank defect and undifferenced ambiguity is not an integer, the undifferenced positioning function model can not be used directly, so reparameterization is put forward, and undifferenced ambiguity is transferred into double difference ambiguity, and undifferenced positioning function model based on reparameterization is created.