Mathematical Model of Airborne InSAR Block Adjustment

High-precision surface elevation information can be obtained efficiently by airborne InSAR systems. Airborne InSAR systems have been an important means for remote sensing data acquisition and mapping in the areas where surveying and mapping is currently difficult.A three dimensional positioning and error model for airborne InSAR block adjustment were researched.Observations，weights determination and adjustment parameters were analyzed.In an experiment，76 airborne In-SAR images at 0.5 m resolution were used generate a block of 4 strips by 19 rows.The results show that the positional accuracy of a DEM and DOM at scale of 1:10 000 were achieved for large areas with sparse control points.