A method to align POS data and linear push-broom imaging data

In the field of aerophotogrammetry and aerial remote sensing, the linear push-broom imager is increasingly applied for getting the imaging information. What the linear push-broom imager captures is a sequence of line images, therefore, it is essential for imaging to collect the POS data of each line image synchronously. In other words, we need a good method to align the POS data and the line images which are captured at the same time. Using GPS time to align data is a traditional method, but sometimes, GPS does not work, so we present a new method to align the POS data and the line images using computer's high resolution performance counter. What's more, we have tested this method proposed in this paper by ground-based experiments and flight experiments, the test results show this method is robust.