s: Airborne laser image and mapping system （ALIMS） which integrates kinematic GPS positioning system

laser range finder

attitude measurement unit and optical mechanical scanner into a rigid platform can generate DEM （digital elevation model） and geo referenced image rapidly and efficiently. We regard ALIMS as a 3D remote sensing system

because it can directly obtain 3D position together with spectral information. Kinematic GPS is a key sensor that is able to give the precise 3D position of the platform. In this paper we present the kinematic GPS technology and data processing techniques. First

we analyses the GPS technical requirement which can suit for ALIMS. For example

why do we need high differential GPS positioning technique

how to synchronize GPS data with remote sensing data

and why collecting high rate GPS data is important. Then

we discuss the GPS data processing procedure

including differential GPS processing

solution of pulse’s position

datum transformation

coordinate project and eccentric correction. In several airborne experiments we have applied kinematic GPS positioning technology and corresponded data processing

and the result is satisfactory.