Modelling for data acquisition, storage and transmission of EOS

Earth observation satellite (EOS) plays an important role in the aspects of geodetic mapping, remote sensing, military investigation, etc. Recent studies mainly build models for the EOS equipped with the frame camera but insufficiently take into account the data acquisition mode of currently popular pushbroom camera. In this paper, according to the characteristic of the pushbroom camera, we adopt a two-state Markov modulated deterministic process (MMDP) to approximate camera's actual on and off states. Then we model the data acquisition, storage and transmission processes of the EOS as an MMDP/D/1/K queueing process. Theoretical derivations unveil the intertwined relations among the data loss probability, the buffer size, the transmission rate and the ratio of the camera on-off duration. Furthermore, simulations verify the feasibility of our system model. Finally, the performance analysis is provided to instruct the network resource allocation with given quality of service (QoS) demands.