Inflight Evaluation of Location Determination Accuracy of MOS-1/DCS

Abstract

MOS-DCS, MOS-1 Data Collection System, pro-vides some opportunities to moniter the phenomena of the earth surface, by using the communication technology combined with the satellite in low polar orbit. The mission objectives of the MOS-DCS are classified into two, such as (1) the location determination of DCP (Data Collection Platfrom), making use of the doppler frequency measurement at ground station, and (2) the data communication through the satellite. Its servicing area is restricted within the circle of about 5000 km radius centered at the ground station, so the location accuracy depends not only on the errors cocerning the measurement of some engineering parameters, such as doppler frequency, synchronized time, and so on, but also where the DCP located.
This paper discusses the location accuracy of the MOS-DCS, regarding the originated DCP location within its servicing area and some correction para-meters, also combining with some results of experi-ments and simulations.