ORBCOMM that consists of 35 satellites for low earth orbit at an altitude of 835Km is the satellite mobile data service to use it conveniently & efficiently at the various field I.E transportation, environment, meteorology and logistics at the whole world not to be restricted by time & place.
ORBCOMM is especially Strong under inclement weather with characteristics of VHF long wave. And because of low earth orbit, it is not any delay & Distortion.
Also it is possible to watch and control unmanned sensor operation with data tow-side transmission.
For satellite translation efficiency, size of data is to be divided with short sentence(6Byte) and long sentence(250byte).