Taiwan's National Space Organization (NSPO) plans to launch a series of scientific satellites during the next 15 years and will actively pursue international collaboration on scientific satellite missions. The next NSPO satellite mission is based on a LEO satellite concept, ARGO, which has a sun-synchronous orbit of 97.9 degree inclination and ̃ 620 km altitude, and is planned for launch in 2011. Besides carrying a remote sensing camera for earth observation, ARGO will have four space science instruments to carry out the science mission of studying ionospheric physics related to space weather with emphasis on magnetosphere-ionosphere- thermosphere coupling physics, space weather monitoring, and particle and electromagnetic wave phenomena. These four instruments are: a flux gate magnetometer (MFI), an Auroral Electron Spectrometer (AES) with energy coverage from ̃12 eV to ̃18 keV, an Imaging and Rapid-scanning ion Mass spectrometer (IRM) with energy coverage from ̃0.5 to ̃70 eV, and an Atmospheric Neutral Analyzer (ANA) which covers 0.1 - 2 km/s neutral velocity range. These instruments will have high time resolution and good pitch angle coverage. The science instrument operation will be open for coordinated observation campaigns with other satellite missions (FORMOSAT-2, Reimei, THEMIS, Cassiope, QuickSat, etc.) and ground-based observations.