∎ STSAT-1

Launched in September 27, 2003, STSAT-1 was the first Korean astronomical satellite, building on the experience gained through the KITSAT projects to optimize small satellite technology and attempt astronomical observation.

STSAT-1 used a stabilized bus system to carry out far-ultraviolet spectrography, space physics, and remote data collection missions to take space environment measurements and explore terrestrial life forms. Using the Far-ultraviolet IMaging Spectrograph (FIMS), jointly developed with NASA, STSAT-1 mapped the distribution of hot gas in the galaxy, revealing key evidence on the evolution of the galaxy.

The successful launch and operation of STSAT-1 holds great meaning as it demonstrated the ability to carry out scientific missions on a small satellite and yielded world-class observation data.

---

Objectives
- To carry out world-class scientific observation using a small satellite
- To develop and test leading core technologies
- To observe space and earth through far-ultraviolet imaging spectrography
- To conduct particle detection experiments to investigate the auroral mechanism Key Specifications

Orbit	690 km circular Sun-synchronous Orbit
Size	665x551x830 mm
Weight	106 kg
Power Rating	Max. 180 W
Attitude Control Method	3-axis stabilization, < 0.2 deg pointing accuracy
Communication (Transfer Speed)	VHF-band Uplink (148 MHz frequency band) : 9600bps UHF-band Downlink (401 MHz frequency band) : 9600bps S-band Uplink: 9600bps S-band Downlink: 38400bps
Main Computer	KASCOM(80960)
Payloads	Far-ultraviolet IMaging Spectrograph(FIMS) Space Physics Package(SPP) - Solid-State Telescope(SST) - Electro-Static Analyzer(ESA) - Langmuir Probe(LP) - Scientific Magnetometer(SM) Data Collection System(DCS) Narrow Angle Star Sensor(NAST)