Kompsat-3

KOMPSAT-3 Satellite Sensor (0.7m)

KOMPSAT-3 (Arirang-3) spacecraft was successfully launched on May 17, 2012 (16:39 UTC) from the Tanegashima Space Center of JAXA, Japan on the H-IIA launch system. Launch provider: Mitsubishi Heavy Industries, Ltd.

KOMPSAT-3 is an optical high-resolution Korean observation mission of KARI (Korea Aerospace Research Institute). The project was started in 2004. The objective is to provide observation continuity from the KOMPSAT-1 and KOMPSAT-2 missions to meet the nation's needs for high-resolution optical imagery required for GIS (Geographical Information Systems) and other environmental, agricultural and oceanographic monitoring applications.

The KOMPSAT-3 is 3-axis stabilized. The agile spacecraft features a body pointing capability of ±45o into any direction (cross-track or along-track). This satellite agility permits event monitoring as well as single-pass stereoscopic observations

KOMPSAT-3 can provide sub-meter images with various imaging modes. It will continue to provide sub-meter imagery to domestic and international users for the applications of public safety, resource management, environmental monitoring, location-based services, intelligence and disaster monitoring.

Spectral bands	450-900 nm Pan (Panchromatic) 450-520 nm MS1 (Multispectral), blue 520-600 nm MS2, green 630-690 nm MS3, red 760-900 nm MS4, NIR (Near Infrared)
Optics	- Korsch-type telescope design on a CFRP optical bench - 80 cm diameter of primary mirror aperture (the mirror is lightweighted) - All mirrors (5) are of Zerodur design - Focal length = 8.6 m - F number = f/12
GSD (Ground Sample Distance)	- 0.7 m for Pan band at nadir - 2.8 m for MS bands at nadir
Swath width	15 km (at nadir)
Tilt angle	Roll: ±45o, pitch: ±30o
Location accuracy	< 48.5 m CE90
Pan CCD detector module	- Line array of 24,000 pixels consisting of 2 stacks of 12 k pixels each - TDI (Time Delay Integration), up to 64 TDI in 4 stages - Pixel pitch = 8.75 µm - Source data rate = 16 x 15 Mpixel/s (or 3.84 Gbit/s)
MS CCD detector module	- Line array of 6,000 pixels, provision of 8 stacks, TDI capability - Pixel pitch = 2 x 17.5 µm - Binning of MS pixels (MS pixels are 4 times longer than Pan pixels) - Source data rate = 4 x 240 Mbit/s
Antiblooming	Yes
PRNU (Photo Response Non-Uniformity)	Yes
DSNU (Dark Signal Non-Uniformity)	Yes
SNR (Signal-to-Noise Ratio)	> 100 for Pan and MS
Data quantization	14 bit
Data compression	CCSDS 120.1-G-1E
Payload data memory	512 Gbit
Data rate	1 GB/s

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