Official name XSAT
Alternative name X-Sat
Cospar ID 2011-015C
Norad ID 37389
Launch date 2011-04-20
Launch site SRI
Launch vehicle PSLV-G (3)
Country/Organization Singapore
Type application Earth Observation, Technology
Operator CREST (Centre for Research in Satellite Technologies)
RCS size MEDIUM
Decay date ON ORBIT
Period (min) 101.05
Inclination (deg) 98.31
Perigee (km) 798
Apogee (km) 819
Eccentricity 0.012987012987013
Mean motion (revs. per day) 14.2503711034142
Semi-Major axis (km) 7186.635
Raan (deg) 137.4381
Arg of perigee (deg) 44.1016
Shape Box + 2 Pan
Mass (kg) 105
Height (m) 0.9
Width (m) 0.6
Depth (m) 0.6
Lifetime 3 years
Contractors Satrec Initiative
Equipment 3 band multi-spectral imager, DLR GPS, PPU
Propulsion None
Configuration SI-100 bus
Power 2 deployable fixed solar arrays, batteries

X-Sat is a microsatellite technology demonstration mission of CREST (Centre for Research in Satellite Technologies). CREST, a joint venture of NTU (Nanyang Technological University) and DSO National Laboratories Singapore, was established for this project.

The objective of the X-SAT mission is to demonstrate technology in support of high-resolution imaging capabilities and to analyze and implement onboard parallel processing algorithms, thereby demonstrating improved mission achievements for generally downlink-limited small satellite imaging missions.

The purpose of X-Sat is:

  • Earth observation and imaging for environmental applications such as monitoring of forest fires and ocean red tides, with a 10 m resolution multispectral (three spectral bands in the visible and near infrared spectrum) instrument as a primary payload.
  • satellite-based data acquisition/distribution and messaging using mobile terminals.

Also two secondary payloads are on board:

  • Parallel Processing Unit: for experimentation of COTS electronics and FPGAs to perform reliable imaging algorithmic functions (image selection, classification, compression) in space.
  • DLR GPS: A GPS receiver provided by DLR for on-board experimentation using XSAT micro-satellite mission.

A launch agreement between Antrix Corporation (ISRO) and NTU for a launch as a piggy back payload on a was signed on Jan. 24, 2003.

Satellite COSPAR Date LS Launch Vehicle Remarks
XSAT 2011-015C 2011-04-20 SRI PSLV-G (3) with Resourcesat 2, YouthSat