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IRNSS: Reflector Information

IRNSS Retroreflector Array
Courtesy of ISRO/ISTRAC

RetroReflector Array (RRA) Characteristics:

The IRNSS satellite has retroreflector array consisting of 40 corner cubes; each cube is 29.7 mm in height and 38 mm in diameter. These cubes were manufactured in India; design, assembly and testing was performed by LEOS/ISRO, Bangalore, India. The dihedral angle of the cube is 0 degrees with a tolerance of 0.5 arc seconds. The cubes are made of Suprasil-311. Detailed drawings of the retroreflector array and cubes are available.

Related information:

  • Porcelli, L., et al., "Thermo-optical vacuum testing of IRNSS laser retroreflector array qualification model", Advances in Space Research, Vol. 60, No. 5, Pp. 1054-1061, September, 2017, doi: