  A constellation of remote sensing small satellite system has been developed
for infrastructure monitoring in India by using SAR Payload. The LEO
constellation of the small satellites is designed in a way, which can cover the
entire footprint of India. Since India lies a little above the equatorial
region, the orbital parameters are adjusted in a way that inclination of 36
degrees and RAAN varies from 70-130 degrees at a height of 600 km has been
considered. A total number of 4 orbital planes are designed in which each
orbital plane consisting 3 small satellites with 120-degrees true anomaly
separation. Each satellite is capable of taking multiple look images with the
minimum resolution of 1 meter per pixel and swath width of 10 km approx. The
multiple look images captured by the SAR payload help in continuous
infrastructure monitoring of our interested footprint area in India. Each small
satellite is equipped with a communication payload that uses X-band and VHF
antenna, whereas the TT&C will use a high data-rate S-band transmitter. The
paper presents only a coverage metrics analysis method of our designed
constellation for our India footprint by considering the important metrics like
revisit time, response time, and coverage efficiency. The result shows that the
average revisits time for our constellation ranges from about 15- 35 min which
is less than an hour and the average response time for this iteratively
designed constellation ranges from about 25-120 min along with hundred percent
coverage efficiency most of the time. Finally, it was concluded that each
satellite has 70kg of total mass and costs around $ 0.75M to develop.

Robotics;Instrumentation and Methods for Astrophysics;Systems and Control;Systems and Control