ISRO`s Liftoff of PSLV-C47 Cartosat-3 Mission; An Achievement in Space Technology

ISRO`s Liftoff of PSLV-C47 Cartosat-3 Mission; An Achievement in Space Technology

ISRO launched its new Mission on 27th Nov 2019, Known as PSLV-C47 Cartosat-3 Mission 2019. CARTOSAT-3 satellite, ninth in the series, from the second launch pad at the spaceport of Sriharikota, about 120 km from here on November 27 at 09.28 am. PSLV-C47 on its 49th mission will carry CARTOSAT-3 along with 13 commercial nanosatellites from the United States. CARTOSAT-3 is a third-generation agile advanced satellite having high-resolution imaging capability. Download Gist, CLICK HERE

ISRO PSLV C-47 Cartosat

With an overall mass of 1,625 kgs, CARTOSAT-3 would address the increased user’s demands for large scale urban planning, rural resource and infrastructure development, coastal land use and land cover. PSLV-C47 is the 21st flight of PSLV in the ‘XL’ configuration (with six solid strap-on motors), ISRO said. The 13 commercial nanosatellites from the United States are being carried as part of the commercial arrangement with NewSpace India Ltd (NSIL), Department of Space. Among the 13 nano-satellites are FLOCK-4P, 12 in numbers, with mission objective of earth observation, and one satellite named MESHBED, whose mission objective is a communication testbed.


About 17 minutes and 38 seconds after lift-off, Cartosat-3 was injected into an orbit of 509 km at an inclination of 97.5 degrees to the equator. Cartosat-3 satellite is a third-generation agile advanced satellite having high-resolution imaging capability.  13 Commercial Nanosatellites from the USA were also successfully injected into designated orbit. These satellites were launched under commercial arrangement with NewSpace India Limited (NSIL), the commercial arm of the Indian Space Research Organisation (ISRO). Cartosat-3 is an advanced Indian Earth Observation satellite built and developed by ISRO, which will replace the IRS series.

It has a panchromatic resolution of 0.25 meters making it the imaging satellite with the highest resolution and Mx of 1 meter with a high-quality resolution which is a major improvement from the previous payloads in the Cartosat series. Potential uses include weather mapping, cartography or army defense, and strategic applications. Cartosat-3 has a resolution of 25 cm (10″). It uses 1.2 m optics with 60% of weight removal compared to Cartosat-2. Other features include the use of adaptive optics, acoustic optical devices, in-orbit focusing using MEMs and large area-light weight mirrors and advanced sense with a high-quality resolution.

Other environmental satellites can assist environmental monitoring by detecting changes in the Earth’s vegetation, atmospheric trace gas content, sea state, ocean color, and ice fields. By monitoring vegetation changes over time, droughts can be monitored by comparing the current vegetation state to its long term average. For example, the 2002 oil spill off the northwest coast of Spain was watched carefully by the European ENVISAT, which, though not a weather satellite, flies an instrument (ASAR) that can see changes in the sea surface. Anthropogenic emissions can be monitored by evaluating data of tropospheric NO2 and SO2.  These types of satellites are almost always in Sun-synchronous and “frozen” orbits. The Sun-synchronous orbit is in general sufficiently close to polar to get the desired global coverage while the relatively constant geometry to the Sun mostly is an advantage for the instruments. The “frozen” orbit is selected as this is the closest to a circular orbit that is possible in the gravitational field of the Earth. 












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