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PSLV C43: India’s Best Earth-Imaging Satellite HysIS, Launched Successfully

India's first hyper-spectral imaging satellite along with 30 foreign satellites.

Launching PSLV-C43, ISRO

ISRO successfully launched its PSLV-C43 rocket carrying India’s best-ever high-resolution earth imaging satellite HysIS (Hyperspectral Imaging Satellite). It also bears 30 small co-passenger satellites from eight different countries, mostly belonging to the United States. The 30 commercial satellites, including one micro and 29 nano satellites, are from eight countries. Of the total 30 satellites whose combined weight is 261.5 kg, 23 are from the US.

During the 112-minute-long mission, PSLV C43 first delivered India’s primary satellite into the polar sun-synchronous orbit at an altitude of 630 km 17 minutes and 27 seconds after the launch and is now in the process of delivering 30 international co-passengers after descending to 504 km altitude in two batches.

10 things to know about HysIS:

  • HysIS is an advanced Earth observation satellite that weighs 380kg.
  • This is the first time a full-fledged hyperspectral imaging satellite has been launched. Hyperspectral or hyspex imaging combines the power of digital imaging and spectroscopy.
  • It will be used to study the Earth’s surface in visible, near infrared and shortwave infrared regions of the electromagnetic spectrum.
  • The satellite can see in 55 spectral or colour bands. It will be placed in a 636 km polar sun-synchronous orbit with an inclination of 97.957°.
  • It collects and processes information from across the electromagnetic spectrum and enables distinct identification of objects, material or processes on the Earth by reading the spectrum for each pixel of a scene from space.
  • HysIS carries two payloads — One to capture images in the visible near-infrared (VNIR) range of the light spectrum and another in the shortwave infrared (SWIR) range.
  • The satellite will be used for a range of applications like agriculture, forestry and assessment of coastal zones, inland water studies, soil surveys, environmental studies, detection of pollution from industries and other geological environments.
  • Besides being an Earth observation satellite, HySIS will also be used by the military for surveillance purpose.
  • The satellite will provide Earth observation service till 2023.
  • The optical imaging detector array chip in the satellite has been designed by Isro’s Ahmedabad-based Space Applications Centre and manufactured by its electronic arm, Semi-Conductor Laboratory, Chandigarh.

The PSLV-C43 infograph

This infograph will help you to understand the all anatomy of the PSLV C43 mission at a glance.

PSLV C43 infograph
Credit: TOI

Role of HysIS

According to ISRO, HysIS is an earth observation satellite developed by ISRO. It is the primary satellite of the PSLV-C43 mission. The satellite will be placed in 636 km polar sun synchronous orbit (SSO) with an inclination of 97.957º. The mission life of the satellite is 5 years.

The primary goal of HysIS is to study the earth’s surface in visible, near infrared and shortwave infrared regions of the electromagnetic spectrum.

HysIS is a very rare satellite with a super-sharp eye, and very few countries have indigenously mastered this technology. Many countries are trying to send such hyper-spectral cameras into space but interpreting its results is not easy.

Dr K Sivan ISRO Chairman
Source / Journal ISRO

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