NISAR Mission on track for a launch soon: NASA official

Subject: S&T

Section: Space tech

Context:

The NASA-ISRO Synthetic Aperture Radar (NISAR) Mission, designed to observe natural processes and changes in Earth’s complex ecosystems, is on track for an “early 2024” launch.

About the Mission:

The Joint Collaboration: NISAR is a Low Earth Orbit observatory developed jointly by NASA and ISRO, highlighting international collaboration in space exploration.
Launch Vehicle: The mission is set to launch from the Satish Dhawan Space Centre in Sriharikota onboard ISRO’s GSLV Mark-II launch vehicle.
Data Utility: NISAR data will offer unprecedented detail and assist researchers in various ways, including monitoring volcanic activity, tracking groundwater use effects, measuring ice sheet melt rates, and observing changes in global vegetation distribution.
- The open science and open data policy makes the mission unique in its scope.
Mission Life: The $1.5-billion NISAR mission has a planned mission life of three years and will survey Earth’s land and ice-covered surfaces every 12 days following a 90-day commissioning period.

Advanced SAR Technology

Dual-Band SAR:NISAR carries L and S dual-band Synthetic Aperture Radar (SAR) using the Sweep SAR technique, providing both wide coverage and high-resolution data.
Observatory Structure: The SAR payloads are mounted on the Integrated Radar Instrument Structure (IRIS) along with the spacecraft bus, forming an observatory.
Contributions: NASA’s Jet Propulsion Laboratory (JPL) provides the L-band SAR and several key components, while ISRO’s U R Rao Satellite Centre contributes the spacecraft bus, S-band SAR electronics, launch vehicle, and mission operations.

Important Milestones achieved

Thermal Vacuum Testing: The thermal vacuum testing, a critical system-level test, was successfully completed in Bengaluru. This test ensures that the spacecraft can operate effectively under extreme temperature conditions.
EMI and EMC Testing: Electromagnetic interference (EMI) and electromagnetic compatibility (EMC) testing have also been successfully accomplished.
Upcoming Vibration Tests: The next phase involves conducting vibration tests to simulate the harsh launch environment. This test will subject the satellite to intense vibrations while mimicking the conditions of a rocket launch.

Source: TH