NISAR is a joint Earth-observing mission between ISRO and which other space agency? By Mukesh Sharma - April 21, 2021 21st April 2021, Amazon Daily Quiz – NISAR is a joint Earth-observing mission between ISRO and which other space agency? ESA NASA AEB CNSA The correct answer is NASA. NISAR is a joint Earth-observing mission between ISRO and NASA space agency.