Claire and Iris Comparison


Difference between Claire and Iris

When you build and operate the world’s first satellite that can detect greenhouse gas emissions from industrial facilities, you learn a few lessons in the process. Building on the lessons learned from our demonstration satellite Claire (GHGSat-D), Iris (GHGSat-C1) will have a nearly 10-fold increase in performance.

Claire & Iris

Claire and Iris might look similar on the outside but there are some very important distinctions between the two satellites that will enable Iris to detect smaller leaks when compared to Claire.

Difference Between Claire and Iris

Upgrades to Iris:

  • Improved stray light/ghosting mitigation
  • Addition of onboard calibration features
  • Improved radiation mitigation to protect the payload from solar and cosmic radiation
  • Optimized spectroscopy for primary instrument
  • Replacement of secondary instrument
  • Addition of experimental optical downlink “Darkstar”
  • Addition of a 4th reaction wheel for redundancy

While Claire has and continues to have an incredible track record, there is always room for improvement. Iris is the embodiment of these improvements. With this upgraded technology, Iris will significantly improve her operational performance and obtain actionable insights for GHGSat and our customers.