An Imaging Fourier Transform Spectrometer (IFTS) for Climate Observations

• Main Author: Singh, Gurpreet
• Other Authors: McElroy, C. Thomas
• Format: Thesis
• Language: English
• Published: 2019
• Subjects: Atmospheric sciences; Michelson interferometer; atmosphere; optics; remote sounding; methane; carbon dioxide; arctic; PHEOS; PCW; ACE-FTS; GOSAT; ABB; Canadian Space Agency; Environment and Climate Change Canada; FTIR; payload; space; AIM-North; satellite; spacecraft; permafrost; Arctic; Canada; Climate change
• Online Access: http://hdl.handle.net/10315/35868

Climate change is an ongoing global phenomenon having a greater impact at higher latitudes. The instrument development reported herein is aimed at demonstrating the feasibility of using an Imaging Fourier Transform Spectrometer (IFTS) to measure carbon dioxide (CO2), and methane (CH4) mixing ratios at high latitudes using oxygen A-band measurements as a surface pressure reference. This thesis details the optical design, instrumental setup, and development criteria for the IFTS. The development of a software package to control and acquire data is also discussed. The instrument is developed to achieve the Technology Readiness Level 4 standard which covers the breadboard validation of a space system in a laboratory environment. Hardware specifications and software algorithms of the instrument are presented. Results from an external Helium-Neon (HeNe) laser and a broadband light source limited by spectral bandpass filters are presented. Finally, recommendations and future improvements to this research and development program are listed.