title: Theoretical aspects of Fourier Transform Spectrometry and common path triangular interferometers.
abstract: Recent investigations have induced relevant advancements of imaging interferometry, which is becoming a viable option for Earth remote sensing. Various research programs have chosen the Sagnac configuration for new imaging interferometers. Due to the growing diffusion of this technique, we have developed a self-contained theory for describing the signal produced by triangular FTSs and its optimal processing. We investigate the relevant disadvantages of multiplexing, and compare dispersive with FTS instruments. The paper addresses some methods for correcting the phase error, and the non-unitary transformation performed by a Sagnac interferometer. The effect of noise on spectral estimations is discussed.
authors.affiliation: Consiglio Nazionale delle Ricerche-Istituto di Fisica Applicata Nello Carrara, Area di Ricerca di Firenze del CNR, Via Madonna del Piano, 10, 50019, Sesto Fiorentino, Italy. a.barducci@alice.it
authors.forename: Alessandro
authors.initials: A
authors.lastname: Barducci
authors.forename: Donatella
authors.initials: D
authors.lastname: Guzzi
authors.forename: Cinzia
authors.initials: C
authors.lastname: Lastri
authors.forename: Paolo
authors.initials: P
authors.lastname: Marcoionni
authors.forename: Vanni
authors.initials: V
authors.lastname: Nardino
authors.forename: Ivan
authors.initials: I
authors.lastname: Pippi
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D017550:Spectroscopy, Fourier Transform Infrared / Q000295:instrumentation*