HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

A Simulation-Based Error Budget of the TES Method for the Design of the Spectral Configuration of the Micro-Bolometer-Based MISTIGRI Thermal Infrared Sensor

Abstract : In preparation of the micro-bolometer based MIcro Satellite for Thermal Infrared GRound surface Imaging (MIST-IGRI) mission, we study the error budget of the Temperature-Emissivity Separation (TES) method using several spectral configurations that differ in channel numbers, locations, and widths. The error budget quantifies the contribution of (1) the TES underlying assumption about emissivity spectral contrast, (2) the errors on atmospheric corrections, and (3) the instrumental noise. When dealing with atmospheric corrections, we consider errors on atmospheric temperature, water vapor content, and concentrations of CO2 and O3. To that end, we design an end-to-end simulator of MISTIGRI measurements in order to simulate the radiative and biophysical quantities involved in the data processing. We conduct numerous simulations over a wide range of realistic setups that include cavity effect, i.e., radiance trapping within vegetation canopy. In the case of micro-bolometer based sensing, the current study highlights that atmospheric and instrumental noises have similar impacts on the TES retrievals, with resulting errors twice as large as those due to the TES intrinsic assumption about spectral contrast, where the latter contributes to the TES error budget within the [0.005-0.009] interval for emissivity, and within the [0.3 K-0.4 K] interval for LST. Also, we show that retrieval performances of surface temperature are very similar across all considered MISTIGRI spectral configurations, with RMSE variation within 0.2 K.
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-03382651
Contributor : Frédéric Jacob Connect in order to contact the contributor
Submitted on : Monday, March 21, 2022 - 1:39:15 PM
Last modification on : Friday, May 20, 2022 - 9:04:12 AM

File

z50-oa-file2.pdf
Files produced by the author(s)

Identifiers

Citation

Frédéric Jacob, Thomas Vidal, Audrey Lesaignoux, Albert Olioso, Marie Weiss, et al.. A Simulation-Based Error Budget of the TES Method for the Design of the Spectral Configuration of the Micro-Bolometer-Based MISTIGRI Thermal Infrared Sensor. IEEE Transactions on Geoscience and Remote Sensing, Institute of Electrical and Electronics Engineers, 2021, 60, 19 p. ⟨10.1109/TGRS.2021.3099896⟩. ⟨hal-03382651v2⟩

Share

Metrics

Record views

200

Files downloads

83