Possibility oF Estimating Wheat Canopy Temperature by Using Remote Sensing Technique

Fakharizadeh, Elham; Nazemalsadat, Seyedmohammadjaafar; Falahshamsi, Seyedrashid; Kamgarhaghighi, Aliakbar

Possibility oF Estimating Wheat Canopy Temperature by Using Remote Sensing Technique

Document Type : Research Paper

Authors

¹ Corresponding author, M.S of Agro Meteorology –Shiraz University

² Water Engineering Department –of Shiraz University- Agriculture faculty Proposer

³ Water Engineering Department –of Shiraz University- Agriculture faculty Prop Assistant

Abstract

Canopy temperature is an important factor for irrigation scheduling. This is because canopy temperature is depend plant water status. This research evaluated usefulness of Modis sensor for estimating wheat canopy temperature. Relationship between temperature and values of digital satellite images were determined on different levels of plant height and then models were evaluated. Based on the results, the best correlation between the temperature of the green cover were with band 34&25, band 3 and band 2 in the special resolution of 1000 m, 500m and 250m respectively, and RMSE was equal to 3.6, 3.6 and 5.3 in the special resolution of 1000 m, 500m and 250m respectively. Lowest error was observed at the top of canopy and maximum error was at the bottom of plant. Result showed that measuring canopy temperature by using remote sensing is possible but magnitude of error showed that models need some modification.

Keywords