The IJICS (International Journal of Informatics and Computer Science) Vol 5 No 1, March 2021, Page 57-63 ISSN 2548-8384 (online), ISSN 2548-8449 (print) Available Online at https://ejurnal.stmik-budidarma.ac.id/index.php/ijics/index DOI 10.30865/ijics.v5i1.2954 Estimation Chlorophyll-a Using Landsat-8 Imagery in Shallow Water: Effect of Atmospheric and Algorithm Abdi Sukmono*, Lilik Kristianingsih Department of Geodetic Engineering, Faculty of Engineering, Diponegoro University, Semarang, Indonesia Email: 1,*
[email protected],
[email protected] Coressponding Author: 1,*
[email protected] Submitted: 06/03/2021; Accepted: 28/03/2021; Published: 29/03/2021 Abstract−Chlorophyll-a estimation using remote sensing technology is being challenged to improve its accuracy. Various algorithms and correction methods need to be studied, including the influence of the atmosphere. It can influence the passage of the electromagnetic wave from the sun to the object and from the object to the sensor that makes the difference on the image reflectance. There are two kinds of reflectance; which are ToA (Top of Atmosphere) reflectance and BoA (Bottom of Atmosphere) reflectance. ToA reflectance is the reflectance captured by the sensor yet BoA reflectance is the reflectance of the object corrected by the atmosphere. ToA reflectance is produced by radiometric calibration while BoA reflectance is made of atmospheric correction process. This research studies aims to compare those to reflectance to investigate the impact of atmospheric correction usage on chlorophyll-a case study. The waters of Wedung district is chosen as the research field because it is the largest area in Demak regency.