I have tried downloading Landsat 8 imagery twice from USGS site but never came with band 10 and 11. Those two bands are really needed for my research. How do I get it downloaded?
Try to download old scene (2015, 2016) of your area because the nominal life time of TIRS instrument (who produced the bands 10, 11 ) is 3 years average.
In addition to the links provided by colleagues above, these are the few lists from which you could download FREE Landsat Images
1. USGS Earth Explorer https://earthexplorer.usgs.gov/
2. USGS Glovis https://glovis.usgs.gov/
3. USGS LandsatLook https://landsatlook.usgs.gov/
I have also prepared a short manual that could be of help to you to assessing the websites and download the Landsat images , especially the bands 10 and 11 you need for your research.
Please see attached copy of the manual prepared for you FREELY.
Qual é o objetivo de sua pesquisa. As bandas 10 e 11 elas são termais. Qual faixa do espectro eletromagnético você deseja utilizar? Sesan Abiodun Aransiola