<prompt> Iyini ubude bamaza obufushane be-oxygen? Njengoba kunikezwe umbuzo odlule, bhala umongo onempendulo yawo. Kungaba imisho engu-1 kuya kwengu-20. Umongo:  <response>: I-oxygen inezinhlaka ezimbili zokumunca i-spectrophotometric ezifinyelela esiqongweni kuma-wavelength angu-687 no-760 nm. Ososayensi abathile be-remote sensing baye basikisela ukuba kusetshenziswe ukukala imisebe evela emibhoshongweni yezitshalo kuleyo migqa ukuze kuchazwe isimo sempilo yezitshalo kusuka endaweni yesikhulumi sesathelayithi. Le ndlela isebenzisa iqiniso lokuthi kulezo zingqimba kungenzeka ukuhlukanisa ukubonakaliswa kwezitshalo kusuka ku-fluorescence yayo, ebuthakathaka kakhulu. Ukulinganisa kunzima ngokomthetho ngenxa yesilinganiso esiphansi sesiginali-nomsindo kanye nesakhiwo semvelo sezitshalo; kodwa kuye kwasikiselwa njengendlela engenzeka yokuqapha umjikelezo wekhabhoni kusuka kumasathelayithi esikalini somhlaba wonke. 