DDOTI is a wide-field robotic imager with an instantaneous field of view of about 72 square degrees. DDOTI stands for “Deca-Degree Optical Transient Imager”.
The key science goals of DDOTI are the localization of the optical transients associated with relativistic stellar transients — gamma-ray bursts detected by the GBM instrument on the Fermi Gamma-Ray Space Telescope and with gravitational-wave events detected by LIGO and Virgo. These transients typically have positional uncertainties of order 100 square degrees, and so their localization requires a wide-field imager like DDOTI.