ITOS (Improved TIROS Operating System)
A series of American weather satellites, launched between 1970 and 1976, which followed on from the TIROS series. ITOS-1 was also known as TIROS M but later spacecraft in the series were given NOAA (National Oceanic and Atmospheric Administration) designations after NOAA took over the management of the program from ESSA (Environmental Science Services Administration).
Related category SATELLITES AND SPACE PROBES
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