Modified version of the TIROS N/NOAA A-G satellite series (NOAA E-J) advanced TIROS N (ATN)

The TIROS N/NOAA A-G satellites described in NOAA Technical Memorandum NESS 95 were modified to add payload capacity without changing the basic environmental mission of the series. Three additional satellites are being added to the initial procurement to extend the lifetime of the program to the end of the decade. Incrementally added to the payload will be a search and rescue demonstration system, an Earth radiation budget experiment, and an operational solar backscatter ultraviolet radiometer which will monitor the distribution of ozone in the atmosphere. Characteristics of the real time data links (APT, HRPT and DSB) will not be changed by the addition of these instruments.