Landsat 2 is the second satellite of the Landsat program. The spacecraft
originally carried a designation of ERTS-B (Earth Resource Technology Satellite
B) but was renamed &Landsat 2& prior to its ... launch on January 22, 1975. Despite
having a design life of one year, Landsat 2 operated for over seven years,
finally ceasing operations on February 25, 1982.
As in the case of its predecessor Landsat 1, the satellite's payload included
two remote sensing instruments, the Return Beam Vidicon (RBV) and the
Multi-Spectral Scanner (MSS). The specifications for these instruments were
identical to those of the instruments carried on Landsat 1. (This was not the
case for Landsat 3, which added a short-lived thermal band to the MSS
instrument.) The data acquired by the MSS was considered more scientifically
useful than the data returned from the RBV, which was rarely used and
considered only for engineering evaluation purposes.
[Summary provided by NASA.]