The work compartment was dominated by the "Agat-1" Earth-observation telescope, which had a focal length of 6.375 metres and an optical resolution better than three metres, according to post-Soviet sources; NASA historian Siddiqi has speculated that given the size of the telescope's mirror, it likely had a resolution better than one metre. The telescope was used in conjunction with a wide-film camera, and was used primarily for military reconnaissance purposes. The cosmonauts are said to have observed targets set out on the ground at Baikonur. Secondary objectives included study of water pollution, agricultural land, possible ore-bearing landforms, and oceanic ice formation.