The NINA apparatus, on board the Russian satellite Resurs-01 No. 4, has bee
n in polar orbit since 1998 July 10, at an altitude of 840 km. Its main sci
entific task is to study the Galactic, solar, and anomalous components of c
osmic rays in the energy interval 10-200 MeV nucleon(-1). In this paper we
present a description of the instrument and its basic operating modes. Meas
urements of Galactic cosmic-ray spectra will also be shown.