Kosmos-49 operated from 24 October to
3 November, 1964, 11 d in total. It performed 162 orbits around the Earth and made 17 300 measurements covering 75 % of the Earth’s surface almost homogeneously. It had an orbit with an inclination of 49◦, nodal period of 91.83 min,
apogee of 484 km, and perigee of 265 km. During the mission the apogee decreased from 487 to 472 km approximately linearly in time. The accuracy of satellite position was 3 km along the trajectory and 1 km in the transverse direction, and the accuracy of timing was about 0.5 s.
A homogenous survey, performed within a short period of time, provided a general image of the Earth’s magnetic field free of secular variations and allowed scientists to map its distribution on the date of the experiment. The collected data
were used for obtaining the international analytical model of the Earth’s magnetic field.
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