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Air Density at Heights Near 190 Km in 1966-7, from the Orbit of Secor 6
Comparison of Air Densities Derived from the Orbits of 1965-51 A, B and C
The Upper Atmosphere and Its Influence on Satellite Orbits
AIR DENSITY AT HEIGHTS NEAR 180 KM IN 1968, AND FROM 1969 THE ORBIT OF 1967-31A
Variations in Air Density at a Height of 480 Km, from the Orbit of Midas 2
Air Density at Heights Near 150 Km in 1970, FROM THE Orbit of Cosmos 316 (1969-108A)
Geophysical Research Based on Visual Observations of Satellites
Variations in Air Density at Heights Near 150 Km, from the Orbit of the Satellite 1366-101 G