The Nimbus 7 Users' Guide. C. R. Madrid, editor. Goddard Space Flight Center.
Equatorial crossings are local noon for ascending node and local midnight for descending node.
Spacecraft inclination is 99.1 degrees, with a leeward latitude of 80.77 degrees. Orbital period is 104.15 minutes, and consecutive equator crossings are separated by 26.1 degrees longitude. The spacecraft has three major structures that house power, attitude control and information flow components. The spacecraft's base is a hollow, torus-shaped sensor mount containing electronics equipment and battery modules. The lower surface of the torus provides mounting space for sensors and antennas.