A polar orbit is when a satellite or object travels around the Earth from north to south or vice versa, passing over the polar regions. Full definition
The ice coverage has been documented since 1973 by means of passive microwave sensors on polar orbiting satellite. (www-das.uwyo.edu)
The transition to a near - circular polar orbit is a tricky adjustment. (newscientist.com)
In a broad sense, whereas these new vistas come courtesy of Juno, which launched in 2011 and swooped into polar orbit around Jupiter just over a year ago, their true source is the spacecraft's most modest instrument — a camera called JunoCam considered so scientifically unremarkable that it was given a barebones operational budget and officially included only for «public outreach.» (scientificamerican.com)