Satellite C-band usually transmits around 6 GHz and receives around 4 GHz. It uses large (2.4- 3.7 meter) antennas. These are the large white domes that you see on top of the cruise ships and commercial vessels.
Inferior Vena Cava Filter Placement and Removal. 1  During Inferior Vena Cava (IVC) filter placement, a filtering device is placed within the IVC, a large vein in the abdomen that returns blood from the lower body to the heart. Blood clots in the veins of the legs and pelvis can occasionally travel to the lungs where they may cause a pulmonary embolism or blockage.
For example: Some matte boxes have independently-rotatable filter trays. This allows a polarizer to be rotated separately from a graduated ND rotated at a different angle. That's a feature my old Vocas matte box doesn't have, and one I'd look for in a new one when I eventually replace it.-