Nearly all C-band communication satellites use the band of frequencies from 3.7 to 4.2 GHz for their downlinks, and the band of frequencies from 5.925 to 6.425 GHz for their uplinks. Note that by using the band from 3.7 to 4.0 GHz, this C-band overlaps somewhat into the IEEE S-band for radars.
A ventral hernia occurs when a weak spot in the abdomen enables abdominal tissue or an organ (such as an intestine) to protrude through a cavity muscle area. These hernias are visibly identified by a bulge in the belly area. The most common sites for ventral hernias are the site of a previous abdominal procedure (an incisional hernia), the navel (an umbilical hernia), and the groin (an inguinal hernia). About 90,000 ventral hernia repairs are performed in the United States each year.
Incisional/ventral hernias are defects that appear at the site of a prior surgical incision. An incisional hernia can develop in the abdominal wall around a previous incision. It usually arises in the abdominal wall where a previous surgical incision was made. This results in a bulge or a tear in the area where the abdominal muscles have weakened. Incisional hernias can increase in size with time. A hernia occurs when part of an organ (usually the bowel or intestine) protrudes through a weak point or tear in the thin muscular wall that holds the abdominal organs in place. Hernias can develop around the navel, in the groin, or any place where you may have had a surgical incision.