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.
Inguinal hernia repair, also known as herniorrhaphy, is the surgical correction of an inguinal hernia. An inguinal hernia is an opening, weakness, or bulge in the lining tissue (peritoneum) of the abdominal wall in the groin area between the abdomen and the thigh. The surgery may be a standard open procedure through an incision large enough. This patient has an indirect inguinal hernia (A). To repair it, the surgeon makes an incision over the area and separates the muscle and tisses to expose the hernia sac (B). The sac is cut open (C), and the contents are replaced into the abdomen (D).