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.
1 An abdominal hernia with an external bulge in the groin region. 2  It can be classified by the location of herniation. 3  Indirect inguinal hernias occur through the internal inguinal ring.4  Direct inguinal hernias occur through defects in the abdominal wall (transversalis fascia) in hesselbach's triangle. It can be classified by the location of herniation. 2  Indirect inguinal hernias occur through the internal inguinal ring. 3  Direct inguinal hernias occur through defects in the abdominal wall (transversalis fascia) in hesselbach's triangle.