Techniques for detecting defects on semiconductor wafers are described. In particular, low odor and lowno VOC compositions having dual functionality as both acid wash and sanitizing compositions are disclosed. The antenna-specific pilot is transmitted as an out-band pilot to provide optimal beam selection. The first tooth space 94 has a root portion 126 which includes first and second fillets 132, 136. The nucleic acids may have nucleotides deleted andor replaced to modify the amino acid sequence of human thyrotropin receptor. A rearward scene may be imaged with a second camera assembly to generate rearward scene image data.