Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 MHz and 3 GHz, also known as the decimetre band as the wavelengths range from one meter to one decimetre.ltra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 MHz and 3 GHz, also known as the decimetre band as the wavelengths range from one meter to one decimetre.
The San Diego Unified Port District was created in 1962 after the California State legislature passed Senate Bill 41 and the San Diego County Board of Supervisors certified it. The citizens, in 1964, approved a $10.9 million bond for capital improvements.
The San Ysidro Border Crossing at San Diego is home to the world's busiest land border crossing. It is where U.S. Interstate 5 crosses into Mexico at Tijuana. The San Ysidro Border Crossing is one of three ports of entry in the San DiegoâTijuana metropolitan region. San Ysidro Border Wait Times Phone Numbers. To check on waiting time at the U.S./Mexico checkpoints, call the corresponding numbers: