Having trouble remembering what wavelengths and frequencies those radio
bands are at?
Fear no more: use this handy table:

                                                   
Band                        Wavelength (cm)            Frequency (GHz)
 P                              90                          0.327
 L                              20                          1.4
 S                           15 - 7.5                      2 -  4
 C                              6.0                         5.0
 X                              3.6                         8.5
 U                              2.0                        15
 K                              1.3                        23
 Q                              0.7                        45

See also http://www.ukaranet.org.uk/basics/frequency_allocation.htm