  The paper presents an analysis of dual-polarization observations of the Crab
pulsar obtained on the 64-m Kalyazin radio telescope at 600 MHz with a time
resolution of 250 ns. A lower limit for the intensities of giant pulses is
estimated by assuming that the pulsar radio emission in the main pulse and
interpulse consists entirely of giant radio pulses; this yields estimates of
100 Jy and 35 Jy for the peak flux densities of giant pulses arising in the
main pulse and interpulse, respectively. This assumes that the normal radio
emission of the pulse occurs in the precursor pulse. In this case, the
longitudes of the giant radio pulses relative to the profile of the normal
radio emission turn out to be the same for the Crab pulsar and the millisecond
pulsar B1937+21, namely, the giant pulses arise at the trailing edge of the
profile of the normal radio emission. Analysis of the distribution of the
degree of circular polarization for the giant pulses suggests that they can
consist of a random mixture of nanopulses with 100% circular polarization of
either sign, with, on average, hundreds of such nanopulses within a single
giant pulse.
