... People have been asking how cell phones transmissions affect observations done on the telescope. ... Three 50 Mhz bands centered at 1625, 1675, and 1725 Mhz were sampled once a second using the interim correlator. 2048 channels gave 48Khz resolution (after hanning smoothing). ... Each 1 second spectra was divided by this band pass correction. ... You can also see glonass at 1609, and iridium at 1620 to 1628 Mhz. dynamic spectra of the 1650-1700 Mhz band (.gif) . ... There are two frequency bands: . ...