. Some of the decisions of the FCC that affect radio astronomy are listed below: . 17oct06 NewsRelease: low power devices on unused tv channels (.ps) . 13may2004 (FCC 04-186): NPRM Unlicensed operation in the TV Broadcast Bands . 14oct2004 (FCC 04-245): Rules for broad band over power lines. 21Dec2001 (FCC 01-382): Reallocation of the 216-220,1390-1395,1427-1429,1429-1432,1432-1435,1670-1675,2380-2385 Mhz bands (.pdf) . home_~phil
... 2.3 Data acquisition Spectra generated by the Multibeam correlator contain the usual structure seen in spectra from other H i instruments: a bandpass spectrum which is the sum of the sky , ground and receiver temperatures multiplied by the product of the filters in the receiver chain; superimposed on this is a noise ... Note also that sources extended much beyond ,40 arcmin can be imaged poorly in HIPASS images because of the bandpass sidelobe effect described in Section 3.3. ...