Observations
On November 17, 2004 GBT receiver checkout observations were performed for
the PF1 450 MHz band receiver. Serveral scans to identify RFI in the
nominal receiver bandpass were made as part of these observations. The
spectral processor was used for these observations.
The spectral processor was setup to provide a 40 MHz instantaneous bandwidth.
Observations were taken at 405, 445, 485 and 500 MHz to cover the nominal
receiver bandpass of 385 to 520 MHz. Observations were made in both linear
and circular polarization.
The data are taken from calibrated scans of OnOff observations towards
3C 286. The data have been calibrated so that the weaker RFI shows
up in the plots. This means that some, if not most, of the RFI can appear
as negative spikes. Many scans have been added together so the intensity
scale should be interpretted as arbitrary in the plots below.