5 First results

The first observations using the S2 baseband system for demonstration purposes were made of the Vela pulsar with the 64-m diameter telescope at Parkes, at 6-cm wavelength at left-circular polarization on September 30, 1995. The signal at the telescope was converted to baseband with a 16 MHz bandwidth, sampled at the Nyquist rate with 2-bit quantization, and written to an S2 recorder. At the processing center at ISTS/York University, the data were transferred to a workstation disk via the S2-TCI at the full S2 rate of 16 MBytes/s. The integrated profile of the pulsar is shown in Fig. 5.

  

Figure 5: The 60 second average pulse profile of the Vela pulsar at 6-cm wavelength shown for a full period. The output of a 16 MHz baseband channel was sampled at the Nyquist resolution of 31.25 ns, de-dispersed, and then smoothed for display purposes to a time resolution of 100 $\mu$s