The detection of a giant pulse at the VLA was used as a trigger, sent via internet, to a computer at Green Bank to trigger the start of data acquisition of the pulse at 0.61 GHz. During 1995-1999 the propagation parameters of the Crab pulsar have been violently variable. The interpretation is that the line of sight passed through a particularly disturbed region of the nebular interface between the expanding synchrotron emitting region and the supernova ejecta. A second paper is in preparation that will cover the entire period up to present and incorporate history of propagation activity going back to 1969. Note that both 85-3 and the GBI are potentially usable for other types of observing programs.
Offers are welcome.
At the moment A. Roshi is exploring use of 85-3 for studies of low frequency recombination lines. The 610-MHz IF will be linked to the NRAO Spectral Processor.