aha ! Just de-classified....
This is, I infer, related to the Bedford Experiments (Cape Cod Experiments) to use Whirlwind computer to track invading aircraft. Page 2 mentions a suspension in experiments due to engine trouble of the B-25 in which the airborne equipment is located., mentions interuption because an F-51 was sent for repairs. Also talks about sending 3 sets of radar data per phone line.
1 February 1952
Digital Computer Laboratory
http://dome.mit.edu/bitstream/handle/1721.3/39384/MC665_r06_M-1389.pdf page 7.
An outline has been written up for a set of programs which will allow us to test parts of the Cape Cod Muldar Program before the magnetic drum equipment arrives from E.R.A. The proposal is to record on magnetic tape blocks of filtered radar data from 1, 2, or 3 radar sets. The computer would carry out the necessary filtering and recording operations. A second program would then be read into the computer which would process the radar data on the magnetic tape, a block at a time. In this way, the processing program could be completely7 divorced from real time, allowing us a great deal of flexibility in testing various information processing methods.