TEEEJ refers to traffic analysis by the Luftwaffe. I read a book a number of years ago of the History of the RAF Y-Service. I can't find details of the book but I did find some text by Peggy West and the wording was very similar.
IIRC the book sort of slipped in to publication and I seem to recall that there was dismay about it at the time. One feature was how the Y-Service in Malta was able to ensure that the defending fighters were on CAP at the extreme range of radar cover before the enemy bombers penetrated. Rather than a ground alert and late interception the bombers were harried all the way in.