Figure b. Onboard daca acquisition system. Individual signals from 

 the 4 scintillation detectors in the detector vehicle are fed through 

 cables to a mixer in the instrument bank. A differential discriminator 

 sorts the proper signals and feeds them to a multichannel analyzer 

 (center bank) . By means of a programmed interrogator (upper two banks) 

 time and line sequence data are coordinated with the radiation data 

 and read into the data display in real time and simultaneously onto 

 punched paper tape. Navigation data is supplied from the Cubic Auto- 

 tape interrogator (right). 



