ew back-scattered thermal radiation, The twenty one basic thermal instru- ments poSseS8ed various fields of view and were suitably filtered to obtain qualitative spectral distribution information, All channels were recorded on Consolidated Recorders except the six back-scatter channels in the B-47 which were recorded on magnetic tape, The cameras were equipped with red and blue filters to obtain information at each end of the visible region of the spectrum. Several cameras were equipped with spectroscopic attachments to obtain continuous spectra in the visible region, Two of these spectrographs were operated at the E.CG.&. Chieerete (William) photo tower. AIRCRAFT POSITION IN SPACE Information of the position in space of each aircraft is contained$ in the reports of the following projects: Project 5.1 — B47 Project 5.3 - B-66 Project 5.2 - B52 Project 5.4 - B-57 yar COPIED Lani fe ~ 63-