Secasse of uncertain traasaission through the cloud layer, ‘absolute irradiances measured for Orame are probably of lessened interest; relative spectral irradiances are also degraded by uncertainties in the spectral depentesce af Clad Cransmisaion. 11.3.3 Specrrography The spectrograph was, for both shots, directed toward air zero. Because of the Teak burst error, the wery narrow field of the spectrograph did not in™. clude the fireball proper. The spectrographic record does show a distiace a Teller spectrums as outlined below. For Orange, the cloud layer seriously re- duced exposure, so that little caca are discervible. A light leak in the fila transport oaechanisa seriously fogged film records for both shots, making an estimate of contimnm radiation, for example, very difficult. 11.4.4 Automatic Exposure Camera Results Teak filas from the automatic exposure control cameras show a few good early frames. Because a greater part of the luminescence was over in so short a tine, the filter mechanisa followed late, resulting in gross underexposure. Due Co erroneous shot position, only a portion of the fireball was within the field of view. Because of cloud cover during the Orange event, initial phases of the detonation were underexposed. At later time, the images are diffuse, again because of clouds, but exposure is more nearly correct. to indicate that che filter oechanisms functioned properly. This would seen However, mininal data recorded during both Teak and Orange is rot considered gigaificant. 11.4.5 Ballistic Plate Camera Results During Teak, one ballistic plate cazera recorded excellent data. A shutter failure occurred with the second capers and po data vere obtaised. Both caneras functioned during Oracge, but because of the cloud cover and resultant diffuse images, accuracy of the data is seriously limited. 11.5 IRSAD LANCE MEASTREMENTS 11.5.1 e Teak Measurements Figure 11.9 shows data from the narrow band-pass filter streax cazeras. 2 ue Tae irradiance is that iccident on the camera, having had no atmospheric aly bay ex. IS3 1s deleted.