exposure time over which photons were collected in the detector array prior to readout and processing to generate star positions or attitude
NOTE 1 Integration time can be fixed, manually adjustable or autonomously set.
NOTE 2 Figure 3-8 illustrates schematically the various times defined together with their inter-relationship. The figure includes data being output from two Optical Heads, each of which is separately processed prior to generation of the sensor output. Note that for a Fused Multiple Optical Head sensor conceptually it is assumed that the filtered output is achieved via sequential processing of data from a single head at a time as the data is received. Hence, with this understanding, the figure and the associated time definitions also apply to this sensor configuration.