Raw Image data products ======================= Readout modes ************* Single ------ In single mode, the detector is readout after a reset. After the readout, the detector is reset gain. This readout mode has limited utillity and it is meant for engeneering. The frame contains a single HDU. The data section of the HDU contains the 2048x2048 dataframe. In the header, the following keywords are set :: READPROC = F / The frame has been preprocessed after readout READMODE = ‘SINGLE’ / The readmode used to adquire the image Correlated double sampling -------------------------- In correlated double sampling, the detector is reset, then read inmediately after the reset and then read after the programed exposure time. The frame contains a single HDU. The data section of the HDU contains a 2048x2048x2 dataframe. The first layer contains the readout after reset and the second the readout after the exposure time. In the header, the following keywords are set :: READPROC = F / The frame has been preprocessed after readout READMODE = ‘CDS’ / The readmode used to adquire the image Fowler ------ Fowler mode is an extension of CDS. The detector is reset, then read ``n`` times, exposed and then read agin ``n`` times. The exposure time in this case is equal to the time between correlated reads. The frame contains a single HDU. The data section of the HDU contains a 2048x2048x2n dataframe. The first ``n`` layers contain the readouts after reset and the second ``n`` the readouts after the exposure time. In the header, the following keywords are set :: READPROC = F / The frame has been preprocessed after readout READMODE = ‘FOWLER’ / The readmode used to adquire the image READSAMP = 2*n / Number of samples taken Follow-up-the ramp ------------------ In ramp mode, the exposure time is sampled ``n`` times. The frame contains a single HDU. The data section of the HDU contains a 2048x2048xn dataframe. Each layer contains the n-th readouts after reset. In the header, the following keywords are set :: READPROC = F / The frame has been preprocessed after readout READMODE = ‘RAMP’ / The readmode used to adquire the image READSAMP = n / Number of samples taken Image types *********** Bias ---- Dark ---- Flat ---- Target ------