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Stroboscopic Method for Verification and Adjustment of the Timestamp in Occultations
JOA 2024, Vol. 14, No. 4, Page 17 Author(s): Javier de ElíasAbstract: This article shows a method for determining the timestamp accuracy of astronomical image captures. The method analyses the deviation between the timestamp associated with the images and the time given by a GPS PPS signal, achieving a sub-millisecond accuracy. The method has also been used to characterise the delays introduced by the readout time per line in most CMOS cameras due to the rolling shutter, which means that the position of the object to be measured in the image must be considered in order to determine the correct timestamp. By applying the method, we can characterise which offset to apply to our occultations and improve the accuracy of our measurements.