A Synchronized Data Acquisition System in the Multi-Channel Observation System on the NVST of the YNAO

In order to achieve synchronized multi-wavelength high-resolution image reconstruction with the multi-channel high-resolution observation system on the NVST (New Vacuum Solar Telescope) of the Yunnan Observatories, data of the multiple channels need to be synchronously recorded. In this paper we present our study of realization of the needed synchronous recording. Our approach combines externally triggered working modes of the CCD cameras, technologies of interrupting computer PCI bus hardware, and the GPS time system. Using the approach we have built a system to achieve synchronized data acquisition with the NVST multi-channel observation system. In this paper we also introduce an experimental platform built on the existing Hα and TiO imaging channels. Through a series of experiments, such as timing sequence analyses of waveforms, data recording, and data analyses, we show that our system can meet the requirements of synchronous recording with the NVST multi-channel observation system.