Multi-Band All-Sky Imaging And Radiation Observation System

Clouds play a key role in the Earth's climate system because of their critical impact on the atmospheric energy balance and the hydrological cycle.Detailed knowledge of the radiative properties and image properties of clouds,is crucial for the study of climate and climate change.This project aims to establish a Multi-band all-sky imaging and radiation observation system,measuring the direct solar radiation,the sky diffuse radiation and the whole sky images,providing data source for analysis of cloud properties.This project was designed and implemented a Multi-band all-sky imaging and radiation observation system,the system mainly consists of three parts:the instruments of multi-band all-sky imaging,calibration system of instruments and data acquisition and management system in server side.Multi-band all-sky imaging and radiation observation instrument with Raspberry Pi3(open source computer system)as control core,the Arduino DUE(microcontroller open source hardware)is responsible for real-time tasks and synchronization of capturing the whole sky image,the sun direct radiation and scattering sky,environmental temperature and humidity,location information and status information,immediately upload these data to the data acquisition and management system running in servers.Calibration system uses an asynchronous message queue Celery as the control center,implements the Cosine correction,absolute correct,linearity correction,spectral correction,image position correction and other distributed calibration,realizes calibration data centralized management.The data acquisition and management system based on open source IOT platform PandoCloud,added a distributed file system FastDFS in its core layer increased and increased and file uploading in the interface layer,to satisfy the whole sky images and mass small files storage needs of scan data.In addition,the API of PandoCloud and Django framework are both used to develop the data visualization and real-time control of instrument.20 instruments were deployed at first stage,the practical operation show that the system is stable,flexible for deployment,convenient extension,the server-side data collection and management system had run without any serious problems so far,environmental adaptation ability and high precision data observation instrument,it is of great significance to the atmospheric research,modern IOT network with small amount of equipment and needs of data collection and management,and has reference value for upper application service architecture.