Qianhai Technology and Beijing Weather Modification Center have reached a consensus on the maintenance plan for 4 microwave radiometers and 1 lidar, and the two parties signed a service contract for the operation and maintenance of lidar and other equipment for a period of one year.

During the operation and maintenance service, Qianhai Technology strictly followed the agreement between the two parties, and arranged technical engineers to go to the user's site six times before and after to inspect and maintain the microwave radiometer and lidar equipment, and conduct inspection and maintenance of the equipment and timely troubleshooting. After calibration and maintenance, the equipment is running normally, and the observed data is normal, which ensures the good operation of the microwave radiometer and lidar equipment.

1. The main maintenance items of microwave radiometer are as follows:

(1) Inspection of equipment operation status (including software, hardware and data integrity inspection; (2) Dust removal and cleaning inside and outside the main unit of the equipment; (3) Dust removal and cleaning inside the blower; (4) Replacement of the fan filter (5) Cleaning (6) Calibration of liquid nitrogen and TIP; (7) Equipment level adjustment; (8) Cleaning and maintenance of S3 temperature and humidity sensor; (9) Cleaning and maintenance of rainfall sensor; (10) Maintenance of IRT infrared temperature measurement (11) Ensure the data transmission of 4 microwave radiometers.

 Figure: Comparison before and after maintenance

Figure: Microwave Radiation Liquid Nitrogen Calibration of Beijing People's Film Office

2. The main items of standard lidar maintenance are as follows:

(1) Equipment hardware status; (2) Software operating environment; (3) Data integrity; (4) Cleaning the observation window; (5) Cleaning the radar lens; (6) Maintaining the temperature sensor; (7) Maintaining the particle counter; (8) The observation data is transmitted to the server designated by the user.

Figure: Comparison before and after maintenance