Data Copy
CHCNAV ALPHAAIR-450 USER MANUAL | 2021-10 P a g e | 20
6 Data Copy
6.1 Introduction of the data
▪ ALPHA_CAM: The photos are stored in the DCIM.
▪ ALPHA_LAS: The data is grouped according to the collection date，For example, 20210820
indicates the data collected on August 20, 2021.
▪ A complete project consists of four files:
xxxxxx_I.imr, IMU data.
xxxxxx_S. cil, Synchronizes data.
xxxxxx_T.gps,GNSS data.
xxxxxx_L.pcap, Reserved data interface, for DMI data.
▪ xxxxxx.CP: Camera calibration file.
▪ xxxxxx.EP: Laser calibration file.
6.2 Automatically data copy
▪ Connect the device to the computer with type-c to USB data cable, the computer will pop
up two SD cards ALPHA_LAS and ALPHA_CAM
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