Product parameters TOPODRONE DJI AIR 2S PPK Upgrade KIT is an upgrade module installed on the DJI Air 2S drone, which is connected to the camera shutter and allows you to record raw GNSS measurements along with timestamps of the shutter triggering moments. This module consists of the following main parts: Upgrade TOPODRONE DJI Air 2S PPK Upgrade KIT Helix HX-CH6601A external GNSS antenna . This antenna is installed on the upgrade board to receive satellite signals from various navigation satellite systems. To perform aerial photography with high accuracy, this antenna must be securely fixed. The drone can be used without an antenna, but GNSS data will not be recorded when updating. The green light   indicates that the DJI Air 2S drone is powered on. This LED is solid green to indicate that the upgrade is powered on. If the green LED on an installed upgrade does not light up when power is turned on, it means that the upgrade is not installed correctly or is defective. The blue light indicates the GNSS signal quality level of the external GNSS antenna. It may light up constantly, blink with different frequency, or not light up at all. A quality GNSS signal corresponds to a constant blue LED signal. It is switched on only after initialization. Status Description Not lit PDOP>10 Slowly flashing 3