The S3U-0g device is specifically designed to simulate zero-gravity conditions during antenna deployment in ground test activities. This device features a rotating interface connected to a bridge crane, along with balancing masses that can be manually adjusted for precise operation. It also includes a real-time display to monitor battery charge levels, a load cell with Bluetooth data transmission capabilities, and redundant safety systems to prevent accidental drops. Additionally, the device offers fine adjustment controls and adjustable interfaces to accommodate the antenna. The S3U-0g is manually operated, providing flexibility and control during testing.