CCTV's First 4K Aerial Broadcast: Dagong Technology's Tethered UAV Breaks Endurance, Wind, and Signal Records at National Day Celebration
Beijing, China — On October 1, 2019, hovering 300 meters above Tiananmen Square, a silent technological revolution unfolded before a global audience. Beijing Dagong Technology Co., Ltd.’s tethered UAV system made history as CCTV's first-ever aerial platform for 4K ultra-high-definition live-streaming during the 70th Anniversary National Day Celebration. Empowered by three unprecedented technical breakthroughs—24-hour endurance, Level 12 wind resistance, and zero signal interruption—the system delivered breathtaking "God's Eye" visuals of the festivities, unequivocally establishing the tethered drone as the ultimate victor in large-scale broadcast logistics.
For decades, aerial live-broadcasting was throttled by two insurmountable bottlenecks: the 30-minute battery curse of conventional UAVs and the susceptibility of wireless transmissions to urban electromagnetic interference. Dagong Technology neutralised both threats with a single engineering marvel—a specialized photoelectric composite tether cable. Serving as an "umbilical cord linking sky and earth," this cable fed continuous ground power to the drone, unlocking 24-hour uninterrupted hovering, whilst its internal fibre-optic core transmitted uncompressed 4K video directly to the broadcast truck with zero latency.
However, the 70th Anniversary presentation demanded a monumental leap in capability. Having proven the concept at the 2017 BRICS Summit and the 2018 Hong Kong-Zhuhai-Macao Bridge inauguration, Dagong Technology faced a staggering new requirement: a bandwidth escalation from 1.5G to a colossal 12G to satisfy broadcast-grade 4K standards.
To execute this, Dagong Technology’s engineering team, comprised of elite alumni from Tsinghua University and Beihang University, integrated a 10-kilogram broadcast-grade 4K camera pod onto the aerial platform. Furthermore, they pioneered a remote parameter control system, empowering CCTV directors to meticulously adjust aperture, shutter speed, and white balance in real-time, ensuring the aerial feed perfectly matched the colour grading of ground-level cameras. Through rigorous optimisation of flight control, image stabilisation, and data transmission, the tethered UAV achieved flawlessly smooth升降, panning, and zooming under the director's precise commands.
The triumphant deployment at Tiananmen Square was underpinned by Dagong Technology's three core technical breakthroughs, which have since made tethered UAVs the preferred choice for mainstream media:
1. Level 8 Wind Resistance & Extreme Stability: Armed with a dual-redundancy flight control system and proprietary anti-wind algorithms, the drone maintained a hovering precision error of strictly under 0.3 meters even in Level 7 gales—a critical asset for unpredictable outdoor broadcasts.
2. Uninterrupted Endurance & High Safety: The tether connection physically prevents fly-away incidents. In the event of a ground power failure, the system autonomously switches to a backup power supply, executing a safe landing within 30 seconds.
3. Zero-Interruption 12G Transmission & Rapid Deployment: Transportable and deployable in under 5 minutes, the system guarantees 12G bandwidth signal stability, whilst offering multi-mission versatility to act as an "aerial signal tower" for concurrent communication coverage.
As a low-profile yet formidable technological leader holding over 70 technical patents, Beijing Dagong Technology has fundamentally redefined the possibilities of aerial photography. Looking forward, the integration of 5G networks and AI-driven intelligent analysis will elevate these tethered UAVs from mere "aerial cameramen" to comprehensive "aerial sensing platforms." Whether serving as an "aerial sentry" for national defence reconnaissance or an emergency communication hub, Dagong Technology continues to prove that in the era of ultra-high-definition broadcasting, a single resilient tether is the key to unlocking the skies.