August 2, 2018 - China Launches New Earth Observation Satellite

The date in your search needs a small correction — China launched the Gaofen-6 earth observation satellite on June 2, 2018, not August 2. It lifted off at 12:13 p.m. Beijing Time from Jiuquan Satellite Launch Center aboard a Long March-2D rocket. Gaofen-6 weighs around 1,064 kg and operates in a sun-synchronous orbit at roughly 634 km altitude. If you keep exploring, there's a lot more to uncover about what makes this satellite uniquely capable.

Key Takeaways

• The satellite launched was Gaofen-6, part of China's high-resolution Earth observation program (CHEOS), though the correct launch date was June 2, 2018.
• Gaofen-6 lifted off from Jiuquan Satellite Launch Center at 12:13 p.m. Beijing Time aboard a Long March-2D rocket.
• The satellite carries two cameras: a 2 m panchromatic high-resolution camera and a 16 m wide-field-of-view camera with eight spectral bands.
• A secondary 22 kg payload, Luojia-1, was co-launched to prototype a future 60–80 satellite night-light imaging constellation.
• Gaofen-6 operates in a sun-synchronous orbit at approximately 634–647 km altitude, with a designed lifespan of 8 years.

What Is the Gaofen-6 Earth Observation Satellite?

The Gaofen-6 is a Chinese Earth observation satellite that took off on June 2, 2018, and has been continuously archiving global imagery ever since. Built by SAST on the CAST2000 bus configuration, it weighs between 1,064 and 1,080 kg and carries a designed lifespan of 8 years. It operates in a sun-synchronous orbit at roughly 634–647 km altitude, completing each orbit in about 97.62 minutes.

Its satellite capabilities extend across two camera systems, delivering imagery from 2 m panchromatic resolution to an 800 km wide-angle swath. Spectral bands range from visible light to near-infrared, supporting agricultural monitoring applications like crop yield estimation and disaster assessment. You'll also find it compatible with Sentinel-2 data, enabling seamless multi-sensor observation integration. It was launched aboard a CZ-2D rocket from China's Jiuquan space center.

The Gaofen project, which began in 2010, was initiated with the purpose of reducing China's dependence on foreign remote sensing satellite data, and Gaofen-6 represents a continued step forward in that mission. Much like how Cai Lun's papermaking process transformed Chinese administration by enabling broader documentation and record-keeping, Gaofen-6 advances China's ability to independently document and monitor its own territory and agricultural resources.

How Gaofen-6 Launched on August 2, 2018

Before diving into the launch details, it's worth noting that Gaofen-6 actually lifted off on June 2, 2018, not August 2 — no records support an August 2 launch date, and sources including Xinhua, CNSA, and Gunter's Space Page consistently confirm June 2 as the correct date.

Factchecking the launch date matters because mission confusion around the Gaofen series is common, given how rapidly China expanded its Earth observation fleet that year.

Timeline verification points to a 12:13 p.m. Beijing Time liftoff aboard a Long March-2D rocket from Jiuquan Satellite Launch Center, pad LC-43/94. The mission marked the Long March series' 276th flight.

Luojia-1 co-launched as a secondary payload. Gaofen-6 was developed by China Aerospace Science and Technology Corporation and was designed for an operational life of eight years.

Possible confusion stems from Gaofen 11-01's July 31 launch, which likely distorted the launch date in circulation. The satellite weighs 1,064 kg and primarily serves Earth observation functions focused on agricultural resources research and disaster monitoring.

The Long March-2D Rocket and Its Luojia-1 Hitchhiker

Carrying Gaofen-6 into orbit on June 2, 2018, the Long March-2D is a two-stage rocket manufactured by the Shanghai Academy of Spaceflight Technology (SAST), standing 41.1 meters tall with a 3.35-meter diameter and a liftoff mass of 232 metric tons.

Its rocket propulsion system generates 2,961 kN of thrust using hypergolic UDMH fuel and N2O4 oxidizer. The rocket made its maiden flight on 9 August 1992, initially delivering FSW-2 reconnaissance satellites into orbit.

The payload integration included Luojia-1 as a 22-kg secondary hitchhiker alongside Gaofen-6. Luojia-1 was built by Wuhan University, serving as a prototype for a future constellation of 60 to 80 Earth observation satellites. The satellite's onboard computing systems rely on the stored-program concept, which allows instructions and data to share the same memory, enabling flexible reprogramming without hardware modifications.

Here's what makes this mission remarkable:

1. Luojia-1 orbits at 634×647 km at 98.05° inclination
2. Night-light imaging captures 250 km-wide swaths at 130-meter resolution
3. 15-bit dynamic range enables sensitive luminous detection
4. Prototype for a 60-80 satellite constellation supporting global economic monitoring

What Makes Gaofen-6's Camera Resolution and Spectral Bands Different?

While Luojia-1 focused on nighttime light detection from its 634 km orbit, Gaofen-6's real strength lies in its two complementary imaging systems — the High Resolution (HR) camera and the Wide Field of View (WFV) camera — which serve fundamentally different observational purposes.

The HR camera delivers sharp PAN details at 2 meters and multispectral imagery at 8 meters across a 90 km swath. The WFV camera sacrifices resolution for coverage, capturing an 800 km swath at 16 meters across eight spectral bands. You'll notice spectral overlaps with Sentinel-2's MSI sensor in visible, near-infrared, and red edge regions, though WFV's 10-bit radiometric depth falls short of Sentinel-2's 12-bit. Together, both cameras give Gaofen-6 flexible capability for both detailed and large-scale Earth monitoring. Band registration across the WFV's eight spectral bands achieves an RMSE of approximately 0.3 pixels, confirming reliable multispectral co-registration performance.

The WFV camera's exceptionally wide 65.64° field of view — compared to Sentinel-2 MSI's 20.6° — means that BRDF correction is necessary to achieve radiometric consistency when harmonizing WFV imagery with narrower field-of-view sensors. This wide-area imaging capability echoes the design philosophy behind Anik A1's shaped beam coverage, which similarly prioritized broad geographic reach over localized precision to serve remote and distributed communities across a vast national territory.

Why Gaofen-6 Prioritized Agriculture and Disaster Monitoring?

Gaofen-6's mission priorities didn't emerge arbitrarily — China's agricultural sector manages over 130 million hectares of farmland and faces recurring threats from droughts, floods, and crop disease, so the satellite's design directly reflects those national stakes.

You can picture its precision agriculture and disaster resilience capabilities through four practical realities:

1. Chlorophyll mapping across corn, rice, and soybean fields reveals nutritional deficiencies before harvests fail
2. Flood tracking captures near real-time landscape changes as water engulfs farmland
3. Drought monitoring identifies stressed vegetation zones across vast territories simultaneously
4. Post-disaster assessment documents recovery progress through archived time-series imagery since 2018

These aren't passive observations — they directly inform government responses, reduce dependence on foreign satellite data, and protect food security at a national scale. Gaofen-6 is part of a broader Chinese high-resolution Earth observation series that began with Gaofen-1 in 2013 and now includes more than 12 satellites, collectively strengthening the country's independent environmental monitoring infrastructure. For analysts and researchers requiring access to this data, archived Gaofen 6 imagery supports large-area land monitoring and ecological analysis across extensive territories.

Where Gaofen-6 Sits in China's Satellite Constellation

Understanding what Gaofen-6 monitors is only part of the picture — you also need to know where it sits within China's broader satellite architecture to appreciate its full strategic value.

In terms of constellation placement, it follows Gaofen-1 (2013) and Gaofen-4 (2015) while preceding Gaofen-11 and later SAR-focused platforms. Within the satellite hierarchy, it bridges early optical SSO missions and China's expanding GEO and SAR capabilities. It complements Gaofen-3's C-band radar at 757 km and pairs with Gaofen-4's geostationary coverage to eliminate observational gaps. The broader program it belongs to, CHEOS, was proposed in 2006 and officially approved in 2010 to coordinate space-based, near-space, and ground systems for national monitoring needs.

China's commercial remote sensing ambitions run parallel to these state-led efforts, with Chang Guang Satellite Technology operating the Jilin-1 constellation — the country's first self-developed commercial remote sensing satellite system — alongside government programs like Gaofen. Much like the Mosaic browser's free distribution model accelerated mainstream internet accessibility in the 1990s, China's parallel public and commercial satellite frameworks have helped broaden access to remote sensing data across research and industry sectors.

How CNSA and National Defence Authorities Manage the Gaofen Program

Though the Gaofen program carries clear dual-use implications, it's formally managed as a civilian initiative under CNSA, which initiated it in May 2010 as one of 16 national science and technology projects.

Civilian oversight runs deep, with CNSA coordinating launches, commissioning, and data distribution through EOSDC-CNSA to ministries, local governments, and research institutions.

Yet the program's high-resolution capabilities quietly serve broader strategic interests.

Here's how management breaks down:

1. CNSA directs satellite launches from sites like Taiyuan
2. EOSDC-CNSA handles data receipt, processing, and distribution
3. User ministries receive formal handover through commissioning ceremonies
4. No explicit National Defence Authority role appears in civilian documentation

You're watching a program where civilian oversight and dual-use implications coexist without official acknowledgment. Gaofen images and data are now accessed by registered users worldwide through a CNSA-operated website, spanning more than 20 industries across China. During trial operation alone, satellites in the program have transmitted staggering volumes of data, with Gaofen 5-01A sending back 245 terabytes and nearly 86,000 remote-sensing images to support ecosystem protection and climate response efforts. Baidu Maps, which holds over 70% mapping market share in China, has integrated some of this geolocated satellite data to support location-based services and urban planning applications across the country.

What Came After Gaofen-6 in the Series?

Several satellites followed Gaofen-6, each expanding the program's capabilities in distinct directions. Just weeks after Gaofen-6's launch, Gaofen-11-01 lifted off on July 31, 2018, carrying electro-optical imaging equipment into a sun-synchronous orbit. These post Gaofen-6 follow-on missions pushed into new technical territory.

Gaofen-7 arrived in November 2019, delivering 0.8m panchromatic and 2.5m multispectral imaging. Gaofen-10R followed in October 2019 after an earlier launch failure, operating at a higher 632 km orbit. Gaofen-5 01A launched in December 2022, adding hyperspectral and atmospheric monitoring through AHSI, WTI, and EMI payloads.

You can also trace SAR expansion through HJ-2E and HJ-2F, both supporting all-weather disaster and agricultural monitoring. Each follow-on mission addressed gaps the earlier satellites couldn't cover. China's broader fleet is projected to reach 40 satellites by 2030, incorporating more diverse payloads and orbits to further strengthen its Earth observation infrastructure.