HiSea SAR
The HiSea SAR consists of imagery captured from two satellites: HiSea-1 and Chaohu-1. The first one, HiSea-1, is the world’s first commercial C-band small satellite that can provide high-quality SAR remote-sensed images whose finest spatial resolution and maximum observation width reach 1 m and 100 km, respectively.
The working orbit of HiSea-1 is a sun-synchronous circular orbit with a height of 512 km and an inclination of about 97°, and the mean local solar time is 12:00 (UTC +8:00). The shooting position can also be adjusted flexibly according to the mission; the global visiting rate may be up to 78.2% for three days, 95.5% for six days, and 99.78% for ten days.
The payload of HiSea-1 has four imaging modes: striping, spotlight, and narrow and extra scanning modes (table below). The incident angle is from 20° to 35° and the polarization is single VV (vertical transmit and vertical receive) polarization, which is vertical transmission and vertical reception. The spatial resolution and observation widths are 3 m and 20 km respectively in striping mode, while the spatial resolution can reach as high as 1 m (azimuth) in spotlight mode. The spatial resolution and observation width of scanning mode are 10 m and 50 km, or in wide mode (Extra ScanSAR), 20 m and 100 km.
Imaging Mode | Standard scene size (km) | Incidence angle range (º) | Spatial Resolution(m) |
SpotLight | 4 x 5 | 20-35 | up to 1 |
StripMap | 20 x 20 | 20-35 | 3 |
Narrow ScanSAR | 50 x 50 | 20-35 | 10 |
| Extra ScanSAR | 100 x 100 | 20-35 | 20 |
The Chaohu-1 satellite is the second commercial C-band SAR remote sensing satellite after the HiSea-1. Together with HiSea-1, the Chaohu-1 will further enhance SAR data services, providing unique advantages for remote sensing applications with its high-resolution and very good quality images, day or night, rain or shine, or under other complex meteorological or luminosity conditions.
The payload of Chaohu-1 has also four imaging modes: striping, spotlight, and narrow and extra scanning modes (table below). The incident angle is from 15° to 41° and the polarization is single VV (vertical transmit and vertical receive) polarization, which is vertical transmission and vertical reception. The spatial resolution and observation widths are 3 m and 20 km respectively in striping mode, while the spatial resolution can reach as high as 50 cm (azimuth) in spotlight mode. The spatial resolution and observation width of scanning mode are 12m and 50 km, or in wide mode (Extra ScanSAR), 20 m and 100 km.
Imaging Mode | Nominal swath width (km) | Incidence angle range (º) | Spatial Resolution(m) |
SpotLight | 20 | 15-41 | up to 0.5 |
StripMap | 5 | 15-41 | 3 |
Narrow ScanSAR | 50 | 15-41 | 12 |
| Extra ScanSAR | 100 | 15-41 | 20 |
Key features
High quality high spatial resolution C-Band SAR imagery.
4 acquisition modes with nominal spatial resolution up to 50 centimeters.
2-3 days global mean revisit time.
Weather and daylight-independent site access to any point on Earth.
Satellite tasking capability to meet your project requirements.
Part of +60 on-orbit Chinese Earth observation satellite series.
Key applications
Maritime
Detecting ships and vessels
Mapping oil spills and position forecasting
Mapping of fishing zones
Detecting ships and vessels
Mapping oil spills and position forecasting
Mapping of fishing zones
Infrastructure
Monitoring illegal construction
Analyzing roads' condition
Generating elevation model at local level
Monitoring illegal construction
Analyzing roads' condition
Generating elevation model at local level
Forestry
Assessing slope failure and soil erosion
Detecting forest roads
Estimating number of trees per unit area
Assessing slope failure and soil erosion
Detecting forest roads
Estimating number of trees per unit area
FAQs
The minimum order for HiSea SAR imagery is 25 km² for Archive and 100 km² for New tasking, with minimum AOI width of 5km.
