Projects
GRUS-1
The Next Generation of
Earth-Observation Satellites
GRUS is a next-generation remote-sensing microsatellite, the building block of Axelspace’s Earth observation constellation. Even with its mass of around 100kg, it will enable us to obtain images with 2.5m ground resolution. The first satellite was launched in 2018 followed by many more in the oncoming years, making high-frequency Earth monitoring a reality.
GRUS-1D is the code name of Fukui Prefectural Satellite “SUISEN”.
GRUS-1A:
Normal Operation in orbit
GRUS-1A:
Normal Operation in orbitGRUS-1BCDE:
Manufacturing of Flight Hardware
Background and Objectives
Until now, satellite imagery of the Earth has always involved high costs and very limited freedom in capture timing. The main reason for this problem was the use of large, expensive remote-sensing satellites. The huge manufacturing costs of the spacecraft affected that of the imagery and made it impossible to build and launch high numbers of units. With so few satellites, the users who requested the imagery were forced to wait in line, and the revisit times of the desired locations were inevitably long. Furthermore, image request opportunities were mostly taken up by highly-specialized “heavy users” who left little room for requests by broader, more generic markets.
GRUS is our response to this situation. We will leverage the low costs of microsatellite technology to build a vast network capable of high-frequency observation of most of the Earth’s dry land. Users will use our AxelGlobe platform to access always-up-to-date, affordable and complete imagery data.
GRUS will produce images in the panchromatic (grayscale) spectrum with 2.5 m of ground resolution, i.e. the minimum discernible distance between two separate objects. Additionally, it will take multispectral (color) photographs in the blue, green, red, “red edge” (useful for vegetation analysis) and near-infrared bands. Despite being a microsatellite, GRUS will use the latest in optical and sensor technology to deliver images spanning more than 50 km in width, allowing for highly efficient coverage of the planet.
The large constellation of GRUS satellites will update the imagery of the Earth every day, enabling new and more meaningful uses in industries like agriculture, forestry, fishing, mapping, GIS and disaster monitoring. High-frequency data will allow not only for the traditional “assessment of the present”, but also for the observation of trends and the prediction of future phenomena.
The first GRUS satellite reached orbit in 2018. After that, we will keep on launching more of them at a high pace.
| Ground Resolution | Panchromatic: 2.5 m | |
|---|---|---|
| Multispectral: 5.0 m | ||
| Spectral Bands | Panchromatic | 450-900 nm |
| Blue | 450-505 nm | |
| Green | 515-585 nm | |
| Red | 620-685 nm | |
| Red Edge | 705-745 nm | |
| Near Infrared | 770-900 nm | |
| Swath | 57+ Km | |
| Life Span | 5+ years | |
| Bit Depth | 12 bit | |
| Image Acquisition Mode | Push-broom | |
|---|---|---|
| Ground Resolution | 6.7 m | |
| Spectral bands | Blue | 450-520 nm |
| Green | 520-600 nm | |
| Red | 630-690 nm | |
| Near Infrared | 780-890 nm | |
| Signal/Noise Ratio | Blue | 153 |
| Green | 178 | |
| Red | 235 | |
| Near Infrared | 167 | |
| Swath Width | 27.8 Km | |
| Maximum Continuous Image Length |
179 Km | |
| Bit Depth | 12 bits | |
| Dimensions | 600 x 600 x 800 mm (excluding protrusions) |
|---|---|
| Mass | 100kg |
| Downlink Rate | 200 Mbps |
GRUS-1A
| Launch Date and Time | December 27, 2018 11:07:18 AM (Japan Standard Time) |
|---|---|
| Launch Vehicle | Soyuz-2 |
| Launch Site | Vostochny Cosmodrome, Russia |
| Orbit | Sun-synchronous orbit, 600km altitude |
GRUS-1B, 1C, 1D, 1E
| Launch Date | March 20, 2021 (planned) |
|---|---|
| Launch Vehicle | Soyuz-2 |
| Launch Site | Baikonur Cosmodrome, Kazakhstan (planned) |
| Orbit | Sun-synchronous orbit, 600km altitude |
Track record
Our projects
WNISAT-1
HODOYOSHI-1
WNISAT-1R
GRUS-1
RAPIS-1
GRUS-1BCDE