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-1BCDE:
Manufacturing of Flight Hardware

GRUS First Light Image

AxelGlobe

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

Axelspace Projects

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