Success criteria
| Mission | Minimum | Full | Extra |
|---|---|---|---|
| Overall | Establish communication with Chiba Tech and downlink a photo | Full Success of each mission | Extra Success of each mission |
| Pumice imaging | Take consecutive images and downlink the data | Photograph the sea around Fukutoku-Okanoba at 200 m resolution | Photograph and analyze pumice at sea |
| Aurora imaging | Same as above | Photograph the aurora and analyze its distribution | Photograph a low-latitude aurora and determine its latitude |
| Corn imaging | Same as above | Photograph corn fields and analyze growth | Monitor for 3 weeks |
| Gyro | Acquire angle data and downlink it | Provide an app based on the measured data | Improve the app from feedback |
| APRS | One APRS contact with Chiba Tech | APRS contacts with radio amateurs around the world | 8 hours of continuous APRS operation |
| CIGS | Acquire current and voltage in HK | — | — |
1. Pumice imaging
Photographs pumice produced by a submarine volcanic eruption from above Okinawa Prefecture and makes a drift forecast map Each capture takes 10 consecutive images at 3.0 to 4.5 s intervals
2. Aurora imaging
Photographs the aurora above North America or west of Australia and estimates the effect of solar flares from the latitude of occurrence Each capture takes 9 consecutive images at 30 to 45 s intervals
3. Corn imaging
Photographs corn fields in South Dakota, USA, to check crop growth Each capture takes 2 images at 3.0 to 4.5 s intervals The VARI, RGBVI and GRVI vegetation indices are computed on board
| Item | Value |
|---|---|
| Camera controller | Raspberry Pi Zero 2 W |
| Field of view | 63° × 51°, fixed focus |
| Capture parameters | Exposure compensation, ISO, shutter speed, interval |
| Minimum interval | 3 s |
| Thumbnail | 240 × 135 px |
| Cropped image | 432 × 256 px |
4. Gyro
Provides learning software that uses the satellite attitude data The gyro MCU measures quaternions and the current of each face, which are animated in Unity Automatic measurement runs 40 min after deployment Mission temperature range is −20 to +35 ℃
5. APRS
The APRS digipeater is started by a ground station command Maximum continuous operation is 720 min, 8 orbits Specifications are on the Comms page
6. CIGS
CIGS solar cells provided by Idemitsu Kosan are mounted on the +Z panel and demonstrated in orbit Voltage, current and panel temperature are acquired as HK telemetry every 90 s