Daiti ( Jap. だ い ち , "Earth", Eng. Daichi , also ALOS ( Eng. A dvanced L and O bservation S atellite )) is a Japanese satellite for remote sensing of the Earth , designed to monitor the Earth's surface and oceans. The satellite was launched on January 24, 2006 from the Tanegashima Space Center using the H-IIA launch vehicle .
| Daiti Jap. だ い ち | |
|---|---|
| Alos, daichi | |
| Customer |  Jaxa |
| Manufacturer | NEC Toshiba Space Systems |
| Operator | |
| Tasks | Earth remote sensing |
| Satellite | Land |
| Launch pad | Tanegashima |
| Carrier rocket | H-IIA , flight F8 |
| Launch | January 24, 2006 01:33 UTC |
| Flight duration | 13 years, 6 months, 8 days |
| NSSDC ID | 2006-002A |
| SCN | 28931 |
| Specifications | |
| Weight | 3850 kg |
| Dimensions | Satellite: 6.2 × 3.5 × 4 m SAT : 3.1 × 22.2 m PULSAR antenna: 8.9 × 3.1 m |
| Power | not less than 7 kW |
| Orientation | 3-axle |
| Active life | 5 years |
| Orbit elements | |
| Orbit type | sun synchronous |
| Big axis | 7070 km |
| Eccentricity | 1,413 |
| Mood | 98.2 ° |
| Period of treatment | 98.7 minutes |
| Apocenter | 700.0 km |
| Pericenter | 698.0 km |
| Repeat Interval | 46 days |
| Target equipment | |
| PRISM | Panchromatic 28 megapixel sensor (CCD) stereo images |
| AVNIR-2 | 7 megapixel radiometer (CCD) of visible and near infrared range |
| Palssar | synthetic aperture L-band radar |
| Spatial resolution | PRISM : 2.5 m AVNIR-2 : 10 m PALSAR : 10 m and 100 m |
| Capture band | PRISM : 35 km (3 cameras) and 70 km (nadir only) AVNIR-2 : 70 km PALSAR : 70 km and 250-350 km |
| Spectral band | PRISM : 0,52—0,77 microns AVNIR-2 : 0.42—0.50, 0.52—0.60, 0.61—0.69 and 0.76—0.89 microns PALSAR : 1.27 GHz |
| Transmission speed | up to 240 Mbps |
| Onboard memory | 90 GB SSD |
| Project site | |
The satellite was created by Mitsubishi Electric and was originally called ALOS (from the English Advanced Land Observation Satellite ), after launching it was given the name Daiti ( jap. い ち ), which translated from Japanese means land or land. To accomplish its main task, three instruments are mounted on the spacecraft:
- AVNIR-2 (from the English. Advanced Visible and Near Infrared Radiometr ) - radiometer .
- capable of measuring the surface with a resolution of 10 meters and a capture width of 70 km .
- PALSAR (from the English. Phased Array L-band Synthetic Aperture Radar ) - radar .
- The device operates in two modes with an operating frequency of 1.27 GHz (L-band), in high resolution and in scanning mode, with the maximum resolution on the ground being 10 meters (the width of the capture band is 70 km ).
- PRISM (from the English. Panchromatic Remote-sensing Instrument of Stereo Mapping ).
- consists of three panchromatic cameras and is designed to produce a black and white stereo image with a maximum resolution of 2.5 meters.