Names | Resurs-DK1 |
---|---|
Mission type | Earth observation |
Operator | NTs OMZ |
COSPAR ID | 2006-021A |
SATCAT no. | 29228 |
Website | eng |
Mission duration | 3 years (planned) [1] 9 years, 7 months, 22 days (achieved) [2] |
Spacecraft properties | |
Bus | Yantar [3] |
Manufacturer | TsSKB-Progress |
Launch mass | 6,570 kg (14,480 lb) [1] |
Payload mass | 1,200 kg (2,600 lb) |
Dimensions | 7.93 × 2.72 m (26.0 × 8.9 ft) |
Start of mission | |
Launch date | 15 June 2006, 08:00:00 UTC [4] |
Rocket | Soyuz-U |
Launch site | Baikonur, Site 1/5 [5] |
Contractor | TsSKV-Progress |
End of mission | |
Disposal | Decommissioned |
Deactivated | 7 February 2016 [2] |
Orbital parameters | |
Reference system | Geocentric orbit [6] |
Regime | Low Earth orbit |
Perigee altitude | 555.74 km (345.32 mi) |
Apogee altitude | 566.46 km (351.98 mi) |
Inclination | 69.94° |
Period | 95.88 minutes |
Instruments | |
Geoton-1 PAMELA ARINA | |
Russian Earth observation |
Resurs-DK No.1, [7] also called Resurs-DK1, was a commercial Earth observation satellite capable of transmitting high-resolution imagery (up to 0.9 m) to the ground stations as it passed overhead. The spacecraft was operated by NTs OMZ, the Russian Research Center for Earth Operative Monitoring.
The satellite was designed for multi-spectral remote sensing of the Earth's surface aimed at acquiring high-quality visible images in near real-time as well as on-line data delivery via radio link and providing a wide range of consumers with value-added processed data.
The Russian space tracking service, ASPOS OKP, reported that the spacecraft's onboard systems and attitude control had been terminated in February 2016. Tracking of the satellite was discontinued on 1 March 2016. [2]
The Resurs-DK spacecraft was built by the Russian space company TsSKB-Progress in Samara, Russia. It was a modified version of the military reconnaissance satellite Yantar-4KS1 (Terilen). [8] The spacecraft was three-axis stabilized. The design lifetime was no less than three years, with an expected lifetime of five years. Ground location accuracy was 100 m (330 ft). Onboard storage was 768 gigabits. Data link speed to the ground station was 300 Mbit/s. Maximum daily productivity was 1,000,000 km2 (390,000 sq mi).
Resurs is Russian for "Resource". The letters DK are the initials of Dmitry Kozlov, chief designer of the first satellite of the Yantar-2K class.
Made by Vavilov State Optical Institute, Russia Archived 3 March 2016 at the Wayback Machine .
It was not possible to represent an image in true-color because there was no blue band (0.4 - 0.5 μm). However, it was possible to combine red, green and near infrared in such way that the appearance of the displayed image resembles a visible colour photograph, i.e. vegetation in green, water in blue, soil in brown. This was not always possible because two similarly coloured objects can have completely different reactions to near IR light.
Green, red and near IR are typically combined to make a traditional false color composite where the near IR is displayed in red, the red is displayed in green, and the green is displayed in blue. This combination is favoured by scientists because near IR is useful for detection of numerous vegetation types. Vegetation appear as redtones, the brighter the red, the healthier the vegetation. Soils with no or sparse vegetation range from white (sand, salt) to greens or browns depending on moisture and organic matter content. Water appears blue, clear water is dark blue to black while shallow waters or waters with high sediment concentrations are lighter blue. Urban areas will appear blue towards gray. Clouds and snow are white.
Unit featured 4 TDI (Time Delay and Integration) sensor arrays, one panchromatic and three multispectral. Each sensor array was composed of 36 "Kruiz" CCD chips. Effective length of the single array was about 36000 pixels. Arrays were grouped in 3 separated lines:
This separation was causing a time delay of the colour images combined from green, red and near infrared, so fast-moving objects were shown in triplets. Moving object speed and direction could be calculated. All 4 arrays could work simultaneously, so it was possible to combine panchromatic and 3 multispectral images in one pansharpened color composite.
The system used 10-bit analog-to-digital converters.
Focal Plane Unit was made by NPO Opteks, Russia .
The CCD "Kruiz" was a 1024 pixel x 128 line, high speed TDI sensor. The active imaging area was organized as 1024 vertical columns and 128 horizontal TDI rows. [ permanent dead link ]
Designed jointly by NPO Opteks and ELECTRON-OPTRONIC.
Produced by ELECTRON-OPTRONIC (now is ELAR )
At the altitude of 360 km:
At the altitude of 604 km:
The revisit rate was 5 to 7 days off-nadir.
Swath width at the altitude of 350 km:
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