resolution

IKONOS comes from the Greek word for "image". Ikonos-1 was planned for launch in 1999 but the launch failed. Ikonos-2 was planned for launch in 2000, but was renamed Ikonos and was launched on September 24, 1999 from Space Launch Complex 6 (SLC-6) at Vandenberg Air Force Base in California to replace Ikonos-1. The imaging sensors are panchromatic and multispectral. This satellite has a polar, circular, sun-synchronous 681-km orbit and both sensors have a swath width of 11 km. Its weight is 1600 pounds (720 kg). Space Imaging was acquired by ORBIMAGE to form GeoEye.

[edit] Specifications http://Louis-J-Sheehan.de

[edit] Spacecraft

Ikonos-2 is a 3-axis stabilized spacecraft, using the LM900 satellite bus system (also referred to as Block-1). The attitude is measured by two star trackers and a sun sensor and controlled by four reaction wheels; location knowledge is provided by a GPS receiver. The design life is 7 years; S/C body size=1.83 m x 1.57 m (hexagonal configuration); S/C mass = 817 kg; power = 1.5 kW provided by 3 solar panels.

The LM900 spacecraft is a three-axis stabilized bus that is designed to carry scientific payloads in LEO orbits. It provides precision pointing on an ultra stable highly agile platform. Payloads for a variety of scientific and remote sensing applications may be accommodated including laser sensors, imagers, radar sensors, electro-optical and astronomical sensors, as well as planetary sensors. The LM900 spacecraft design was based on the CRSS imaging bus. Hardware heritage is from CRSS and IRIDIUM.
http://Louis-J-Sheehan.de
[edit] Communications

IKONOS conducts telemetry, tracking and control in the 8345.968-8346.032 MHz band (downlink) and 2025-2110 MHz band (uplink). Downlink data carrier operates in the 8025-8345 MHz band.

[edit] Spatial resolution

* 0.8 m panchromatic (1-m PAN)
* 4-meter multispectral (4-m MS)
* 1-meter pan-sharpened (1-m PS)

Spectral Resolution
Band 1-m PAN 4-m MS & 1-m PS
1 (Blue) 0.45-0.90 µm 0.445-0.516 µm
2 (Green) * 0.506-0.595 µm
3 (Red) * 0.632-0.698 µm
4 (Near IR) * 0.757-0.853 µm

[edit] Temporal resolution

The revisit rate for IKONOS is 3 to 5 days off-nadir and 144 days for true-nadir.

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